单选题Fevers cause ______.A prostaglandins to be formedB iron to be made available to bacteriaC leukocytes to be more mobileD lizards to be cold-blooded animals

考题 This bridge ( ) iron. A、is made ofB、is made fromC、is made by

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考题 As research techniques become more______(advance)，the number of animals used in experiments may decrease，but stopping testing on animals altogether is a long way away.

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考题 Modern zoos are very different from zoos that were built fifty years ago.At that time, zoos were places (1) people could go to see animals from many parts of the world.They animals lived in cages that were made (2) Concrete with iron bars, cages that were easy to keep clean.Unfortunately for the animals, the cages were small and impossible to hide in.the zoos environment was anything (3) natural.Al though the zoo keepers took good care of the animals and fed them well, many of the animals did not thrive: they behaved in strange ways, and they often became illIn modern zoos, people can see animals in more natural habitats.The animals are(4)more freedom in large areas so that they can live more comfortably as they would in nature Even the appearance of zoos has changed, trees and grass grow in the cages, and streams of water flow (5) the areas that animals live in.(完型填空)A.OfB.ButC.WhereD.OverE.Given

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考题 A radio medical advice service ______ ships of all nationalities and no charge is made for this service．A.is available toB.is available forC.are available toD.are available for

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考题 The food we eat seems to have profound effects on our health.Although science has made enormous steps in making food more fit to eat ,it has, at the same time,made many foods unfit to eat. Some research has shown that perhaps eighty percent of all human illnesses are related to diet and forty percent of cancer is related to the diet as well,especially cancer of the colon. Different cultures are more likely to cause certain different illnesses because of the food that is characteristic in these cultures. That food is related to illness is nto a new discovery. In 1945, about 35 years ago, government researchers realized that nitrates, commonly used to preserve color in meats,and other food additives,caused cancer. Yet, these carcinogenic additives remain in our food, and it becomes more difficult all the time to know which things on the packaging labels of processed food are helpful or harmful. The additives which we eat are not all so direct. Farmers often give penicillin to beef and living animals, and because of this ,penicillin has been found in the milk of treated cow. Sometimes similar drugs are given to animals not for medical purposes,but for financial reasons. The farmers are simply trying to fatten the animals in order to obtain a higher price on the market. Although the Food and Drug Administration(FDA) has tried repeatedly to control these procedures, the practices continue. What are nitrates used for? a.They preserve flavor in packaged foods. b.They preserve the color of meats. c.They are the objects of research. d.They cause the animals to become fatter.

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考题 The food we eat seems to have profound effects on our health.Although science has made enormous steps in making food more fit to eat ,it has, at the same time,made many foods unfit to eat. Some research has shown that perhaps eighty percent of all human illnesses are related to diet and forty percent of cancer is related to the diet as well,especially cancer of the colon. Different cultures are more likely to cause certain different illnesses because of the food that is characteristic in these cultures. That food is related to illness is nto a new discovery. In 1945, about 35 years ago, government researchers realized that nitrates, commonly used to preserve color in meats,and other food additives,caused cancer. Yet, these carcinogenic additives remain in our food, and it becomes more difficult all the time to know which things on the packaging labels of processed food are helpful or harmful. The additives which we eat are not all so direct. Farmers often give penicillin to beef and living animals, and because of this ,penicillin has been found in the milk of treated cow. Sometimes similar drugs are given to animals not for medical purposes,but for financial reasons. The farmers are simply trying to fatten the animals in order to obtain a higher price on the market. Although the Food and Drug Administration(FDA) has tried repeatedly to control these procedures, the practices continue. Which of the following statements is NOT ture? a.Drugs are always given to animals for medical reasons b.Some of the additives in our food are added to the food itself and some are given to the living animals c.Researchers have known about the potential dangers of food additives for over thirty-five years. d.Food may cause forty percent of cancer in world.

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考题 The food we eat seems to have profound effects on our health.Although science has made enormous steps in making food more fit to eat ,it has, at the same time,made many foods unfit to eat. Some research has shown that perhaps eighty percent of all human illnesses are related to diet and forty percent of cancer is related to the diet as well,especially cancer of the colon. Different cultures are more likely to cause certain different illnesses because of the food that is characteristic in these cultures. That food is related to illness is nto a new discovery. In 1945, about 35 years ago, government researchers realized that nitrates, commonly used to preserve color in meats,and other food additives,caused cancer. Yet, these carcinogenic additives remain in our food, and it becomes more difficult all the time to know which things on the packaging labels of processed food are helpful or harmful. The additives which we eat are not all so direct. Farmers often give penicillin to beef and living animals, and because of this ,penicillin has been found in the milk of treated cow. Sometimes similar drugs are given to animals not for medical purposes,but for financial reasons. The farmers are simply trying to fatten the animals in order to obtain a higher price on the market. Although the Food and Drug Administration(FDA) has tried repeatedly to control these procedures, the practices continue. The word 'carcinogenic' most nearly means '___'.a.trouble-making b.color-retaining c.money-making d.cancer-causing

