2. 职称英语
  3. Did Grandma seem forgetful at the holiday parties last month? It could be ti

Did Grandma seem forgetful at the holiday parties last month? It could be ti

游客2023-07-14  30
问题     Did Grandma seem forgetful at the holiday parties last month? It could be time to put her on a diet. Sharply【C1】______calories(卡路里)improves memory in older adults,according to a new study.
    Research on the benefits of an extremely low-calorie diet【C2】______back to the 1930s, when scientists found that rats lived【C3】______to twice as long when they ate less than control animals. And how about in human? To fill that【C4】______, scientist Agnes  and her colleagues at the University of Muenster【C5】______50 healthy elderly subjects. The【C6】______volunteer was 60 years old and overweight. The researchers【C7】______assigned the volunteers to one of three groups. Twenty people were instructed to reduce their daily calorie【C8】______by 30%, while still eating a【C9】______diet. Another 20 were told to keep their calorie intake the same but increase their【C10】______of unsaturated(不饱和的 )fatty acids. The【C11】______10 volunteers did not change their diets.
    After 3 months, all of the volunteers【C12】______a memory test in which they were shown 15 words and asked how many they could remember after 30 minutes.【C13】______average,those in the calorie-restriction group showed a 20%【C14】______over their baseline memory scores taken before they started their diets. Subjects in the other two groups showed【C15】______or no improvement. "Our study【C16】______provides some of the first【C17】______on the impact of calorie restriction on memory in the elderly, but this study has to be【C18】______up now," Floel noted. Her team plans to【C19】______larger studies to determine exactly【C20】______calorie restriction enhances memory. [br] 【C20】
选项 A、when
B、how
C、whether
D、what
答案 B
解析 考查语义逻辑。calories restriction enhances memory是已知的结果，故不用whether，而how表方式，符合句意。
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