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  3. If you do not use your arms or legs for some time, they become weak; when you start using them again, they slowly become strong

If you do not use your arms or legs for some time, they become weak; when you start using them again, they slowly become strong

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问题     If you do not use your arms or legs for some time, they become weak; when you start using them again, they slowly become strong again. Everybody knows this, and nobody would think of questioning this fact. Yet many people do not seem to know that memory works in the same way. When some one says that he has a good memory, he really means that he keeps his memory in practice by exercising it regularly, either consciously or unconsciously. When someone else says that his memory is poor, he really means that he does not give it enough practice. The position is exactly the same as that of two people, one of whom exercises his arms and legs by playing tennis, while the other sits in a chair or a car all day.
    If a friend complains that his arms are weak, we know that it is his own fault. But if he tells us that he has a poor memory, many of us think that his parents are to blame, or that he is just unlucky, and few of us realize that it is just as much his own fault as it was his arms or legs that were weak. Not all of us can become extremely strong or extremely clever; but all of us can, if we have ordinary bodies and brains, improve our strength and our memory by the same means — practice.
    Have you ever noticed that people who cannot read or write usually have better memories than those who can? Why is this? Of course, because those who cannot read or write have to remember things: they cannot write them down in a notebook. They have to remember dates, times, prices, names, songs and stories, so their memory is always being exercised.
    So if you want a good memory, learn from the poor and humble: practise remembering.
The first paragraph is intended to tell us that______.
选项 A、everybody knows that memory works in the same way as arms or legs
B、it is a fact that some people do not use their arms or legs
C、to have a good memory, one has to exercise it regularly
D、to keep fit, one should not sit in a chair or a car all day
答案C
解析 本题为段落主旨题。文章第一段从身体四肢需要经常锻炼才能强健的事实引入话题，说明人的记忆力也要不断地锻炼才能强化的道理。文章明确说“Yet many people do not seem to know that memory works in the same way．”从这个句子可以得知选项A．everybody knows that memory，works in the same way as arms or leg所表达的意思与这个结论正好相反，故不正确。选项B的内容在文中并没有提及，且明显有悖常识，故不正确。选项C．to have a good memory, one has to exercise it regularly与第一段中表达的意思完全一致，因此选项C为正确答案。选项D．to keep fit，one should not sit in a chair or a car all day并没有说明需要锻炼，与文章第一段表达的内容符合度不够。
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