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共用题干
Ecosystem

1 The word " ecosystem" is short for ecological（生态的）system. An ecosystem is where living crea-
tures expand within a given area.You can say that an ecosystem is the natural environment where biological
organisms（生物）such as plants,animals and humans co-exist in this world. So naturally that includes you
and mne.Yes,we are all members of an ecosystem!
2 There are different kinds of ecosystems depending on the type of suiface or environment. Most are
naturally made 5uch as the ocean or lake and the desert or rainforest.Some are man-made or artificial to en-
courage co-habitation（共居）between living and non-living things in a monitored environment,such as a
zoo or garden.
3 Plants make up the biggest group of biological creatures within an ecosystem,and that's because
they are the natural food producers for everyone.Plants raised in the earth need air and collect sunlight to
help them grow.When they grow,the plants and their加its or flowers eventually become a source of food to
animals,microorganisms (微生物）and even humans, of course. Food is then converted to energy for the rest
of us to function,and this happens in a never-ending cycle until the living creatures die and break up back
in the earth.
4 Ecosystems are the basis of survival for all living things.We depend on plants and animals for food.
In order for us to exist,we need to grow and care about other organisms.We also need tO care for the non一living
things within our environment like our air and water so we can continue living as a population.Since plants,
animals and humans are all of various species（物种）,we all play a role in maintaining the ecosystem.
5 To preserve our ecosystems,we should stop using too much energy,which happens汕en we consume more
than our share of resources. Humans should not disturb the natural habitat（栖息地）of plants and animals,
and should allow them to grow healthily for the cycle to continue.Too many people in a habitat can mean dis-
placement（搬迁）:imagine being thrown out of your home because there is no more space for everyone.
Worse,overpopulation can also ruin the environment and cause destruction of existing plants and animals.

To protect our ecosystems we should not use more than_________.
A:our share of resourees
B:a biological creature
C:a given area
D:the maintenance of the ecosystem
E:the source of food
F:various species

参考答案

参考解析
解析：由第二段的“There are different kinds of ecosystems depending on the type of surface or en- vironment.Most are naturally made...Some are man-made...”可知该段主要介绍了不同种类的生 态系统。故选B。
第三段讲到，根植于土壤中的植物利用空气和阳光促进自身生长，又成为动物和微生物的食物来源，而动物死后则又分解到土壤中二所以此段讲的是生态系统的工作原理。
第四段的主要内容是，生态系统是一切生物生存的基础，我们需要从中获取各种生存所 必需的物质。
此段主要讲要维护生态系统，我们需要做些什么，从“To preserve our ecosystems, we should stop using too much energy...""Humans should not disturb the natural habitat..."等表述可 以看出来。
由第一段第二句话“An ecosystem is where living creatures expand within a given area.”可 看出答案。
山第三段第三句话“When they grow, the plants and their fruits or flowers eventually be- come a source of food to animals…”可知答案。
由第四段末尾“…we all play a role in maintaining the ecosystem.”可知答案。effective在 此意为“起作用的”。
由最后一段第一句话“To preserve our ecosystems, we should stop using too much energy, which happens when we consume more than our share of resources.”可知答案。第4部分：阅读理解第一篇 文章主要讲的是公共上地在美国能源生产方面的重大作用，分别从产量、税收、未开发的传 统能源、替代能源占全国的份额以及能源开发需求等方面进行了介绍。
更多 “共用题干 Ecosystem1 The word " ecosystem" is short for ecological（生态的）system. An ecosystem is where living crea- tures expand within a given area.You can say that an ecosystem is the natural environment where biologicalorganisms（生物）such as plants,animals and humans co-exist in this world. So naturally that includes you and mne.Yes,we are all members of an ecosystem!2 There are different kinds of ecosystems depending on the type of suiface or environment. Most are naturally made 5uch as the ocean or lake and the desert or rainforest.Some are man-made or artificial to en- courage co-habitation（共居）between living and non-living things in a monitored environment,such as azoo or garden.3 Plants make up the biggest group of biological creatures within an ecosystem,and that's because they are the natural food producers for everyone.Plants raised in the earth need air and collect sunlight to help them grow.When they grow,the plants and their加its or flowers eventually become a source of food to animals,microorganisms (微生物）and even humans, of course. Food is then converted to energy for the rest of us to function,and this happens in a never-ending cycle until the living creatures die and break up back in the earth.4 Ecosystems are the basis of survival for all living things.We depend on plants and animals for food. In order for us to exist,we need to grow and care about other organisms.We also need tO care for the non一living things within our environment like our air and water so we can continue living as a population.Since plants, animals and humans are all of various species（物种）,we all play a role in maintaining the ecosystem.5 To preserve our ecosystems,we should stop using too much energy,which happens汕en we consume more than our share of resources. Humans should not disturb the natural habitat（栖息地）of plants and animals, and should allow them to grow healthily for the cycle to continue.Too many people in a habitat can mean dis- placement（搬迁）:imagine being thrown out of your home because there is no more space for everyone. Worse,overpopulation can also ruin the environment and cause destruction of existing plants and animals.To protect our ecosystems we should not use more than_________.A:our share of resoureesB:a biological creatureC:a given areaD:the maintenance of the ecosystemE:the source of foodF:various species” 相关考题
