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题型:阅读理解-阅读单选 难度:0.4 引用次数:89 题号:7469797

With more and more people having a longer life in the world, people are eager to know what to do and what not to do.

It is well know that women live longer on average than men — and some researchers claim this is because they are better at visiting their doctor and voicing any concerns about their health, rather than sticking their heads in the sand.

Not smoking, not being overweight and taking sufficient exercise keep your heart and blood vessels healthy for longer — and all that is good for your brain, too.

One popular theory about aging concerns the damage caused to the tissues in our bodies by “free radicals (自由基)”. Our immune system makes these free radicals ineffective using antioxidant (抗氧化剂) nutrients such as vitamins A and C, and the theory is that a diet high in such “antioxidants” will help you hold back the the years. In fact, though there is no doubt among scientists that free radicals harm the body, there is no hard proof that aging is caused simply by a lack of sufficient antioxidants in our bodies or our food.

Another theory growing in popularity holds that we can stay alive longer by eating less, for an experiment concluded mice live longer when fed 30 percent fewer calories. Though the beneficial effect has since been found in other species, including fruit flies, what we really want to know is how this applies to humans. The answer may be found in long-term experiments in the U.S. using rhesus monkeys, which are closely related to us in evolutionary terms. However, though the aging process is slower in those animals, monkeys on the calorie restriction group do not appear to live longer.

1. Which of the following would the author agree with?
A.Go on a diet.
B.Say your worries aloud if you have any.
C.Take in sufficient antioxidants.
D.The more physical exercise, the better.
2. What do we know about free radicals?
A.They have a negative effect on humans.
B.They can produce vitamins A and
C.They account for a lack of antioxidants.
D.They help humans hold back the years.
3. It can be conclude from the last paragraph that ______.
A.fruit flies are closest to humans in genes
B.the author is not a little in favor of eating less
C.calorie restriction doesn’t necessarily work out well
D.the less a rhesus monkey eats, the longer it will live
4. What does this passage mainly talk about?
A.Facts about losing weight.
B.Way to keep healthy.
C.How to have a longer life.
D.How to live happily.
【知识点】 方法/策略 健康饮食

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【推荐1】“A lie can travel halfway around the world before the truth can get its boots (靴子) on.” said Mark Twain. In today’s Internet world of “fake (假的) news,” lies spread even faster and the truth is having trouble finding its boots.

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