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共用题干
第三篇



Eating Meat一Less or More?



Every second in the United States alone,mnore than 250 animals are slaughtered for food,adding up to

more than 8 billion animals each year. Reducing the amount of meat in one's diet is nutritionally,environ-

mentally,and ethically beneficial.

People who eat meat usually have weaker immune systems compared to those of vegetarians.Meat has

been directly linked to diabetes,obesity,arthritis,and many other illnesses.Furthermore,meat-eaters are

at a higher risk for diseases,including cancer,and they are more likely to die from these diseases.Critics

say that a meatless diet does not provide enough nutrients,especially protein and iron.Actually,according

to A Teen's Guide to Going Vegetarian,by Judy Krizmanic,protein is found in almost every food,and iron

appears in many vegetables.Getting enough nutrients in a meat-reduced diet should not lie difficult.A 1988

study found that some of the highest pesticide residues appear in meat and eggs.Diets including more fruits

and vegetables will only make people healthier.

Some skeptics believe that there will be a shortage of food if animals are not eaten.In fact,the opposite

is true.More than 80% of the corn and 95%of the oats grown in the U.S.are fed to livestock.The world's

cattle alone consume enough food to equal the caloric needs of 8.7 billion people,more than the entire hu-

man population.One half of the water used in the Unites States also goes to livestock;250 gallons of water

produces only 1 lb.（磅）of beef. If people eat less meat and more plants,the amount of available ftod will

increase。

Many people become vegetarians I)ecause they feel that eating animals is unethical.90%of these ani-

mals are raised in confinement.Chickenls arid other birds have only about half a square foot of space each,

and since they are raised so close together,a lot of blade is used to cut off their beaks to prevent them from

pecking each other to death.Likewise,pigs that are repressed will bite each other's tails,so both their

teeth and tails are removed as soon as they are born.

Eating animals is hazardous in numerous ways.Even a slight reduction in meat intake is better than

nothing at all.Consuming less meat is beneficial to the health of animals,the health of people,and to the

health of the world.

Why does the author say reducing the amount of meat in one's diet is environmentally beneficial?
A:People who eat meat usually have weaker immune systems compared to those of vegetarians.
B:A lot of food and water are consumed in order to raise livestock.
C:90% of animals are raised in confinement.
D:Raising Animals causes most of the destruction of the nature.

参考答案

参考解析
解析：由文章第四段第一句话“Many people become vegetarians because they feel that eating ani- mals 0 is unethical.”可知，选A。

由文章第二段中“…according to A Teen 's Guide to Going Vegetarian, by Judy Krizmanic, protein is found in almost every food,and iron appears in many vegetables.”可知，选C。