考题 共用题干 第二篇Ants Have Big Impact on Environment as "Ecosystem Engineers"Research by the University of Exeter has revealed that ants have a big impact on their local environment as a result of their activity as"ecosystem engineers"and predators.The study,published in the Journal of Animal Ecology,found that ants have two distinct effects on their local environment.Firstly,through moving the soil by nest building activity and by collecting food they affect the level of nutrients in the soil.This can indirectly impact the local populations of many animal groups,from decomposers to species much higher up the food chain.Secondly,they prey on a wide range of other animals,including larger prey which can be attacked by vast numbers of ant workers.Dirk Sanders,an author of the study from the university's Centre for Ecology and Conservation,said, "Ants are very effective predators which thrive in huge numbers.They're also very territorial and very aggressive,defending their resources and territory against other predators.All of this means they have a strong influence on their surrounding area.""In this research,we studied for the first time how big this impact is and the subtleties of it.What we found is that despite being predators,their presence can also lead to an increase in density and diversity of other animal groups.They genuinely play a key role in the local environment,having a big influence on the grassland food web,"Sanders said.The study,carried out in Germany,studied the impact of the presence of different combinations and densities of black garden ants and common red ants,both of which can be found across Europe,including the UK. It found that a low density of ants in an area increased the diversity and density of other animals in the local area,particularly the density of herbivores and decomposers.At higher densities ants had no or the opposite effect,the predation counteracting the positive influence.Dr Frank van Veen,another author on the study,said:"What we find is that the impact of ants on soil nutrient levels has a positive effect on animal groups at low levels,but as the number of ants increases,their predatory impacts have the bigger effect一thereby counteracting the positive influence via ecosystem engineering."Ants are important components of the ecosystem not only because they constitute a great part of the animal biomass but also because they act as ecosystem engineers.Ant biodiversity is incredibly high,and these organisms are highly responsive to human impact,which obviously reduces its richness.However,it is not clear how such disturbance damages the maintenance of ant services to the ecosystem.Ants are important in below ground processes through the alteration of the physical and chemical environment and through their effects on plants,microorganisms,and other soil organisms.As predators,ants ________________.A:prey on small as well as large animalsB:collect nutritious food from the soilC:collect food as decomposersD:prey on species much higher up the food chain
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考题 共用题干 第二篇Ants Have Big Impact on Environment as "Ecosystem Engineers"Research by the University of Exeter has revealed that ants have a big impact on their local environment as a result of their activity as"ecosystem engineers"and predators.The study,published in the Journal of Animal Ecology,found that ants have two distinct effects on their local environment.Firstly,through moving the soil by nest building activity and by collecting food they affect the level of nutrients in the soil.This can indirectly impact the local populations of many animal groups,from decomposers to species much higher up the food chain.Secondly,they prey on a wide range of other animals,including larger prey which can be attacked by vast numbers of ant workers.Dirk Sanders,an author of the study from the university's Centre for Ecology and Conservation,said, "Ants are very effective predators which thrive in huge numbers.They're also very territorial and very aggressive,defending their resources and territory against other predators.All of this means they have a strong influence on their surrounding area.""In this research,we studied for the first time how big this impact is and the subtleties of it.What we found is that despite being predators,their presence can also lead to an increase in density and diversity of other animal groups.They genuinely play a key role in the local environment,having a big influence on the grassland food web,"Sanders said.The study,carried out in Germany,studied the impact of the presence of different combinations and densities of black garden ants and common red ants,both of which can be found across Europe,including the UK. It found that a low density of ants in an area increased the diversity and density of other animals in the local area,particularly the density of herbivores and decomposers.At higher densities ants had no or the opposite effect,the predation counteracting the positive influence.Dr Frank van Veen,another author on the study,said:"What we find is that the impact of ants on soil nutrient levels has a positive effect on animal groups at low levels,but as the number of ants increases,their predatory impacts have the bigger effect一thereby counteracting the positive influence via ecosystem engineering."Ants are important components of the ecosystem not only because they constitute a great part of the animal biomass but also because they act as ecosystem engineers.Ant biodiversity is incredibly high,and these organisms are highly responsive to human impact,which obviously reduces its richness.However,it is not clear how such disturbance damages the maintenance of ant services to the ecosystem.Ants are important in below ground processes through the alteration of the physical and chemical environment and through their effects on plants,microorganisms,and other soil organisms.Why are ants compared to ecosystem engineers?A:Because they build their own nests.B:Because they collect food.C:Because their activity affects the environment.D:Because they are predators.