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考题 Passage 2 The food we eat seems to have profound effects on our health. Although science has made enormous steps in making food more fit to eat, it has, at the same time, made many foods unfit to eat. some research has shown that perhaps eighty percent of all human illness are related to diet and forty percent of cancer is related to the diet as well, especially cancer of the colon. Different cultures are more prone to contract certain illness because of the food that is characteristic in these cultures. That food related to illness is not a new discovery. In 1945, government researchers realized that nitrates and nitrites, commonly used to preserve color in meats, and other food additives, caused cancer. Yet, these carcinogenic additives remain in our food, and it becomes more difficult all the time to know which things on the packaging labels of processed food are helpful or harmful. The additives which we eat are not all so direct. Farmers often give penicillin to beef and poultry, and because of this, penicillin has been found in the milk of treated cow. Sometimes similar drugs are administered to animals not for medicinal purposes, but for financial reasons. The farmers are simply trying to fatten the animals in order to obtain a higher price on the market. Although the Food and Drug Administration （FDA） has tried repeatedly to control these procedures, the practices continue. Why do farmers give drugs to their animals? A. To speed up the growth of animals. B. To make the animals fatter. C. To make the animals' meat fit to eat. D. To make the animals' meat rich in nutrients.

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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 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 The food we eat seems to have profound effects on our health.Although science has made enormous steps in making food more fit to eat ,it has, at the same time,made many foods unfit to eat. Some research has shown that perhaps eighty percent of all human illnesses are related to diet and forty percent of cancer is related to the diet as well,especially cancer of the colon. Different cultures are more likely to cause certain different illnesses because of the food that is characteristic in these cultures. That food is related to illness is nto a new discovery. In 1945, about 35 years ago, government researchers realized that nitrates, commonly used to preserve color in meats,and other food additives,caused cancer. Yet, these carcinogenic additives remain in our food, and it becomes more difficult all the time to know which things on the packaging labels of processed food are helpful or harmful. The additives which we eat are not all so direct. Farmers often give penicillin to beef and living animals, and because of this ,penicillin has been found in the milk of treated cow. Sometimes similar drugs are given to animals not for medical purposes,but for financial reasons. The farmers are simply trying to fatten the animals in order to obtain a higher price on the market. Although the Food and Drug Administration(FDA) has tried repeatedly to control these procedures, the practices continue. Which of the following statements is NOT ture?（）A、Drugs are always given to animals for medical reasonsB、Some of the additives in our food are added to the food itself and some are given to the living animalsC、Researchers have known about the potential dangers of food additives for over thirty-five years.D、Food may cause forty percent of cancer in world.

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考题单选题Which one of the following most seriously undermines the conclusion of this argument?A The increasing amount of recycled material made available each year is equal to one-tenth of the increasing amount of natural material consumed annually.B Recent studies have shown that the number of endangered animals throughout the world fluctuates sharply and is chiefly determined by changes in meteorological conditions.C The logging industry contributes huge sums of money to political campaigns instates where it has a financial interest.D The techniques that make recycling possible are constantly improved so that more is reclaimed for lower costs each year.E Political contributions by the recycling industry are now greater than those of either the logging or animal protection interests.

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考题单选题Skilled blacksmiths who could forge useful items out of it on used to play a central role in American life. The onset of industrialization and the mass production of iron products, however, have made the blacksmith’s traditional role mostly obsolete. Still, there will always be a job available for a good blacksmith.　 Which of the following, if true, provides the most support for the conclusion that a job will always be available for a good blacksmith?A Many people are willing to pay considerably more for tools hand-crafted by a blacksmith than for tools created by a machine.B Blacksmiths cannot produce iron products with the speed or consistency of machines.C Blacksmiths traditionally apprenticed to a master blacksmith for seven or more years before entering business independently.D The cowboy never would have conquered the West without the horseshoes crafted by blacksmiths.E As skilled craftsmen, blacksmiths traditionally served as community leaders throughout North America and Europe.

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考题单选题The passage implies that ______.A the fever process is widespread because moderate fevers have benefitsB the reduction of fevers can inhibit bacterial growthC man can use sun lamp to raise lizards’ temperatureD Crayfish injected with bacteria have a purpose for moving to hot areas

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考题单选题Which of the following statements is true?A Developing fever is the privilege of warm-blooded animals, so sick lizards cannot run a fever.B Invertebrates also have the ability to raise their temperature.C The internal temperatures of warm-blooded creatures are independent of the weather, so are the cold-blooded animals.D Sick lizards move into the sun to develop fever.