文章第三段提到大量的粮食和水用于饲养肉食动物，暗示饲养肉食动物对资源的浪 费。由此可以推断出，作者认为少吃肉对环境有利。故选B。

由于每段都提到了吃肉的坏处，所以说作者的杰度是否定的。

第一段和最后一段互相呼应，中间段落也紧扣文章主题，根据内容可以推断文章主题 就是少吃肉的好处。故选A。
更多 “共用题干第三篇 Eating Meat一Less or More? Every second in the United States alone,mnore than 250 animals are slaughtered for food,adding up to more than 8 billion animals each year. Reducing the amount of meat in ones diet is nutritionally,environ- mentally,and ethically beneficial. People who eat meat usually have weaker immune systems compared to those of vegetarians.Meat has been directly linked to diabetes,obesity,arthritis,and many other illnesses.Furthermore,meat-eaters are at a higher risk for diseases,including cancer,and they are more likely to die from these diseases.Critics say that a meatless diet does not provide enough nutrients,especially protein and iron.Actually,according to A Teens Guide to Going Vegetarian,by Judy Krizmanic,protein is found in almost every food,and iron appears in many vegetables.Getting enough nutrients in a meat-reduced diet should not lie difficult.A 1988 study found that some of the highest pesticide residues appear in meat and eggs.Diets including more fruits and vegetables will only make people healthier. Some skeptics believe that there will be a shortage of food if animals are not eaten.In fact,the opposite is true.More than 80% of the corn and 95%of the oats grown in the U.S.are fed to livestock.The worlds cattle alone consume enough food to equal the caloric needs of 8.7 billion people,more than the entire hu- man population.One half of the water used in the Unites States also goes to livestock;250 gallons of water produces only 1 lb.（磅）of beef. If people eat less meat and more plants,the amount of available ftod will increase。 Many people become vegetarians I)ecause they feel that eating animals is unethical.90%of these ani- mals are raised in confinement.Chickenls arid other birds have only about half a square foot of space each, and since they are raised so close together,a lot of blade is used to cut off their beaks to prevent them from pecking each other to death.Likewise,pigs that are repressed will bite each others tails,so both their teeth and tails are removed as soon as they are born. Eating animals is hazardous in numerous ways.Even a slight reduction in meat intake is better than nothing at all.Consuming less meat is beneficial to the health of animals,the health of people,and to the health of the world.Why does the author say reducing the amount of meat in one's diet is environmentally beneficial?A:People who eat meat usually have weaker immune systems compared to those of vegetarians.B:A lot of food and water are consumed in order to raise livestock. C:90% of animals are raised in confinement.D:Raising Animals causes most of the destruction of the nature.” 相关考题
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考题 共用题干第三篇 Eating Meat一Less or More? Every second in the United States alone,mnore than 250 animals are slaughtered for food,adding up to more than 8 billion animals each year. Reducing the amount of meat in ones diet is nutritionally,environ- mentally,and ethically beneficial. People who eat meat usually have weaker immune systems compared to those of vegetarians.Meat has been directly linked to diabetes,obesity,arthritis,and many other illnesses.Furthermore,meat-eaters are at a higher risk for diseases,including cancer,and they are more likely to die from these diseases.Critics say that a meatless diet does not provide enough nutrients,especially protein and iron.Actually,according to A Teens Guide to Going Vegetarian,by Judy Krizmanic,protein is found in almost every food,and iron appears in many vegetables.Getting enough nutrients in a meat-reduced diet should not lie difficult.A 1988 study found that some of the highest pesticide residues appear in meat and eggs.Diets including more fruits and vegetables will only make people healthier. Some skeptics believe that there will be a shortage of food if animals are not eaten.In fact,the opposite is true.More than 80% of the corn and 95%of the oats grown in the U.S.are fed to livestock.The worlds cattle alone consume enough food to equal the caloric needs of 8.7 billion people,more than the entire hu- man population.One half of the water used in the Unites States also goes to livestock;250 gallons of water produces only 1 lb.（磅）of beef. If people eat less meat and more plants,the amount of available ftod will increase。 Many people become vegetarians I)ecause they feel that eating animals is unethical.90%of these ani- mals are raised in confinement.Chickenls arid other birds have only about half a square foot of space each, and since they are raised so close together,a lot of blade is used to cut off their beaks to prevent them from pecking each other to death.Likewise,pigs that are repressed will bite each others tails,so both their teeth and tails are removed as soon as they are born. Eating animals is hazardous in numerous ways.Even a slight reduction in meat intake is better than nothing at all.Consuming less meat is beneficial to the health of animals,the health of people,and to the health of the world.Which of the following can be the best title of the passage?A:The Advantage of Eating Less Meat.B:Why People Become Vegetarian?C:Environmental Protection and Meatless Diet,D:Save Chickens,Save Birds.
