[简答题]Previous studies have shown the longer the mom breastfeeds, the more benefit for her body.

[简答题]Previous studies have shown the longer the mom breastfeeds, the more benefit for her body.

[单项选择]Previous studies have indicated that eating chocolate increases the likelihood of getting heart disease. However, a new, more reliable study has indicated that eating chocolate does not increase the likelihood of getting heart disease. When the results of the new study become known, consumption of chocolate will undoubtedly increase.
Which of the following is an assumption on which the conclusion above is based
A. Most people who eat a great deal of chocolate will not get heart disease.
B. Although they believe that eating chocolate increases the likelihood of getting heart disease, some people still eat as much chocolate as they want.
C. People who have heard that eating chocolate increases the likelihood of getting heart disease do not believe it.
D. There are people who currently eat as much chocolate as they want because they have not heard that eating chocolate increases the likelihood of getting heart disease.
E. (E) There are people who currently limit their consumption of chocolate only because they believe that eating chocolate increases the likelihood of getting heart disease.

[单项选择]—How many cakes can I have, Mom
—None, dear. They （　） for your father.
A. prepare
B. prepared
C. have prepared
D. were prepared

[填空题]Contaminated toothbrushes have been already shown to transmit viruses and bacteria.

[单项选择]Police statistics have shown that automobile antitheft devices reduce the risk of car theft, but a statistical study of automobile theft by the automobile insurance industry claims that cars equipped with antitheft devices are, paradoxically, more likely to be stolen than cars that are not so equipped:
Which one of the following, if true, does the most to resolve the apparent paradox ？（）
A. Owners of stolen cars almost invariably report the theft immediately to the police but tend to delay notifying their insurance company, in the hope that the vehicle will be recovered.
B. Most cars that are stolen are not equipped with antitheft devices, and most cars that are equipped with antitheft devices are not stolen.
C. The most common automobile antitheft devices are audible alarms, which typically produce ten false alarms for every actual attempted theft.
D. Automobile owners who have particularly theft-prone cars and live in areas of greatest incidence of car theft are those who are most likely to have antitheft devices installed.
E. Most automobile thefts are the work of professional thieves against whose efforts antitheft devices offer scant protection.

[简答题]Both research and practical experience have shown that a （）(均衡的饮食对健康是必不可少的).

[填空题]Studies have shown that students who take several tests learn more than _________________________________(看完资料只参加一次测试的学生).

[简答题]Experiments have shown that colors, partly because of their physiological associations, also have a direct psychological effect.

[填空题]Some of these studies have shown that although some people have trouble to fall asleep, others have an equally difficult time waking up.

• A. have shown
• B. to fall asleep
• C. equally
• D. waking up

[简答题]Other tests have shown that laughter appears to be able to re- duce the effect of pain on the body.

[单项选择]Studies have shown that people who rarely take antibiotics, which are antibacterial drugs, have stronger immune systems than do people who take antibiotics frequently. Yet there is no evidence that taking antibiotics weakens the immune system.
Which of the following, if true, best reconciles the apparent discrepancy in the information above ？（）
A. People who have strong immune systems seldom get the kinds of infections for which people normally take antibiotics.
B. People who have strong immune systems are seldom aware that their immune systems are unusually strong.
C. People who have weak immune systems have great difficulty recovering from bacterial infections if they do not take antibiotics.
D. Some people take antibiotics even though the antibiotics cause a variety of side effects.
E. Some people take antibiotics frequently because their doctors prescribe antibiotics for viral infections as well as for bacterial infections.

[单项选择]Which of the following have studies shown has the greatest impact on the return of a portfolio（　）
A. Security selection.
B. Target asset allocation.
C. Market timing.

[填空题] Now that I am no longer young, I have friends whose mothers have passed away. I have heard these sons and daughters say they never fully appreciated their mothers 【B1】 it was too late to tell them. I am blessed with the dear mother who is still alive. I 【B2】 her more each day. My mother does not change, but I 【B3】. As I grow older and wiser, I realize 【B4】 an extraordinary person she is. How 【B5】 that I am unable to speak these words in her 【B6】, but they flow easily from my pen. How does a daughter begin to thank her mother for life itself For the love, patience and just 【B7】 hard work that go into 【B8】 a child For running after a toddler, for understanding a 【B9】 teenager, for tolerating a college student who knows 【B10】 For waiting for the day when a daughter 【B11】 how wise her mother really is How does a 【B12】 woman thank a mother for 【B13】 to be a mother For being ready 【B14】 advice (when asked) or remaining 【B15】 when it is most appreciated For not saying, "I
A. A．told
B．shouted
C．uttered
D．muttered