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考题 共用题干 第二篇Ants Have Big Impact on Environment as "Ecosystem Engineers"Research by the University of Exeter has revealed that ants have a big impact on their local environment as a result of their activity as"ecosystem engineers"and predators.The study,published in the Journal of Animal Ecology,found that ants have two distinct effects on their local environment.Firstly,through moving the soil by nest building activity and by collecting food they affect the level of nutrients in the soil.This can indirectly impact the local populations of many animal groups,from decomposers to species much higher up the food chain.Secondly,they prey on a wide range of other animals,including larger prey which can be attacked by vast numbers of ant workers.Dirk Sanders,an author of the study from the university's Centre for Ecology and Conservation,said, "Ants are very effective predators which thrive in huge numbers.They're also very territorial and very aggressive,defending their resources and territory against other predators.All of this means they have a strong influence on their surrounding area.""In this research,we studied for the first time how big this impact is and the subtleties of it.What we found is that despite being predators,their presence can also lead to an increase in density and diversity of other animal groups.They genuinely play a key role in the local environment,having a big influence on the grassland food web,"Sanders said.The study,carried out in Germany,studied the impact of the presence of different combinations and densities of black garden ants and common red ants,both of which can be found across Europe,including the UK. It found that a low density of ants in an area increased the diversity and density of other animals in the local area,particularly the density of herbivores and decomposers.At higher densities ants had no or the opposite effect,the predation counteracting the positive influence.Dr Frank van Veen,another author on the study,said:"What we find is that the impact of ants on soil nutrient levels has a positive effect on animal groups at low levels,but as the number of ants increases,their predatory impacts have the bigger effect一thereby counteracting the positive influence via ecosystem engineering."Ants are important components of the ecosystem not only because they constitute a great part of the animal biomass but also because they act as ecosystem engineers.Ant biodiversity is incredibly high,and these organisms are highly responsive to human impact,which obviously reduces its richness.However,it is not clear how such disturbance damages the maintenance of ant services to the ecosystem.Ants are important in below ground processes through the alteration of the physical and chemical environment and through their effects on plants,microorganisms,and other soil organisms.Dirk Sanders' study centered on how ants_______________.A:can manage to thrive in huge numbersB:defend their resources and territory against other predators C:attack those invading animals for survivalD:produce such a big impact on the environment
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考题 共用题干 第二篇Ants Have Big Impact on Environment as "Ecosystem Engineers"Research by the University of Exeter has revealed that ants have a big impact on their local environment as a result of their activity as"ecosystem engineers"and predators.The study,published in the Journal of Animal Ecology,found that ants have two distinct effects on their local environment.Firstly,through moving the soil by nest building activity and by collecting food they affect the level of nutrients in the soil.This can indirectly impact the local populations of many animal groups,from decomposers to species much higher up the food chain.Secondly,they prey on a wide range of other animals,including larger prey which can be attacked by vast numbers of ant workers.Dirk Sanders,an author of the study from the university's Centre for Ecology and Conservation,said, "Ants are very effective predators which thrive in huge numbers.They're also very territorial and very aggressive,defending their resources and territory against other predators.All of this means they have a strong influence on their surrounding area.""In this research,we studied for the first time how big this impact is and the subtleties of it.What we found is that despite being predators,their presence can also lead to an increase in density and diversity of other animal groups.They genuinely play a key role in the local environment,having a big influence on the grassland food web,"Sanders said.The study,carried out in Germany,studied the impact of the presence of different combinations and densities of black garden ants and common red ants,both of which can be found across Europe,including the UK. It found that a low density of ants in an area increased the diversity and density of other animals in the local area,particularly the density of herbivores and decomposers.At higher densities ants had no or the opposite effect,the predation counteracting the positive influence.Dr Frank van Veen,another author on the study,said:"What we find is that the impact of ants on soil nutrient levels has a positive effect on animal groups at low levels,but as the number of ants increases,their predatory impacts have the bigger effect一thereby counteracting the positive influence via ecosystem engineering."Ants are important components of the ecosystem not only because they constitute a great part of the animal biomass but also because they act as ecosystem engineers.Ant biodiversity is incredibly high,and these organisms are highly responsive to human impact,which obviously reduces its richness.However,it is not clear how such disturbance damages the maintenance of ant services to the ecosystem.Ants are important in below ground processes through the alteration of the physical and chemical environment and through their effects on plants,microorganisms,and other soil organisms.What still remains unclear about ants,according to the last paragraph?A:What roles ants play in the ecosystem in which they live.B:How ants affect the animal diversity in a given ecosystem.C:How human activities affect ants' influence on a given ecosystem.D:How ants alter the physical and chemical environment.