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考题 共用题干第三篇 Eating Meat一Less or More? Every second in the United States alone,mnore than 250 animals are slaughtered for food,adding up to more than 8 billion animals each year. Reducing the amount of meat in ones diet is nutritionally,environ- mentally,and ethically beneficial. People who eat meat usually have weaker immune systems compared to those of vegetarians.Meat has been directly linked to diabetes,obesity,arthritis,and many other illnesses.Furthermore,meat-eaters are at a higher risk for diseases,including cancer,and they are more likely to die from these diseases.Critics say that a meatless diet does not provide enough nutrients,especially protein and iron.Actually,according to A Teens Guide to Going Vegetarian,by Judy Krizmanic,protein is found in almost every food,and iron appears in many vegetables.Getting enough nutrients in a meat-reduced diet should not lie difficult.A 1988 study found that some of the highest pesticide residues appear in meat and eggs.Diets including more fruits and vegetables will only make people healthier. Some skeptics believe that there will be a shortage of food if animals are not eaten.In fact,the opposite is true.More than 80% of the corn and 95%of the oats grown in the U.S.are fed to livestock.The worlds cattle alone consume enough food to equal the caloric needs of 8.7 billion people,more than the entire hu- man population.One half of the water used in the Unites States also goes to livestock;250 gallons of water produces only 1 lb.（磅）of beef. If people eat less meat and more plants,the amount of available ftod will increase。 Many people become vegetarians I)ecause they feel that eating animals is unethical.90%of these ani- mals are raised in confinement.Chickenls arid other birds have only about half a square foot of space each, and since they are raised so close together,a lot of blade is used to cut off their beaks to prevent them from pecking each other to death.Likewise,pigs that are repressed will bite each others tails,so both their teeth and tails are removed as soon as they are born. Eating animals is hazardous in numerous ways.Even a slight reduction in meat intake is better than nothing at all.Consuming less meat is beneficial to the health of animals,the health of people,and to the health of the world.Which of the following statements is true according to the book A Teen's Guide to Going Vegetarian?A:Some of the highest pesticide residues appear in meat and eggs.B:A meatless diet does not provide enough nutrients.C:Protein can be found in almost every food.D:More than 80%of the corn in the U.S.are fed to livestock.
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考题 共用题干 Eating Meat-Less or More? Every second in the United States alone,more than 250 animals are slaughtered for food,adding up to more than 8 billion animals each year.Reducing the amount of meat in one's diet is nutritionally, environmentally,and ethically beneficial, People who eat meat usually have weaker immune systems compared to those of vegetarians.Meat has been directly linked to diabetes,obesity,arthritis,and many other illnesses.Furthermore,meat-eaters are at a higher risk for diseases,including cancer,and they are more likely to die from these diseases.Critics say that a meatless diet does not provide enough nutrients,especially protein and iron.Actually,according to A Teen’s Guide to Going Vegetarian,by Judy Krizmanic,proteil1 is found in almost every food,and iron appears in many vegetables.Getting enough nutrients in a meat-reduced diet should not be difficult.A 1988 study found that some of the highest pesticide residues appear in meat and eggs.Diets including more fruits and vegetables will only make people healthier. Some skeptics believe that there will be a shortage of food if animals are not eaten.In fact,the opposite is true.More than 80% of the corn and 95% of the oats grown in the U.S.are fed to livestock.The world's cattle alone consume enough food to equal the caloric needs of 8.7 billion people,more than the entire human population.One half of the water used in the Unites States also goes to livestock;250 gallons of water produces only 1 lb.（磅）of beef.If people eat less meat and more plants,the amount of available food will increase。 Many people become vegetarians because they feel that eating animals is unethical.90% of these animals are raised in confinement.Chickens and other birds have only about half a square foot of space each,and since they are raised so close together,a lot of blade is used to cut off their beaks to prevent them from pecking each other to death.Likewise,pigs that are repressed will bite each other's tails,so both their teeth and tails are removed as soon as they are born. Eating animals is hazardous in numerous ways.Even a slight reduction in meat intake is better than nothing at all.Consuming less meat is beneficial to the health of animals,the health of people,and to the health of the world.What is the attitude the author has toward eating meat?A:Positive. B:Negative.C:Indifferent. D:None of the above.