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考题单选题Scorpions injected with prostaglandins move to hot areas to ______.A engage in greater activityB seek out a more iron environmentC demonstrate that they are illD develop a fever and fight bacterial infections

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考题单选题A radio medical advice service（）ships of all nationalities and no charge is made for this service.A is available toB is available forC are available toD are available for

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考题单选题"Cast iron has poor corrosion resistance to sea water, especially in the presence of bronzes" Implies（）.A east iron is a cheap materialB cast iron can pollute sea waterC cast iron has mere corrosive than bronzes to sea waterD cast iron is more corrosive to sea water when it meets with bronzes

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考题单选题The food we eat seems to have profound effects on our health.Although science has made enormous steps in making food more fit to eat ,it has, at the same time,made many foods unfit to eat. Some research has shown that perhaps eighty percent of all human illnesses are related to diet and forty percent of cancer is related to the diet as well,especially cancer of the colon. Different cultures are more likely to cause certain different illnesses because of the food that is characteristic in these cultures. That food is related to illness is nto a new discovery. In 1945, about 35 years ago, government researchers realized that nitrates, commonly used to preserve color in meats,and other food additives,caused cancer. Yet, these carcinogenic additives remain in our food, and it becomes more difficult all the time to know which things on the packaging labels of processed food are helpful or harmful. The additives which we eat are not all so direct. Farmers often give penicillin to beef and living animals, and because of this ,penicillin has been found in the milk of treated cow. Sometimes similar drugs are given to animals not for medical purposes,but for financial reasons. The farmers are simply trying to fatten the animals in order to obtain a higher price on the market. Although the Food and Drug Administration(FDA) has tried repeatedly to control these procedures, the practices continue. What are nitrates used for?（）A They preserve flavor in packaged foods.B They preserve the color of meats.C They are the objects of research.D They cause the animals to become fatter.

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考题单选题Because most，if not all，of the evidence（）the carrier，the burden of proof soon shifts to the carrier，once the claimant has made initial proof of improper care.A are available forB is available toC are available toD is available for

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考题单选题The food we eat seems to have profound effects on our health.Although science has made enormous steps in making food more fit to eat ,it has, at the same time,made many foods unfit to eat. Some research has shown that perhaps eighty percent of all human illnesses are related to diet and forty percent of cancer is related to the diet as well,especially cancer of the colon. Different cultures are more likely to cause certain different illnesses because of the food that is characteristic in these cultures. That food is related to illness is nto a new discovery. In 1945, about 35 years ago, government researchers realized that nitrates, commonly used to preserve color in meats,and other food additives,caused cancer. Yet, these carcinogenic additives remain in our food, and it becomes more difficult all the time to know which things on the packaging labels of processed food are helpful or harmful. The additives which we eat are not all so direct. Farmers often give penicillin to beef and living animals, and because of this ,penicillin has been found in the milk of treated cow. Sometimes similar drugs are given to animals not for medical purposes,but for financial reasons. The farmers are simply trying to fatten the animals in order to obtain a higher price on the market. Although the Food and Drug Administration(FDA) has tried repeatedly to control these procedures, the practices continue. Which of the following statements is NOT ture?（）A Drugs are always given to animals for medical reasonsB Some of the additives in our food are added to the food itself and some are given to the living animalsC Researchers have known about the potential dangers of food additives for over thirty-five years.D Food may cause forty percent of cancer in world.

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考题单选题The food we eat seems to have profound effects on our health.Although science has made enormous steps in making food more fit to eat ,it has, at the same time,made many foods unfit to eat. Some research has shown that perhaps eighty percent of all human illnesses are related to diet and forty percent of cancer is related to the diet as well,especially cancer of the colon. Different cultures are more likely to cause certain different illnesses because of the food that is characteristic in these cultures. That food is related to illness is nto a new discovery. In 1945, about 35 years ago, government researchers realized that nitrates, commonly used to preserve color in meats,and other food additives,caused cancer. Yet, these carcinogenic additives remain in our food, and it becomes more difficult all the time to know which things on the packaging labels of processed food are helpful or harmful. The additives which we eat are not all so direct. Farmers often give penicillin to beef and living animals, and because of this ,penicillin has been found in the milk of treated cow. Sometimes similar drugs are given to animals not for medical purposes,but for financial reasons. The farmers are simply trying to fatten the animals in order to obtain a higher price on the market. Although the Food and Drug Administration(FDA) has tried repeatedly to control these procedures, the practices continue. What is the best possible title of the passage?（）A Drug and FoodB Cancer and HealthC Food and HealthD Health and Drug

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考题单选题It is implied in the passage that _____.A people should not take street level transportationB tiny iron particles will not cause health problemsC air pollution on an underground train is less poisonousD traveling on an underground train is better than taking the bus

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考题单选题Which of the following is not true of British iron and steel industry?（）A Britain.s steel industry is declining.B No more new discoveries of iron ore have been found in Britain.C Supplies of iron ore are now mostly foreign.D Compared with newer plants in the world,Britain.s steelworks are not efficient.

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