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考题 共用题干 第二篇Research by the University of Exeter has revealed that ants have a big impact on their local en-vironment as a result of their activity as"ecosystem engineers"and predators.The study,published in the Journal of Animal Ecology,found that ants have two distinct effects on their local environment.Firstly,through moving of soil by nest building activity and by collecting food they affect the level of nutrients in the soil.This can indirectly impact the local populations of many animal groups, from decomposers to species much higher up the food chain.Secondly,they prey on a wide range of other animals,including larger prey which can be at-tacked by vast numbers of ant workers.Dirk Sanders,an author of the study from the university's Centre for Ecology and Conservation, said:"Ants are very effective predators which thrive in huge numbers.They're also very territorial and very aggressive,defending their resources and territory against other predators.All of this means they have a strong influence on their surrounding area.""In this research,we studied for the first time how big this impact is and the subtleties of it. What we found is that despite being predators,their presence can also lead to an increase in density and diversity of other animal groups.They genuinely play a key role in the local environment,haying a big influence on the grassland food web,"Sanders said.The study,carried out in Germany,studied the impact of the presence of different combinations and densities of black garden ants and common red ants,both species which can be found across Eurone.including in the UK.It found that a low density of ants in an area increased the diversity and density of other animals in the local area,particularly the density of herbivores and decomposers.At higher densities ants had no or the opposite effect,showing that predation is counteracting the positive influence.Dr Frank van Veen,another author on the study,said:"What we find is that the impact of ants on soil nutrient levels has a positive effect on animal groups at low levels,but as the number of ants increases,their predatory impacts have the bigger effect一thereby counteracting the positive influence via ecosystem engineering."Ants are important components of ecosystems not only because they constitute a great part of the animal biomass but also because they act as ecosystem engineers.Ant biodiversity is incredibly high and these organisms are highly responsive to human impact,which obviously reduces its richness. However,it is not clear how such disturbance damages the maintenance of ant services to the ecosystem.Ants are important in below ground processes through the alteration of the physical and chemical environment and through their effects on plants,microorganisms,and other soil organisms.What still remains unclear about ants,according to the last paragraph?A:What roles do ants play in the ecosystem in which they live?B:How do ants affect the animal diversity in a given ecosystem?C:How do human activities affect ants' influence on a given ecosystem?D:How do ants alter the physical and chemical environment?
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考题 共用题干 Ants Have Big Impact on Environment as“Ecosystem Engineers”Research by the University of Exeter has revealed that ants have a big impact on their local environment as a result of their activity as“ecosystem engineers”and predators. The study,published in the Journal of Animal Ecology,found that ants have two distinct effects on their local environment.Firstly,through moving of soil by nest building activity and by collecting food they af-fect the level of nutrients in the soil. This can indirectly impact the local populations of many animal groups,from decomposers to species much higher up the food chain.Secondly,they prey on a wide range of other animals,including larger prey which can be attacked by vast numbers of ant workers.Dirk Sanders,an author of the study from the university's Centre for Ecology and Con-servation,said:“Ants are very effective predators which thrive in huge numbers. They're al-so very territorial and very aggressive,defending their resources and territory against other predators. All of this means they have a strong influence on their surrounding area.”“In this research,we studied for the first time how big this impact is and the subtleties of it. What we found is that despite being predators,their presence can also lead to an increase in density and diversity of other animal groups. They genuinely play a key role in the local environment,having a big influence on the grassland food web,”Sanders said.The study,carried out in Germany,studied the impact of the presence of different combinations and densities of black garden ants and common red ants,both species which can be found across Europe,including in the UK.It found that a low density of ants in an area increased the diversity and density of other animals in the local area,particularly the density of herbivores and decomposers. At higher densities ants had no or the opposite effect,showing that predation is counteracting the positive influence.Dr Frank van Veen,another author on the study,said:“What we find is that the impact of ants on soil nutrient levels has a positive effect on animal groups at low levels,but as the number of ants increases,their predatory impacts have the bigger effect一thereby counteracting the positive influence via ecosystem engineering.”Ants are important components of ecosystems not only because they constitute a great part of the animal biomass but also because they act as ecosystem engineers. Ant biodiversity is incredibly high and these organisms are highly responsive to human impact,which obviously reduces its richness. However,it is not clear how such disturbance damages the maintenance of ant services to the ecosystem. Ants are important in below ground processes through the alteration of the physical and chemical environment and through their effects on plants,microorganisms,and other soil organisms.Why are ants compared to ecosystem engineers?A: Because they build their own nests.B: Because they collect food.C: Because their activity affects the environment.D: Because they are predators.
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考题 共用题干 Ants Have Big Impact on Environment as“Ecosystem Engineers”Research by the University of Exeter has revealed that ants have a big impact on their local environment as a result of their activity as“ecosystem engineers”and predators. The study,published in the Journal of Animal Ecology,found that ants have two distinct effects on their local environment.Firstly,through moving of soil by nest building activity and by collecting food they af-fect the level of nutrients in the soil. This can indirectly impact the local populations of many animal groups,from decomposers to species much higher up the food chain.Secondly,they prey on a wide range of other animals,including larger prey which can be attacked by vast numbers of ant workers.Dirk Sanders,an author of the study from the university's Centre for Ecology and Con-servation,said:“Ants are very effective predators which thrive in huge numbers. They're al-so very territorial and very aggressive,defending their resources and territory against other predators. All of this means they have a strong influence on their surrounding area.”