Researchers at Womens Hospital in Boston will______.

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．

A．真 B．假 C．NOT GIVEN

A．正确 B．错误

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.

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。

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.

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。

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.

A．Y B．N C．NG

A．the change of women"s life style. in the history B．women"s struggle for independence in the history C．female celebrities"contributions to the world D．the private stories and legacies of female celebrities

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

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。

A．stay away from drugs. B．increase drug use. C．reduce drug use. D．imitate their friends.

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.

The 【32】______ depends on everything from what you hope to 【33】______ to how your life is 【34】______ If you are in a big hurry to drop pounds 【35】______ , dieting is the way to go. Decades of 【36】______ have shown it's the surest and quickest method. If you are more 【37】______ with how you look than with numbers on the scale, though, 【38】______ may be the way to go. By increasing physical activity, you'll 【39】______ fat and build muscle tissue. 【40】______ often end up losing both fat and muscle tissue. Your 【41】______ approach is one that suits your lifestyle. If you've tried and 【42】______ at one approach, consider the other. "A lot of people have become so disappointed that they begin to think they'll 【43】______ be able to lose weight," says Marcus. "That's when it's time to try something new. 【44】______ a small step forward can help people 【45】______ confidence and convince themselves they can make even bigger changes." 【26】 A．active B．productive C．comprehensive D．effective

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．

A．A.rate B．B.speed C．C.frequency D．D.happening

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.

The audience watching the films was asked to rate the executive and the visitor in terms of status.A certain set of rules about status began to emerge from the ratings.The visitor showed the least amount of status when he stopped just inside the door to talk across the room to the seated man.He was considered to have more status when he walked halfway up to the desk，and he had the most status when he walked directly up to the desk and stood right in front Of the seated executive. Another thing that affected the status of the visitor in the eyes of the observers was the time between knocking and entering.For the seated executive，his status was also affected by the time between hearing the knock and answering.The quicker the visitor entered the room，the more status he had.The longer the executive took to answer，the more status he had. 11.The experiment designed by the two researchers aimed at finding out(). A、how business is conducted by an executive and a visitor B、how to tell the differences between an executive and a visitor C、how to tell businessmen at a glance D、how businessmen indicate status 12.Which ofthe statements can best sum up the passage(). A、The executive has a higher status than the visitor. B、Mitary people wear uniforms but the businessmen do not C、Astudy revealing a set of rules about the stalus of businessmen. D、tisa good melthod to use a series of silent fim in research 13.Having entered the room, the closer the visitor approaches the executive,(). A、the less it affected his status B、the lower his status C、the more it affected his status D、the higher his status 14.The longer the seated man was in answering the knock,(). A、the higher his status B、the less it affected his status C、the lower his status D、the more it affected his status 15.Which statementis NOT true(). A、Soldiers wear uniforms with various symbols so that one can tell their status ata glance. B、In the experiment, one actor played the executive while the other played the seated man C、Business people wear similar suits. D、The audience watching the flim rated the executve and the vsitor in tems of status

A.set in B.chase after C.slow down D.hold up