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考题 共用题干 Eating Meat-Less or More? Every second in the United States alone,more than 250 animals are slaughtered for food,adding up to more than 8 billion animals each year.Reducing the amount of meat in one's diet is nutritionally, environmentally,and ethically beneficial, People who eat meat usually have weaker immune systems compared to those of vegetarians.Meat has been directly linked to diabetes,obesity,arthritis,and many other illnesses.Furthermore,meat-eaters are at a higher risk for diseases,including cancer,and they are more likely to die from these diseases.Critics say that a meatless diet does not provide enough nutrients,especially protein and iron.Actually,according to A Teen’s Guide to Going Vegetarian,by Judy Krizmanic,proteil1 is found in almost every food,and iron appears in many vegetables.Getting enough nutrients in a meat-reduced diet should not be difficult.A 1988 study found that some of the highest pesticide residues appear in meat and eggs.Diets including more fruits and vegetables will only make people healthier. Some skeptics believe that there will be a shortage of food if animals are not eaten.In fact,the opposite is true.More than 80% of the corn and 95% of the oats grown in the U.S.are fed to livestock.The world's cattle alone consume enough food to equal the caloric needs of 8.7 billion people,more than the entire human population.One half of the water used in the Unites States also goes to livestock;250 gallons of water produces only 1 lb.（磅）of beef.If people eat less meat and more plants,the amount of available food will increase。 Many people become vegetarians because they feel that eating animals is unethical.90% of these animals are raised in confinement.Chickens and other birds have only about half a square foot of space each,and since they are raised so close together,a lot of blade is used to cut off their beaks to prevent them from pecking each other to death.Likewise,pigs that are repressed will bite each other's tails,so both their teeth and tails are removed as soon as they are born. Eating animals is hazardous in numerous ways.Even a slight reduction in meat intake is better than nothing at all.Consuming less meat is beneficial to the health of animals,the health of people,and to the health of the world.Why do some people become vegetarians?A:They feel that eating animals is unethical.B:There are fewer livestock available due to the environmental pollution.C:The consumption of meat will lead to financial problem.D:Being a vegetarian is beneficial to the protection of water.
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考题 共用题干第三篇 Eating Meat一Less or More? Every second in the United States alone,mnore than 250 animals are slaughtered for food,adding up to more than 8 billion animals each year. Reducing the amount of meat in ones diet is nutritionally,environ- mentally,and ethically beneficial. People who eat meat usually have weaker immune systems compared to those of vegetarians.Meat has been directly linked to diabetes,obesity,arthritis,and many other illnesses.Furthermore,meat-eaters are at a higher risk for diseases,including cancer,and they are more likely to die from these diseases.Critics say that a meatless diet does not provide enough nutrients,especially protein and iron.Actually,according to A Teens Guide to Going Vegetarian,by Judy Krizmanic,protein is found in almost every food,and iron appears in many vegetables.Getting enough nutrients in a meat-reduced diet should not lie difficult.A 1988 study found that some of the highest pesticide residues appear in meat and eggs.Diets including more fruits and vegetables will only make people healthier. Some skeptics believe that there will be a shortage of food if animals are not eaten.In fact,the opposite is true.More than 80% of the corn and 95%of the oats grown in the U.S.are fed to livestock.The worlds cattle alone consume enough food to equal the caloric needs of 8.7 billion people,more than the entire hu- man population.One half of the water used in the Unites States also goes to livestock;250 gallons of water produces only 1 lb.（磅）of beef. If people eat less meat and more plants,the amount of available ftod will increase。 Many people become vegetarians I)ecause they feel that eating animals is unethical.90%of these ani- mals are raised in confinement.Chickenls arid other birds have only about half a square foot of space each, and since they are raised so close together,a lot of blade is used to cut off their beaks to prevent them from pecking each other to death.Likewise,pigs that are repressed will bite each others tails,so both their teeth and tails are removed as soon as they are born. Eating animals is hazardous in numerous ways.Even a slight reduction in meat intake is better than nothing at all.Consuming less meat is beneficial to the health of animals,the health of people,and to the health of the world.What is the attitude the author has toward eating meat?A:Positive.B:Negative.C:Indifferent.D:None of the above.