“In this research,we studied for the first time how big this impact is and the subtleties of it. What we found is that despite being predators,their presence can also lead to an increase in density and diversity of other animal groups. They genuinely play a key role in the local environment,having a big influence on the grassland food web,”Sanders said.The study,carried out in Germany,studied the impact of the presence of different combinations and densities of black garden ants and common red ants,both species which can be found across Europe,including in the UK.It found that a low density of ants in an area increased the diversity and density of other animals in the local area,particularly the density of herbivores and decomposers. At higher densities ants had no or the opposite effect,showing that predation is counteracting the positive influence.Dr Frank van Veen,another author on the study,said:“What we find is that the impact of ants on soil nutrient levels has a positive effect on animal groups at low levels,but as the number of ants increases,their predatory impacts have the bigger effect一thereby counteracting the positive influence via ecosystem engineering.”Ants are important components of ecosystems not only because they constitute a great part of the animal biomass but also because they act as ecosystem engineers. Ant biodiversity is incredibly high and these organisms are highly responsive to human impact,which obviously reduces its richness. However,it is not clear how such disturbance damages the maintenance of ant services to the ecosystem. Ants are important in below ground processes through the alteration of the physical and chemical environment and through their effects on plants,microorganisms,and other soil organisms.Dirk Sanders'study centered on how ants______.A: can manage to thrive in huge numbersB: defend their resources and territory against other predatorsC: attack those invading animals for survivalD: produce such a big impact on the environment
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考题 共用题干 Ants Have Big Impact on Environment as“Ecosystem Engineers”Research by the University of Exeter has revealed that ants have a big impact on their local environment as a result of their activity as“ecosystem engineers”and predators. The study,published in the Journal of Animal Ecology,found that ants have two distinct effects on their local environment.Firstly,through moving of soil by nest building activity and by collecting food they af-fect the level of nutrients in the soil. This can indirectly impact the local populations of many animal groups,from decomposers to species much higher up the food chain.Secondly,they prey on a wide range of other animals,including larger prey which can be attacked by vast numbers of ant workers.Dirk Sanders,an author of the study from the university's Centre for Ecology and Con-servation,said:“Ants are very effective predators which thrive in huge numbers. They're al-so very territorial and very aggressive,defending their resources and territory against other predators. All of this means they have a strong influence on their surrounding area.”“In this research,we studied for the first time how big this impact is and the subtleties of it. What we found is that despite being predators,their presence can also lead to an increase in density and diversity of other animal groups. They genuinely play a key role in the local environment,having a big influence on the grassland food web,”Sanders said.The study,carried out in Germany,studied the impact of the presence of different combinations and densities of black garden ants and common red ants,both species which can be found across Europe,including in the UK.It found that a low density of ants in an area increased the diversity and density of other animals in the local area,particularly the density of herbivores and decomposers. At higher densities ants had no or the opposite effect,showing that predation is counteracting the positive influence.Dr Frank van Veen,another author on the study,said:“What we find is that the impact of ants on soil nutrient levels has a positive effect on animal groups at low levels,but as the number of ants increases,their predatory impacts have the bigger effect一thereby counteracting the positive influence via ecosystem engineering.”Ants are important components of ecosystems not only because they constitute a great part of the animal biomass but also because they act as ecosystem engineers. Ant biodiversity is incredibly high and these organisms are highly responsive to human impact,which obviously reduces its richness. However,it is not clear how such disturbance damages the maintenance of ant services to the ecosystem. Ants are important in below ground processes through the alteration of the physical and chemical environment and through their effects on plants,microorganisms,and other soil organisms.What still remains unclear about ants,according to the last paragraph?A: What roles do ants play in the ecosystem in which they live?B: How do ants affect the animal diversity in a given ecosystem?C: How do human activities affect ants'influence on a given ecosystem?D: How do ants alter the physical and chemical environment?
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考题 共用题干 Ecosystem1. The word “ecosystem” is short for ecological（生态的）system. An ecosystem is where living creatures expand within a given area. You can say that an ecosystem is the natural environment where biological organisms（生物）such as plants,animals and humans co-exist in this world. So naturally that includes you and me. Yes,we are all members of an ecosystem!2 .There are different kinds of ecosystems depending on the type of surface or environ-ment. Most are naturally made such as the ocean or lake and the desert or rainforest.Some are man-made or artificial to encourage co-habitation（同居）between living and non-living things in a monitored environment,such as a zoo or garden.3 .Plants make up the biggest group of biological creatures within an ecosystem,and that's because they are the natural food producers for everyone. Plants raised in the earth need air and collect sunlight to help them grow. When they grow,the plants and its fruits or flowers eventually become a source of food to animals,microorganisms（微生物）and even hu- mans,of course. Food is then converted to energy for the rest of us to function,and this hap-pens in a never-ending cycle until the living creatures die and break up back in the earth.4 .Ecosystems are the basis of survival for all living things.We depend on plants and ani-mals for food. In order for us to exist,we need to grow and care about other organisms. We also need to care for the non-living things within our environment like our air and water so we can continue living as a population. Since plants,animals and humans are all of various species（物种）,we all play a role in maintaining the ecosystem.5 .To preserve our ecosystems,we should stop using too much energy,which happens when we consume more than our share of resources. Humans should not disturb the natural habitat（栖息地）of plants and animals,and allow them to grow healthily for the cycle to con-tinue. Too many people in a habitat can mean displacement（搬迁）: imagine being thrown out of your home because there is no more space for everyone. Worse,overpopulation can also ru- in the environment and cause destruction of existing plants and animals.Plants,animals and humans are all effective in______.A: our share of resourcesB: a biological creatureC: a given areaD: the maintenance of the ecosystemE: the source of foodF: various species
