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单选题
Animals, which are nevertheless displaying some extremely different physiological and behavioral traits, are genetically similar.
A
Animals, which are nevertheless displaying some extremely different physiological and behavioral traits, are genetically similar.
B
Though genetically similar, animals, nevertheless, display some extremely different physiological and behavioral traits.
C
Some animals that are genetically similar nevertheless display extremely different physiological and behavioral traits.
D
Some animals display extremely different physiological and behavioral traits, they are genetically similar, nevertheless.
E
Some animals display extremely different physiological and behavioral traits and are genetically similar.
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参考解析
解析：
A项改变了句子原来的意思且讲不通。B项也是同样的错误。B项累赘。D项不符合逻辑。E项错用“and”连接句子前后形成对比的分句，只有C项正确。
A项改变了句子原来的意思且讲不通。B项也是同样的错误。B项累赘。D项不符合逻辑。E项错用“and”连接句子前后形成对比的分句，只有C项正确。
更多 “单选题Animals, which are nevertheless displaying some extremely different physiological and behavioral traits, are genetically similar.A Animals, which are nevertheless displaying some extremely different physiological and behavioral traits, are genetically similar.B Though genetically similar, animals, nevertheless, display some extremely different physiological and behavioral traits.C Some animals that are genetically similar nevertheless display extremely different physiological and behavioral traits.D Some animals display extremely different physiological and behavioral traits, they are genetically similar, nevertheless.E Some animals display extremely different physiological and behavioral traits and are genetically similar.” 相关考题
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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
Can animals be made to work for us?Some scientists think that one day animals may be trained to do a number of simple jobs that are now done by human beings.
They point out that at a circus,for example,we may see elephants,monkeys,dogs and other animals doing quite skillful things．Perhaps you have seen them on the television or in a film．If you watch closely,you may notice that the trainer always gives the animal a piece of candy or a piece of fruit as a reward．The scientists say that many different animals may be trained to do a number of simple jobs if they know they will get a reward for doing them.
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Apes have been used in America in helping to make cars,and scientists believe that these large monkeys may be one day gather crops and even drive trains.
What made scientists think animal can be made to work for us one day?A.Animals are very skillful at a circu
B.They are big and stron
C.Some animals are as clever as human being
D.Animals can be trained because they like to get something as a rewar
考题
Can animals be made to work for us?Some scientists think that one day animals may be trained to do a number of simple jobs that are now done by human beings.
They point out that at a circus,for example,we may see elephants,monkeys,dogs and other animals doing quite skillful things．Perhaps you have seen them on the television or in a film．If you watch closely,you may notice that the trainer always gives the animal a piece of candy or a piece of fruit as a reward．The scientists say that many different animals may be trained to do a number of simple jobs if they know they will get a reward for doing them.
Of course,as we know,dogs can be used to guard a house,and soldiers in both old and modem times have used geese to give warning by making a lot of noise when a stranger or an enemy comes near．But it may be possible to train animals to work in factories．In Russia,for example,pigeons which are birds with good eyesight,are being used to watch out for faults in small steel balls that are being made in one factory．When the pigeon sees a ball which looks different from others,it touches a steel plate with its beak．This turns on a light to warn people in the factory．At the same time a few seeds are given as a reward．It takes three to five weeks to train a pigeon to do this and one pigeon can inspect 3 000 to 4 000 balls an hour.
Apes have been used in America in helping to make cars,and scientists believe that these large monkeys may be one day gather crops and even drive trains.
Which of the following is not true?A.Scientists consider apes may drive trains some da
B.Apes have worked in some factorie
C.Apes may one day be used to gather crop
D.An ape is not a large monke
考题
Can animals be made to work for us?Some scientists think that one day animals may be trained?to do a number of simple jobs that are now done by human beings.
