题目

任务型阅读 You probably already know that exercising is necessary to preserve muscle strength, keep your heart strong, and help you keep a healthy body weight.  "There's a lot of science behind this," says Dr. Scott McGinnis, an instructor at Harvard Medical School. Exercise improves your memory and thinking skills both directly and indirectly. It acts directly on the brain by encouraging the growth of new blood vessels (血管) in the brain.  Besides, many studies have suggested that the parts of the brain that control thinking and memory are larger in size in people who exercise than in people who don't. Exercise can also improve memory and thinking skills indirectly.  Problems in these areas frequently cause or contribute to memory loss and a lack of problem-solving skills. Is one exercise better than another in terms of brain health?  Almost all of the research so far has looked at walking. "But it's likely that another form of exercise that gets your heart pumping might produce similar benefits," explains Dr. McGinnis. A study found that Tai Chi(太极拳) showed the potential to help older adults in planning, working memory, attention and problem-solving. That may be because Tai Chi involves slow, focused movements and requires learning and memorizing new skills as well as movement patterns. Dr. McGinnis recommends establishing exercise as a habit. Several studies have shown that it takes about six months to start getting the benefits of exercise. A. We don't know the answer to this question. B. It makes you more resistant to some diseases. C. It even promotes the overall health of new brain cells. D. It improves people's sheep and reduces their stress and anxiety. E. Thus, he reminds you to be patient as you look for the first results F. But exercise can also help improve your memory and thinking skills. G. Start with a few minutes day and increase the amount until you reach your goal. 答案：【1】F【2】C【3】D【4】A【5】E

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