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考题 共用题干 Ecosystem1. The word “ecosystem” is short for ecological（生态的）system. An ecosystem is where living creatures expand within a given area. You can say that an ecosystem is the natural environment where biological organisms（生物）such as plants,animals and humans co-exist in this world. So naturally that includes you and me. Yes,we are all members of an ecosystem!2 .There are different kinds of ecosystems depending on the type of surface or environ-ment. Most are naturally made such as the ocean or lake and the desert or rainforest.Some are man-made or artificial to encourage co-habitation（同居）between living and non-living things in a monitored environment,such as a zoo or garden.3 .Plants make up the biggest group of biological creatures within an ecosystem,and that's because they are the natural food producers for everyone. Plants raised in the earth need air and collect sunlight to help them grow. When they grow,the plants and its fruits or flowers eventually become a source of food to animals,microorganisms（微生物）and even hu- mans,of course. Food is then converted to energy for the rest of us to function,and this hap-pens in a never-ending cycle until the living creatures die and break up back in the earth.4 .Ecosystems are the basis of survival for all living things.We depend on plants and ani-mals for food. In order for us to exist,we need to grow and care about other organisms. We also need to care for the non-living things within our environment like our air and water so we can continue living as a population. Since plants,animals and humans are all of various species（物种）,we all play a role in maintaining the ecosystem.5 .To preserve our ecosystems,we should stop using too much energy,which happens when we consume more than our share of resources. Humans should not disturb the natural habitat（栖息地）of plants and animals,and allow them to grow healthily for the cycle to con-tinue. Too many people in a habitat can mean displacement（搬迁）: imagine being thrown out of your home because there is no more space for everyone. Worse,overpopulation can also ru- in the environment and cause destruction of existing plants and animals.In an ecosystem,plants,animals and humans live together in______.A: our share of resourcesB: a biological creatureC: a given areaD: the maintenance of the ecosystemE: the source of foodF: various species
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考题 共用题干 Ecosystem1. The word “ecosystem” is short for ecological（生态的）system. An ecosystem is where living creatures expand within a given area. You can say that an ecosystem is the natural environment where biological organisms（生物）such as plants,animals and humans co-exist in this world. So naturally that includes you and me. Yes,we are all members of an ecosystem!2 .There are different kinds of ecosystems depending on the type of surface or environ-ment. Most are naturally made such as the ocean or lake and the desert or rainforest.Some are man-made or artificial to encourage co-habitation（同居）between living and non-living things in a monitored environment,such as a zoo or garden.3 .Plants make up the biggest group of biological creatures within an ecosystem,and that's because they are the natural food producers for everyone. Plants raised in the earth need air and collect sunlight to help them grow. When they grow,the plants and its fruits or flowers eventually become a source of food to animals,microorganisms（微生物）and even hu- mans,of course. Food is then converted to energy for the rest of us to function,and this hap-pens in a never-ending cycle until the living creatures die and break up back in the earth.4 .Ecosystems are the basis of survival for all living things.We depend on plants and ani-mals for food. In order for us to exist,we need to grow and care about other organisms. We also need to care for the non-living things within our environment like our air and water so we can continue living as a population. Since plants,animals and humans are all of various species（物种）,we all play a role in maintaining the ecosystem.5 .To preserve our ecosystems,we should stop using too much energy,which happens when we consume more than our share of resources. Humans should not disturb the natural habitat（栖息地）of plants and animals,and allow them to grow healthily for the cycle to con-tinue. Too many people in a habitat can mean displacement（搬迁）: imagine being thrown out of your home because there is no more space for everyone. Worse,overpopulation can also ru- in the environment and cause destruction of existing plants and animals.To protect our ecosystems we should not use more than______.A: our share of resourcesB: a biological creatureC: a given areaD: the maintenance of the ecosystemE: the source of foodF: various species
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考题 共用题干 Ecosystem1. The word “ecosystem” is short for ecological（生态的）system. An ecosystem is where living creatures expand within a given area. You can say that an ecosystem is the natural environment where biological organisms（生物）such as plants,animals and humans co-exist in this world. So naturally that includes you and me. Yes,we are all members of an ecosystem!2 .There are different kinds of ecosystems depending on the type of surface or environ-ment. Most are naturally made such as the ocean or lake and the desert or rainforest.Some are man-made or artificial to encourage co-habitation（同居）between living and non-living things in a monitored environment,such as a zoo or garden.3 .Plants make up the biggest group of biological creatures within an ecosystem,and that's because they are the natural food producers for everyone. Plants raised in the earth need air and collect sunlight to help them grow. When they grow,the plants and its fruits or flowers eventually become a source of food to animals,microorganisms（微生物）and even hu- mans,of course. Food is then converted to energy for the rest of us to function,and this hap-pens in a never-ending cycle until the living creatures die and break up back in the earth.4 .Ecosystems are the basis of survival for all living things.We depend on plants and ani-mals for food. In order for us to exist,we need to grow and care about other organisms. We also need to care for the non-living things within our environment like our air and water so we can continue living as a population. Since plants,animals and humans are all of various species（物种）,we all play a role in maintaining the ecosystem.5 .To preserve our ecosystems,we should stop using too much energy,which happens when we consume more than our share of resources. Humans should not disturb the natural habitat（栖息地）of plants and animals,and allow them to grow healthily for the cycle to con-tinue. Too many people in a habitat can mean displacement（搬迁）: imagine being thrown out of your home because there is no more space for everyone. Worse,overpopulation can also ru- in the environment and cause destruction of existing plants and animals.Paragraph 2_________A: What Can We Do to Help Protect Ecosystems?B: What Are Different types of Ecosystems?C: What Is an Ecosystem?D: What Destroys Ecosystems?E: How Does an Ecosystem Work?F: Why Are Ecosystems Emportant?
