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A. severe B. generally C. treatment D. mistaken E. challenges F. disapprove G.
A. severe B. generally C. treatment D. mistaken E. challenges F. disapprove G.
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2024-09-07
11
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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】______. [br] 【C9】
选项
答案
H
解析
(rigorous)从词性判断,该空格需要填入形容词。选择rigorous首先依据下文to prove safe and effective,即“证明安全性和有效性”的测试,还基于与severe用法的辨析:rigorous表示要求或过程“careful,thorough,and exact(严格的、严谨的)”,例如:The car is put through rigorous road performance tests.而severe则表示危机或破坏等“严重的(very bad or very serious)”,例如:The US faces severe economic problems.
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