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考题 共用题干 Eating Meat-Less or More? Every second in the United States alone,more than 250 animals are slaughtered for food,adding up to more than 8 billion animals each year.Reducing the amount of meat in one's diet is nutritionally, environmentally,and ethically beneficial, People who eat meat usually have weaker immune systems compared to those of vegetarians.Meat has been directly linked to diabetes,obesity,arthritis,and many other illnesses.Furthermore,meat-eaters are at a higher risk for diseases,including cancer,and they are more likely to die from these diseases.Critics say that a meatless diet does not provide enough nutrients,especially protein and iron.Actually,according to A Teen’s Guide to Going Vegetarian,by Judy Krizmanic,proteil1 is found in almost every food,and iron appears in many vegetables.Getting enough nutrients in a meat-reduced diet should not be difficult.A 1988 study found that some of the highest pesticide residues appear in meat and eggs.Diets including more fruits and vegetables will only make people healthier. Some skeptics believe that there will be a shortage of food if animals are not eaten.In fact,the opposite is true.More than 80% of the corn and 95% of the oats grown in the U.S.are fed to livestock.The world's cattle alone consume enough food to equal the caloric needs of 8.7 billion people,more than the entire human population.One half of the water used in the Unites States also goes to livestock;250 gallons of water produces only 1 lb.（磅）of beef.If people eat less meat and more plants,the amount of available food will increase。 Many people become vegetarians because they feel that eating animals is unethical.90% of these animals are raised in confinement.Chickens and other birds have only about half a square foot of space each,and since they are raised so close together,a lot of blade is used to cut off their beaks to prevent them from pecking each other to death.Likewise,pigs that are repressed will bite each other's tails,so both their teeth and tails are removed as soon as they are born. Eating animals is hazardous in numerous ways.Even a slight reduction in meat intake is better than nothing at all.Consuming less meat is beneficial to the health of animals,the health of people,and to the health of the world.Which of the following statements is true according to the book A Teen’s Guide to Going Vegetarian?A:Some of the highest pesticide residues appear in meat and eggs,B:A meatless diet does not provide enough nutrients.C:Protein can be found in almost every food,D:More than 80% of the corn in the U.S.are fed to livestock.
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考题 共用题干第三篇 Eating Meat一Less or More? Every second in the United States alone,mnore than 250 animals are slaughtered for food,adding up to more than 8 billion animals each year. Reducing the amount of meat in ones diet is nutritionally,environ- mentally,and ethically beneficial. People who eat meat usually have weaker immune systems compared to those of vegetarians.Meat has been directly linked to diabetes,obesity,arthritis,and many other illnesses.Furthermore,meat-eaters are at a higher risk for diseases,including cancer,and they are more likely to die from these diseases.Critics say that a meatless diet does not provide enough nutrients,especially protein and iron.Actually,according to A Teens Guide to Going Vegetarian,by Judy Krizmanic,protein is found in almost every food,and iron appears in many vegetables.Getting enough nutrients in a meat-reduced diet should not lie difficult.A 1988 study found that some of the highest pesticide residues appear in meat and eggs.Diets including more fruits and vegetables will only make people healthier. Some skeptics believe that there will be a shortage of food if animals are not eaten.In fact,the opposite is true.More than 80% of the corn and 95%of the oats grown in the U.S.are fed to livestock.The worlds cattle alone consume enough food to equal the caloric needs of 8.7 billion people,more than the entire hu- man population.One half of the water used in the Unites States also goes to livestock;250 gallons of water produces only 1 lb.（磅）of beef. If people eat less meat and more plants,the amount of available ftod will increase。 Many people become vegetarians I)ecause they feel that eating animals is unethical.90%of these ani- mals are raised in confinement.Chickenls arid other birds have only about half a square foot of space each, and since they are raised so close together,a lot of blade is used to cut off their beaks to prevent them from pecking each other to death.Likewise,pigs that are repressed will bite each others tails,so both their teeth and tails are removed as soon as they are born. Eating animals is hazardous in numerous ways.Even a slight reduction in meat intake is better than nothing at all.Consuming less meat is beneficial to the health of animals,the health of people,and to the health of the world.Why do some people become vegetarians?A:They feel that eating animals is unethical.B:There are fewer livestock available due to the environmental pollution.C:The consumption of meat will lead to financial problem.D:Being a vegetarian is beneficial to the protection of water.
