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  3. The unhealthy ingredients and low nutrition content of the food can make you less active and lazy, new research shows. No surpri

The unhealthy ingredients and low nutrition content of the food can make you less active and lazy, new research shows. No surpri

admin2022-01-04  86
问题     The unhealthy ingredients and low nutrition content of the food can make you less active and lazy, new research shows. No surprises there.【C1】________, what is more shocking is that the energy-weakening effects of a junk food diet can persist,【C2】________after you switch to a healthy【C3】________.
    Two groups of female rats were fed different diets by researchers for a six-month period.  One group ate unprocessed foods such as corn and fish meal【C4】________the other ate a diet【C5】________to imitate junk food; high in sugar, and lower in【C6】________. While understandably the group eating the ’junk food’ diet gained more weight than the other, they also【C7】________from fatigue and became less active and less【C8】________—ie: lazier. In fact, those rats fed junk food took twice as many, and longer breaks during tasks than the rats eating a healthy diet, even tasks which【C9】________rewards.
    What is even more【C10】________is that switching these rats back onto a nutritious diet at the end of six months for nine days didn’t seem to reverse their weight gain or their ’learnt’ laziness. This could suggest that while an【C11】________case of bad food—say on holiday, will not have too much of a【C12】________effect if you generally eat a good diet and lead a healthy lifestyle. But those who eat a poor diet【C13】________the long term may actually become lazy and fatigued, as well as gaining weight and suffering the health consequences【C14】________being overweight.
    The research shows that switching【C15】________a healthy diet in the short term is unlikely to be【C16】________to reverse any of the side effects of a diet high in junk food. "Overweight people are often regarded as lazy and lacking【C17】________," says Blaisdell, a professor of psychology at UCLA "We【C18】________our results as suggesting that the idea commonly【C19】________in the media that people become fat because they are lazy is wrong. Our data suggest that diet-induced obesity is a cause,【C20】________an effect,, of laziness. Either the highly processed diet causes fatigue or the diet causes obesity, which causes fatigue."
【C16】
选项 A、sufficient
B、useful
C、competent
D、efficient
答案A
解析 本段开头提到研究中观察到那些吃了6个月的垃圾食品的小白鼠，切换回健康营养的饮食方式9天后，仍然不能扭转体重增加以及慵懒的状态。本句与上文语义呼应，阐述小白鼠实验中得出的结论：短期内不能逆转食用大量垃圾食品导致的副作用(reverse any of the side effects)，因为短期内给身体补充健康的食物是不够的，故选择A项sufficient“足够的”。B项useful表示“有用的”，短期内补充健康的食物还不能逆转食用大量垃圾食品导致的副作用，但不能说这样做没有用，而是要长期坚持下去。C项competent指“胜任，合格”，或受过专业技术等训练的能力。D项efficient表示“效率高的”，一般指人或机器有效地利用时间、精力并取得预期效果。
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