单项选择题

According to the passage, the researchers are interested in ______.

A．the mice that started dieting in old age
B．27 of those 46 old genes that continued to behave like young genes
C．calorie restriction that works in people
D．dieting that makes sure a drug is effective

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热门试题

单项选择题

It can be inferred from the passage that completely normally fed mice ______.

A．will not experience free radical production
B．will experience more genetic rejuvenation in their lifetime
C．have more old liver genes to behave like young genes
D．are more likely to suffer from inflammation

单项选择题

It is implied in the first paragraph that ______.

A．eating more than usual might make us live longer
B．if we go on a diet when old, we may keep healthy
C．dieting might be needed
D．we have to diet in the early childhood if we want to live longer