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考题 共用题干 Eating Meat-Less or More? Every second in the United States alone,more than 250 animals are slaughtered for food,adding up to more than 8 billion animals each year.Reducing the amount of meat in one's diet is nutritionally, environmentally,and ethically beneficial, People who eat meat usually have weaker immune systems compared to those of vegetarians.Meat has been directly linked to diabetes,obesity,arthritis,and many other illnesses.Furthermore,meat-eaters are at a higher risk for diseases,including cancer,and they are more likely to die from these diseases.Critics say that a meatless diet does not provide enough nutrients,especially protein and iron.Actually,according to A Teen’s Guide to Going Vegetarian,by Judy Krizmanic,proteil1 is found in almost every food,and iron appears in many vegetables.Getting enough nutrients in a meat-reduced diet should not be difficult.A 1988 study found that some of the highest pesticide residues appear in meat and eggs.Diets including more fruits and vegetables will only make people healthier. Some skeptics believe that there will be a shortage of food if animals are not eaten.In fact,the opposite is true.More than 80% of the corn and 95% of the oats grown in the U.S.are fed to livestock.The world's cattle alone consume enough food to equal the caloric needs of 8.7 billion people,more than the entire human population.One half of the water used in the Unites States also goes to livestock;250 gallons of water produces only 1 lb.（磅）of beef.If people eat less meat and more plants,the amount of available food will increase。 Many people become vegetarians because they feel that eating animals is unethical.90% of these animals are raised in confinement.Chickens and other birds have only about half a square foot of space each,and since they are raised so close together,a lot of blade is used to cut off their beaks to prevent them from pecking each other to death.Likewise,pigs that are repressed will bite each other's tails,so both their teeth and tails are removed as soon as they are born. Eating animals is hazardous in numerous ways.Even a slight reduction in meat intake is better than nothing at all.Consuming less meat is beneficial to the health of animals,the health of people,and to the health of the world.Why does the author say reducing the amount of meat in one's diet is environmentally beneficial?A:People who eat meat usually have weaker immune systems compared to those of vegetarians.B:A lot of food and water are consumed in order to raise livestock.C:90% of animals are raised in confinement.D:Raising Animals causes most of the destruction of the nature.
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考题 共用题干 Eating Meat-Less or More? Every second in the United States alone,more than 250 animals are slaughtered for food,adding up to more than 8 billion animals each year.Reducing the amount of meat in one's diet is nutritionally, environmentally,and ethically beneficial, People who eat meat usually have weaker immune systems compared to those of vegetarians.Meat has been directly linked to diabetes,obesity,arthritis,and many other illnesses.Furthermore,meat-eaters are at a higher risk for diseases,including cancer,and they are more likely to die from these diseases.Critics say that a meatless diet does not provide enough nutrients,especially protein and iron.Actually,according to A Teen’s Guide to Going Vegetarian,by Judy Krizmanic,proteil1 is found in almost every food,and iron appears in many vegetables.Getting enough nutrients in a meat-reduced diet should not be difficult.A 1988 study found that some of the highest pesticide residues appear in meat and eggs.Diets including more fruits and vegetables will only make people healthier. Some skeptics believe that there will be a shortage of food if animals are not eaten.In fact,the opposite is true.More than 80% of the corn and 95% of the oats grown in the U.S.are fed to livestock.The world's cattle alone consume enough food to equal the caloric needs of 8.7 billion people,more than the entire human population.One half of the water used in the Unites States also goes to livestock;250 gallons of water produces only 1 lb.（磅）of beef.If people eat less meat and more plants,the amount of available food will increase。 Many people become vegetarians because they feel that eating animals is unethical.90% of these animals are raised in confinement.Chickens and other birds have only about half a square foot of space each,and since they are raised so close together,a lot of blade is used to cut off their beaks to prevent them from pecking each other to death.Likewise,pigs that are repressed will bite each other's tails,so both their teeth and tails are removed as soon as they are born. Eating animals is hazardous in numerous ways.Even a slight reduction in meat intake is better than nothing at all.Consuming less meat is beneficial to the health of animals,the health of people,and to the health of the world.Which of the following can be the best title of the passage?A:The Advantage of Eating Less Meat.B:Why People Become Vegetarians?C:Environmental Protection and Meatless Diet.D:Save Chickens,Save Birds.