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考题 共用题干 Ecosystem1. The word “ecosystem” is short for ecological（生态的）system. An ecosystem is where living creatures expand within a given area. You can say that an ecosystem is the natural environment where biological organisms（生物）such as plants,animals and humans co-exist in this world. So naturally that includes you and me. Yes,we are all members of an ecosystem!2 .There are different kinds of ecosystems depending on the type of surface or environ-ment. Most are naturally made such as the ocean or lake and the desert or rainforest.Some are man-made or artificial to encourage co-habitation（同居）between living and non-living things in a monitored environment,such as a zoo or garden.3 .Plants make up the biggest group of biological creatures within an ecosystem,and that's because they are the natural food producers for everyone. Plants raised in the earth need air and collect sunlight to help them grow. When they grow,the plants and its fruits or flowers eventually become a source of food to animals,microorganisms（微生物）and even hu- mans,of course. Food is then converted to energy for the rest of us to function,and this hap-pens in a never-ending cycle until the living creatures die and break up back in the earth.4 .Ecosystems are the basis of survival for all living things.We depend on plants and ani-mals for food. In order for us to exist,we need to grow and care about other organisms. We also need to care for the non-living things within our environment like our air and water so we can continue living as a population. Since plants,animals and humans are all of various species（物种）,we all play a role in maintaining the ecosystem.5 .To preserve our ecosystems,we should stop using too much energy,which happens when we consume more than our share of resources. Humans should not disturb the natural habitat（栖息地）of plants and animals,and allow them to grow healthily for the cycle to con-tinue. Too many people in a habitat can mean displacement（搬迁）: imagine being thrown out of your home because there is no more space for everyone. Worse,overpopulation can also ru- in the environment and cause destruction of existing plants and animals.Plants are essential in an ecosystem because to other living creatures they are______.A: our share of resourcesB: a biological creatureC: a given areaD: the maintenance of the ecosystemE: the source of foodF: various species
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考题 共用题干 Ecosystem1 The word " ecosystem" is short for ecological（生态的）system. An ecosystem is where living crea- tures expand within a given area.You can say that an ecosystem is the natural environment where biologicalorganisms（生物）such as plants,animals and humans co-exist in this world. So naturally that includes you and mne.Yes,we are all members of an ecosystem!2 There are different kinds of ecosystems depending on the type of suiface or environment. Most are naturally made 5uch as the ocean or lake and the desert or rainforest.Some are man-made or artificial to en- courage co-habitation（共居）between living and non-living things in a monitored environment,such as azoo or garden.3 Plants make up the biggest group of biological creatures within an ecosystem,and that's because they are the natural food producers for everyone.Plants raised in the earth need air and collect sunlight to help them grow.When they grow,the plants and their加its or flowers eventually become a source of food to animals,microorganisms (微生物）and even humans, of course. Food is then converted to energy for the rest of us to function,and this happens in a never-ending cycle until the living creatures die and break up back in the earth.4 Ecosystems are the basis of survival for all living things.We depend on plants and animals for food. In order for us to exist,we need to grow and care about other organisms.We also need tO care for the non一living things within our environment like our air and water so we can continue living as a population.Since plants, animals and humans are all of various species（物种）,we all play a role in maintaining the ecosystem.5 To preserve our ecosystems,we should stop using too much energy,which happens汕en we consume more than our share of resources. Humans should not disturb the natural habitat（栖息地）of plants and animals, and should allow them to grow healthily for the cycle to continue.Too many people in a habitat can mean dis- placement（搬迁）:imagine being thrown out of your home because there is no more space for everyone. Worse,overpopulation can also ruin the environment and cause destruction of existing plants and animals. Paragraph 3_______A: What Can We Do to Help Protect Ecosystems?B:What Are Different Types of Ecosystems？ C:What Is an Ecosystem？D: What Destroys Ecosystems? E:How does an Ecosystem Work?F: Why Are Ecosystems Important？
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考题 共用题干 Ecosystem1 The word " ecosystem" is short for ecological（生态的）system. An ecosystem is where living crea- tures expand within a given area.You can say that an ecosystem is the natural environment where biologicalorganisms（生物）such as plants,animals and humans co-exist in this world. So naturally that includes you and mne.Yes,we are all members of an ecosystem!2 There are different kinds of ecosystems depending on the type of suiface or environment. Most are naturally made 5uch as the ocean or lake and the desert or rainforest.Some are man-made or artificial to en- courage co-habitation（共居）between living and non-living things in a monitored environment,such as azoo or garden.3 Plants make up the biggest group of biological creatures within an ecosystem,and that's because they are the natural food producers for everyone.Plants raised in the earth need air and collect sunlight to help them grow.When they grow,the plants and their加its or flowers eventually become a source of food to animals,microorganisms (微生物）and even humans, of course. Food is then converted to energy for the rest of us to function,and this happens in a never-ending cycle until the living creatures die and break up back in the earth.4 Ecosystems are the basis of survival for all living things.We depend on plants and animals for food. In order for us to exist,we need to grow and care about other organisms.We also need tO care for the non一living things within our environment like our air and water so we can continue living as a population.Since plants, animals and humans are all of various species（物种）,we all play a role in maintaining the ecosystem.5 To preserve our ecosystems,we should stop using too much energy,which happens汕en we consume more than our share of resources. Humans should not disturb the natural habitat（栖息地）of plants and animals, and should allow them to grow healthily for the cycle to continue.Too many people in a habitat can mean dis- placement（搬迁）:imagine being thrown out of your home because there is no more space for everyone. Worse,overpopulation can also ruin the environment and cause destruction of existing plants and animals.In an ecosystem,plants,animals and humans live together in________.A:our share of resoureesB:a biological creatureC:a given areaD:the maintenance of the ecosystemE:the source of foodF:various species