They point out that at a circus,for example,we may see elephants,monkeys,dogs and other ani-mals doing quite skillful things.Perhaps you have seen them on the television or in a film.If you?watch closely,you may notice that the trainer always gives the animal a piece of candy or a piece of?fruit as a reward.The scientists say that many different animals may be trained to do a number of?simple jobs if they know they will get a reward for doing them.
Of course,as we know,dogs can be used to guard a house,and soldiers in both old and modern?times have used geese to give warning by making a lot of noise when a stranger or an enemy comes?near.But it may be possible to train animals to work in factories.In Russia,for example,pigeons?which are birds with good eyesight,are being nsed to watch out for faults in small steel balls that are?being made in one factory.When the pigeon sees a ball which looks different from others,it touches a?steel plate with its beak.This turns on a light to warn people in the factory.At the same time a few?seeds are given as a reward.It takes three to five weeks to train a pigeon to do this and one pigeon?can inspect 3,000 to 4,000 balls an hour.
Apes have been used in America in helping to make cars,and scientists believe that these large?monkeys may be one day gather crops and even drive trains.
Which of the following is NOT true?A.Scientists consider apes may drive trains some day.
B.Apes have worked in some factories.
C.Apes may one day be used to gather crops.
D.An ape is not a large monkey.
考题
Can animals be made to work for us?Some scientists think that one day animals may be trained?to do a number of simple jobs that are now done by human beings.
They point out that at a circus,for example,we may see elephants,monkeys,dogs and other ani-mals doing quite skillful things.Perhaps you have seen them on the television or in a film.If you?watch closely,you may notice that the trainer always gives the animal a piece of candy or a piece of?fruit as a reward.The scientists say that many different animals may be trained to do a number of?simple jobs if they know they will get a reward for doing them.
Of course,as we know,dogs can be used to guard a house,and soldiers in both old and modern?times have used geese to give warning by making a lot of noise when a stranger or an enemy comes?near.But it may be possible to train animals to work in factories.In Russia,for example,pigeons?which are birds with good eyesight,are being nsed to watch out for faults in small steel balls that are?being made in one factory.When the pigeon sees a ball which looks different from others,it touches a?steel plate with its beak.This turns on a light to warn people in the factory.At the same time a few?seeds are given as a reward.It takes three to five weeks to train a pigeon to do this and one pigeon?can inspect 3,000 to 4,000 balls an hour.
Apes have been used in America in helping to make cars,and scientists believe that these large?monkeys may be one day gather crops and even drive trains.
What made scientists think animal can be made to work for us one day?A.Animals are very skillful at a circus.
B.They are big and strong.
C.Some animals are as clever as human beings.
D.Animals carl be trained because they like to get something as a reward.
考题
A new computer is displaying the wrong amount of memory. Which of the following may be the cause？（）A、The module is installed backwards.B、A USB device is using some memory.C、An onboard video card is using some memory.D、The CPU is using some memory.
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.
考题
Bridges and switches are Layer 2 devices that provide the same basic functionality but that also have some differences. Which two traits apply to switches only？（）A、 supports Layer 2 VLANsB、 segment LANsC、 are faster because forwarding decisions are made on hardwareD、 typically have fewer ports because forwarding decisions are made in softwareE、 flood frames out all ports
考题
单选题Some animals can _____ in the desert on very little water.A
surviveB
starveC
relieveD
routine
考题
单选题In the last part of the passage, the sentence “Food for animals is often seasonal, always expensive” means food for animals if often ______.A
different and expensive in different seasonsB
similar and expensive in different seasonC
seasoned and expensiveD
eaten with spices and thus expensive
考题
单选题Animals, which are nevertheless displaying some extremely different physiological and behavioral traits, are genetically similar.A
Animals, which are nevertheless displaying some extremely different physiological and behavioral traits, are genetically similar.B
Though genetically similar, animals, nevertheless, display some extremely different physiological and behavioral traits.C
Some animals that are genetically similar nevertheless display extremely different physiological and behavioral traits.D
Some animals display extremely different physiological and behavioral traits, they are genetically similar, nevertheless.E
Some animals display extremely different physiological and behavioral traits and are genetically similar.