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考题 共用题干 第三篇Eat More, Weigh Less, Live LongerClever genetic detective work may have found out the reason why a near-starvation diet prolonas the life of many animals.Ronald Kahn at Harvard Medical School in Boston,U.S.,and his colleagues navebeen able to extend the lifespan（寿命）of mice by 18 per cent by blocking the rodent's(啮齿动物）increase of fat in specific cells.This suggests that thinness一and not necessarily diet一Iromotes lonq life in"calorie（热量卡）restricted" animals."It's very cool work",says aging researche:Cynthia Kenyon of the University ot California, San Francisc."These mice eat all they want, lose weight and live longer.It's like heaven."Calorie restriction dramatically extends the lifespan of organisms as different as worms and rodents.Whether this works in humans is still unknown,partly because few people are willina to submit to such a strict diet.But many researchers hope they will be able to trigger the same effect with a drug once they understand how less food leads to a longer life.One theory is that eating less reduces the increase of harmful things that can damage cells.But Kahn's team wondered whether the animals simply benefit by becoming thin.To find out, they used biology tricks to disrupt the insulin（胰岛素）receptor (受体)gene in lab mice一but only in their fat cells."Since insulin is needed to help fat cells storefat ,these animals were protected against becoming fat,"explains Kahn.This slight genetic change in a single tissue had dramatic effects.By three months of age.Kahn's modified mice had up to 70 per cent less body fat than normal control mice,despite the fact that they ate 55 per cent more food per gram of body weight.In addition ,their lifespan increased.The average control mouse lived 753 days,while the thin rodents averaged a lifespan of 887 days.After three years,all the control mice had died.but one-quarter of the modified rodents were still alive."That they ciet these effects by just manipulating the fat cells is controversial,"saysLeonard Guarente of the Massachusetts Institute of Technology,who studies calorie restriction and aging.But Guarente says Kahn has yet to prove that the same effect is responsible forincreased lifespan in calorie-restricted animals."It might be the same effect or there might be two routes to long life,"he points out,"and that would be very interesting." What can be inferred from the passage about the route to long life?A:It remains to be studied.B:It has already been discovered.C:Eating more leads to long life.D:Eating less leads to long life.
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考题 共用题干 More Than 8 Hours Sleep Too Much of a Good ThingAlthough the dangers of too little sleep are widely known,new research suggests that people who sleep too much may also suffer the consequences.Investigators at the University of California in San Diego found that people who clock up 9 or 10 hours each weeknight appear to have more trouble falling and staying asleep,as well as a number of other sleep problems,than people who sleep 8 hours a night. People who slept only 7 hours each night also said they had more trouble falling asleep and feeling refreshed after a night's sleep than 8-hour sleepers.These findings,which DL Daniel Kripke reported in the journal Psychosomatic Medicine, demonstrate that people who want to get a good night's rest may not need to set aside more than 8 hours a night. He added that it might be a good idea for people who sleep more than 8 hours each night to consider reducing the amount of time they spend in bed,but cautioned that more research is needed to confirm this.Previous studies have shown the potential dangers of chronic shortages of sleep,for instance, one report demonstrated that people who habitually sleep less than 7 hours each night have a higher risk of dying within a fixed period than people who sleep more.For the current report,Kripke reviewed the responses of 1,004 adults to sleep questionnaires,in which participants indicated how much they slept during the week and whether they experienced any sleep problems.Sleep problems included waking in the middle of the night,arising early in the morning and being unable to fall back to sleep,and having fatigue interfere with day-to-day functioning.Kripke found that people who slept between 9 and 10 hours each night were more likely to report experiencing each sleep problem than people who slept 8 hours.In an interview,Kripke noted that long sleepers may struggle to get rest at night simply because they spend too much time in bed. As evidence,he added that one way to help insomnia is to spend less time in bed."It stands to reason that if a person spends too long a time in bed,then they'll spend a higher percentage of time awake,"he said.To get a good night's rest,people may not need to______.A:fall asleep againB:become more energetic the following dayC:sleep less than 7 hoursD:confirm those serious consequencesE:suffer sleep problemsF: sleep more than 8 hours