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考题 共用题干 Ecosystem1 The word " ecosystem" is short for ecological（生态的）system. An ecosystem is where living crea- tures expand within a given area.You can say that an ecosystem is the natural environment where biologicalorganisms（生物）such as plants,animals and humans co-exist in this world. So naturally that includes you and mne.Yes,we are all members of an ecosystem!2 There are different kinds of ecosystems depending on the type of suiface or environment. Most are naturally made 5uch as the ocean or lake and the desert or rainforest.Some are man-made or artificial to en- courage co-habitation（共居）between living and non-living things in a monitored environment,such as azoo or garden.3 Plants make up the biggest group of biological creatures within an ecosystem,and that's because they are the natural food producers for everyone.Plants raised in the earth need air and collect sunlight to help them grow.When they grow,the plants and their加its or flowers eventually become a source of food to animals,microorganisms (微生物）and even humans, of course. Food is then converted to energy for the rest of us to function,and this happens in a never-ending cycle until the living creatures die and break up back in the earth.4 Ecosystems are the basis of survival for all living things.We depend on plants and animals for food. In order for us to exist,we need to grow and care about other organisms.We also need tO care for the non一living things within our environment like our air and water so we can continue living as a population.Since plants, animals and humans are all of various species（物种）,we all play a role in maintaining the ecosystem.5 To preserve our ecosystems,we should stop using too much energy,which happens汕en we consume more than our share of resources. Humans should not disturb the natural habitat（栖息地）of plants and animals, and should allow them to grow healthily for the cycle to continue.Too many people in a habitat can mean dis- placement（搬迁）:imagine being thrown out of your home because there is no more space for everyone. Worse,overpopulation can also ruin the environment and cause destruction of existing plants and animals.Plants,animals and humans are all effective in________.A:our share of resoureesB:a biological creatureC:a given areaD:the maintenance of the ecosystemE:the source of foodF:various species
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考题 共用题干 Ecosystem1 The word " ecosystem" is short for ecological（生态的）system. An ecosystem is where living crea- tures expand within a given area.You can say that an ecosystem is the natural environment where biologicalorganisms（生物）such as plants,animals and humans co-exist in this world. So naturally that includes you and mne.Yes,we are all members of an ecosystem!2 There are different kinds of ecosystems depending on the type of suiface or environment. Most are naturally made 5uch as the ocean or lake and the desert or rainforest.Some are man-made or artificial to en- courage co-habitation（共居）between living and non-living things in a monitored environment,such as azoo or garden.3 Plants make up the biggest group of biological creatures within an ecosystem,and that's because they are the natural food producers for everyone.Plants raised in the earth need air and collect sunlight to help them grow.When they grow,the plants and their加its or flowers eventually become a source of food to animals,microorganisms (微生物）and even humans, of course. Food is then converted to energy for the rest of us to function,and this happens in a never-ending cycle until the living creatures die and break up back in the earth.4 Ecosystems are the basis of survival for all living things.We depend on plants and animals for food. In order for us to exist,we need to grow and care about other organisms.We also need tO care for the non一living things within our environment like our air and water so we can continue living as a population.Since plants, animals and humans are all of various species（物种）,we all play a role in maintaining the ecosystem.5 To preserve our ecosystems,we should stop using too much energy,which happens汕en we consume more than our share of resources. Humans should not disturb the natural habitat（栖息地）of plants and animals, and should allow them to grow healthily for the cycle to continue.Too many people in a habitat can mean dis- placement（搬迁）:imagine being thrown out of your home because there is no more space for everyone. Worse,overpopulation can also ruin the environment and cause destruction of existing plants and animals.Plants are essential in an ecosystem because to other living creatures they are___.A:our share of resoureesB:a biological creatureC:a given areaD:the maintenance of the ecosystemE:the source of foodF:various species
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考题 口腔生态系（oral ecosystem）
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考题 生态系（ecosystem）
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考题 生态系统（ecosystem）
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考题 牙周生态系 periodontal ecosystem
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考题 生态系统生态学（ecosystem ecology）
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考题 名词解释题牙周生态系 periodontal ecosystem
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考题 名词解释题生态系统（ecosystem）
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考题 名词解释题口腔生态系（oral ecosystem）
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考题 名词解释题生态系（ecosystem）
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考题 名词解释题生态系统生态学（ecosystem ecology）
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