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According to the author，which of the following most interested the researchers?
A . The mice that started dieting in old age．
B . 27 of those 46 0ld genes that continued to behave like young genes．
C . Calorie restriction that works in people．
D . Dieting that makes sure a drug is effective．
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Marketers and business researchers should carefully study the customer wants and needs.
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Some researchers have promoted____ principles of designing lead-in.
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First published in 1927， the charts remain an ________ source for researchers.
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Researchers used three methods to get their data.
A．真
B．假
C．NOT GIVEN
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BELIE:
A．prevent
B．exhibit
C．regulate
D．aver
E．inflate
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Researchers all spoke favor of the DNA tests.
A．正确
B．错误
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Which of the following did the researchers find according to paragraph 4？
A．Moths could only pick out real flowers, not the artificial ones.
B．Moths picked out the correct flowers by their brightness.
C．Moths couldn't tell the difference between blue flowers and gray flowers.
D．Moths picked out the correct flowers by their color.
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What is NOT the attitude of researchers towards delay of marriage？
A．Delay of marriage is beneficial to males.
B．Delay of marriage will put women at a disadvantage.
C．It is reasonable for females to object to their boyfriends' dragging their feet on getting married.
D．Since women postpone their first marriage as late as 25, it is fair for men to delay marriage.
此题为多项选择题。
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To which of the following statements would the researchers most likely agree？
A．Results of the experiment played a vital role in the sin tax debate.
B．More subjects should be included in similar researches.
C．Though hypothetical, the research was still meaningful.
D．The real situation will provide better ways to tackle obesity.
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The underlined sentence in Paragraph 7 roughly means that the researchers believe that
A．mutated genes have a negative influence on Ashkenazim"s intelligence
B．mutated genes have played a role in Ashkenazim"s intelligence
C．the Ashkenazim"s high intelligence is caused by the mutated genes
D．the Ashkenazim"s illnesses have greatly handicapped their performance
此题为多项选择题。
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Researchers have discovered in their study that boys and girls may behave _____（）.
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Does the male speaker love the non-reader lifestyle. depicted by early researchers？
A．Yes, he loves it.
B．No, he thinks it is horrible.
C．He doesn't mention it.
D．He doesn't care about the lifestyle. problem.
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Researchers at Womens Hospital in Boston will______.
A．make a follow-up study of the same 37 subjects
B．spend more money making flavanol drinks
C．take more time to test Small"s results
D．do similar experiments on a larger scale
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Researchers think that it is______.
A．safe to eat fresh fish
B．dangerous to get close to the algae
C．safe to be near the algae
D．dangerous to expose the algae
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From what the two American researchers said we can conclude that____.
A．the American experts working in the refrigerator project are disappointed with China's refrigerator production
B．the American researchers are particularly worried about China's over-emission of CFC into the air
C．the American researchers in refrigerator technology enjoy their opportunity to work in China
D．the American experts sees China as the best place to increase their export of refrigerator technology
此题为多项选择题。
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听力原文：According to the researchers, what measures can be taken to help with sleep problems？
(32)
A．Increasing visits to doctors.
B．More training among health care workers.
C．Having better diets and exercise.
D．Producing less at work.
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Researchers previously concluded that lack of sleep led teenagers to
A．stay away from drugs.
B．increase drug use.
C．reduce drug use.
D．imitate their friends.
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In the opening paragraph, Spanish researchers suggest that
A．the weather system of Europe follows a strict weekly cycle.
B．there is a great possibility of rain in Spain on weekends.
C．rain cycles have resulted from the excessive human activities.
D．weather interacts with human activities in a straightforward way.
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Researchers were surprised by the answer that the volunteers gave in the first test. 查看材料
A.Right
B.Wrong
C.Not mentioned
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Why are researchers seriously coneel33ed with the phenomenon of colony—collapse disorder？
A．Because honeybees produce one—third 0f the foods we eat
B．Because honeybees feed on flowers．
C．Because honeybees eat seeds of flowers．
D．Both B and C．
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The researchers are concerned about increasing（)of the illness in the village.
A．A.rate
B．B.speed
C．C.frequency
D．D.happening
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Many researchers believe that the presence of RNA ...
Many researchers believe that the presence of RNA in brain cells is the biochemical basis of memory; that is, the presence of RNA enables us to remember. Because certain chemicals are known to inhibit the synthesis of RNA in the body, we can test this hypothesis. Animals that have learned particular responses can be injected with an RNA inhibitor and then tested for memory of the learned responses. Which of the following test results would most seriously weaken the case for RNA as the basis of memory？
A．After an injection of RNA inhibitor, a wide range of behaviors in addition to the learned responses were affected.
B．After an injection of RNA inhibitor, animals that had not consistently been giving the learned responses were able to give them consistently.
C．After injections of RNA inhibitor, some animals lost memory of the learned responses totally but others lost it only partially.
D．After a small injection of RNA inhibitor, animals responded well, but as the size of the injection increased, they gave fewer of the learned responses.
E．After an injection of RNA inhibitor, animals could not learn a new response.
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However, the researchers identified sixty－one genes that speed up or（)with age.
A.set in
B.chase after
C.slow down
D.hold up