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考题 共用题干 More Than 8 Hours Sleep Too Much of a Good ThingAlthough the dangers of too little sleep are widely known,new research suggests that people who sleep too much may also suffer the consequences.Investigators at the University of California in San Diego found that people who clock up 9 or 10 hours each weeknight appear to have more trouble falling and staying asleep,as well as a number of other sleep problems,than people who sleep 8 hours a night. People who slept only 7 hours each night also said they had more trouble falling asleep and feeling refreshed after a night's sleep than 8-hour sleepers.These findings,which DL Daniel Kripke reported in the journal Psychosomatic Medicine, demonstrate that people who want to get a good night's rest may not need to set aside more than 8 hours a night. He added that it might be a good idea for people who sleep more than 8 hours each night to consider reducing the amount of time they spend in bed,but cautioned that more research is needed to confirm this.Previous studies have shown the potential dangers of chronic shortages of sleep,for instance, one report demonstrated that people who habitually sleep less than 7 hours each night have a higher risk of dying within a fixed period than people who sleep more.For the current report,Kripke reviewed the responses of 1,004 adults to sleep questionnaires,in which participants indicated how much they slept during the week and whether they experienced any sleep problems.Sleep problems included waking in the middle of the night,arising early in the morning and being unable to fall back to sleep,and having fatigue interfere with day-to-day functioning.Kripke found that people who slept between 9 and 10 hours each night were more likely to report experiencing each sleep problem than people who slept 8 hours.In an interview,Kripke noted that long sleepers may struggle to get rest at night simply because they spend too much time in bed. As evidence,he added that one way to help insomnia is to spend less time in bed."It stands to reason that if a person spends too long a time in bed,then they'll spend a higher percentage of time awake,"he said.One survey showed that people who habitually______each night have a higher risk of dying.A:fall asleep againB:become more energetic the following dayC:sleep less than 7 hoursD:confirm those serious consequencesE:suffer sleep problemsF: sleep more than 8 hours
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考题 共用题干 More Than 8 Hours Sleep Too Much of a Good ThingAlthough the dangers of too little sleep are widely known,new research suggests that people who sleep too much may also suffer the consequences.Investigators at the University of California in San Diego found that people who clock up 9 or 10 hours each weeknight appear to have more trouble falling and staying asleep,as well as a number of other sleep problems,than people who sleep 8 hours a night. People who slept only 7 hours each night also said they had more trouble falling asleep and feeling refreshed after a night's sleep than 8-hour sleepers.These findings,which DL Daniel Kripke reported in the journal Psychosomatic Medicine, demonstrate that people who want to get a good night's rest may not need to set aside more than 8 hours a night. He added that it might be a good idea for people who sleep more than 8 hours each night to consider reducing the amount of time they spend in bed,but cautioned that more research is needed to confirm this.Previous studies have shown the potential dangers of chronic shortages of sleep,for instance, one report demonstrated that people who habitually sleep less than 7 hours each night have a higher risk of dying within a fixed period than people who sleep more.For the current report,Kripke reviewed the responses of 1,004 adults to sleep questionnaires,in which participants indicated how much they slept during the week and whether they experienced any sleep problems.Sleep problems included waking in the middle of the night,arising early in the morning and being unable to fall back to sleep,and having fatigue interfere with day-to-day functioning.Kripke found that people who slept between 9 and 10 hours each night were more likely to report experiencing each sleep problem than people who slept 8 hours.In an interview,Kripke noted that long sleepers may struggle to get rest at night simply because they spend too much time in bed. As evidence,he added that one way to help insomnia is to spend less time in bed."It stands to reason that if a person spends too long a time in bed,then they'll spend a higher percentage of time awake,"he said.Long sleepers are reported to be more likely to______.A:fall asleep againB:become more energetic the following dayC:sleep less than 7 hoursD:confirm those serious consequencesE:suffer sleep problemsF: sleep more than 8 hours
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考题 单选题The speaker of the passage is of the opinion that ______.A protecting the farmland is more important than protecting wild animalB protecting endangered species is more important than protecting the interests of the farmersC protecting the farmland and the wild animals are equally importantD one can rely more on bees than mice to frighten beasts off the farm
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考题 问答题Water is vital for our survival and for producing food. It takes about a thousand tons of water to produce one tone of grain that, fed to cows, produces only 18 pounds of meat. Today mankind is using about 160 billion tons more water each year than is being replenished by rain and fed back into water storages. If this water were carried in water trucks, it would require a 300, 000-mile-long convoy of trucks every day—a convoy length 37 times the diameter of the Earth. This is how much water we are using and not replenishing.
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