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A. severe B. generally C. treatment D. mistaken E. challenges F. disapprove G. matter H. rigorous I. magic J. suspected K. pub
A. severe B. generally C. treatment D. mistaken E. challenges F. disapprove G. matter H. rigorous I. magic J. suspected K. pub
admin
2019-11-28
64
问题
A. severe B. generally C. treatment D. mistaken E. challenges
F. disapprove G. matter H. rigorous I. magic J. suspected
K. publically L. factors M. faulty N. based O. questioned
Scientists have finally figured out how the key gene tied to obesity makes people fat, a major discovery that could open the door to an entirely new approach to the problem beyond diet and exercise.
Since 2007, researchers have known that a gene called FTO was related to obesity, but they didn’t know how, and could not tie it to appetite or other known【C1】______.
Now experiments reveal that a【C2】______ version of the gene causes energy from food to be stored as fat. Genetic tinkering in mice and on human cells in the lab suggests this can be reversed, giving hope that a drug or other【C3】______ might be developed to do the same in people.
The discovery【C4】______ the notion that "when people get obese it was basically their own choice because they choose to eat too much or not exercise," said study leader Melina Claussnitzer, a genetics specialist. For the first time, genetics has revealed a mechanism in obesity that was not really【C5】______ before and gives a third explanation or factor that’s involved.
Several obesity drugs are already on the market, but they are【C6】______ used for short-term weight loss and are aimed at the brain and appetite: they don’t directly target metabolism. Researchers can’t guess how long it might take before a drug【C7】______ on the new findings becomes available. But it’s unlikely it would be a【C8】______ pill that would enable people to eat anything they want without packing on the pounds. And targeting this fat pathway could affect other things, so a treatment would need【C9】______ testing to prove safe and effective.
The gene glitch doesn’t explain all obesity. It was found in 44 percent of Europeans but only 5 percent of blacks, so other genes clearly are at work, and food and exercise still【C10】______.
【C5】
选项
答案
J
解析
(suspected)从词性判断,该空格需要填入动词ed形式。选择suspected有两个依据:1.下文提及的“gives a third explanation or factor that’s involved”表示这个对肥胖症的解释是以前未曾想到的。2.与questioned用法的辨析。suspect表示“认为可能(think that something is probably true,especially something bad)”,如:I suspected that there was something wrong with the engine.而question则表示“认为不可能(have or express doubts about whether something is true,good,necessary,etc.)”,例如:Are you questioning what I’m saying?
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专业英语四级
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