考题
单选题Some children want to challenge themselves by learning a language different from which their parents speak at home.A
want toB
themselvesC
whichD
at home
考题
单选题Some people argue that it would do more harm than good for plants and animals to develop through artificial selection. Which statement best supports this argument?A
Roses no longer smell like roses.B
Purebred dogs are disappearing.C
Humans are harmful agents of plant and animal evolution.D
Many domesticated plants and animals can no longer survive in the wild.
考题
单选题Which of the following statements is closest in meaning to that expressed in the passage?A
There are very few technologies that are currently held as controversial.B
Critics object to genetically modified (GM) crops grown in many different countries in Europe.C
A main objection against GM food is that it is not naturally produced.D
The transportation of such crops across the Spanish borders is difficult.
考题
单选题Most animals have little connection with _____ animals of _____ different kind unless they kill them for food.A
the: /B
/; aC
the; theD
/; /
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.
考题
问答题Practice 2 Transgenic plants and animals result from genetic engineering experiments in which genetic material is moved from one organism to another, so that the latter will exhibit a characteristic. Business corporations, scientists, and farmers hope that transgenic techniques will allow more cost-effective and precise plants and animals with desirable characteristics that are not available using up to date breeding technology. Transgenic techniques allow genetic material to be transferred between completely unrelated organisms. In order for a transgenic technique to work, the genetic engineer must first construct a transgene, which is the gene to be introduced plus a control sequence. When making a transgene, scientists usually substitute the original promoter sequence with one that will be active in the correct tissues of the recipient plant or animal. The creation of transgenic animals is one of the most dramatic advances derived from recombinant DNA technology. A transgenic animal results from insertion of a foreign gene into an embryo. The foreign gene becomes a permanent part of the host animals’ genetic material. As the embryo develops, the foreign gene may be present in many cells of the body, including the germ cells of the testis or the ovary. If the transgenic animal is fertile, the inserted foreign gene (transgene) will be inherited by future progeny. Thus, a transgenic animal, once created, can persist into future generations. Transgenic animals are different from animals in which foreign cells or foreign organs have been engrafted. The progeny of engrafted animals do not inherit the experimental change. The progeny of transgenic animals do. The techniques for creating a transgenic animal include the following: 1) picking a foreign gene, 2) placing the foreign gene in a suitable form called a “construct” which guides the insertion of the foreign gene into the animal genome and encourages its expression, and 3) injecting the construct into a single fertilized egg or at the very early embryo stage of the host animal. Much genetic engineering goes into the choice of a foreign gene and building a construct. The construct must have promoters to turn on foreign gene expression at its new site within the host animal genome. By choosing a particular promoter and splicing it in front of the foreign gene, we can encourage expression of our transgene within a specific tissue. One of the most important applications of transgenic animals is the development of new animal models of human disease. Transgenic animals can serve as models for many malignant tumors. Mice have been the most frequent hosts for transgenic modification, other domestic animals have also been used. One idea has been to create transgenic cows which secrete important pharmaceutical substances in their milk. Other attempts are being made to express human interferon in the milk of sheep. A transgenic crop plant contains a gene or genes which have been artificially inserted instead of the plant acquiring them through pollination. The inserted gene sequence (known as the transgene) may come from another unrelated plant, or from a completely different species: transgenic BT corn, for example, which produces its own insecticide, containing a gene from a bacterium. Plants containing transgenes are often called genetically modified or GM crops although in reality all crops have been genetically modified from their original wild state by domestication, selection and controlled breeding over long periods of time.
考题
单选题A new computer is displaying the wrong amount of memory. Which of the following may be the cause？（）A
The module is installed backwards.B
A USB device is using some memory.C
An onboard video card is using some memory.D
The CPU is using some memory.
考题
单选题Some of these shoals have been disproved and are not charted. Nevertheless mariners should （）with particular caution in this area.A
goB
proceedC
moveD
remove
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