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  3. Are some people born clever, and others born stupid? Or is intelligence(智力)developed by our environment and our experience? Stra

Are some people born clever, and others born stupid? Or is intelligence(智力)developed by our environment and our experience? Stra

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问题     Are some people born clever, and others born stupid? Or is intelligence(智力)developed by our environment and our experience? Strangely enough, the answer to both these questions is yes. To some extent our intelligence is given us at birth, and no amount of special education can make a genius(天才)out of a child born with low intelligence. On the other hand, a child who lives in a boring environment will develop his intelligence less than one who lives in rich and varied surroundings. Thus the limits of a persons intelligence are fixed at birth, but whether or not he reaches those limits will depend on his environment. This view, now held by most experts, can be supported in a number of ways.
    It is easy to show that intelligence is to some extent something we are born with. The closer the blood relationship between two people, the closer they are likely to be in intelligence. Thus, if we take two unrelated people at random(随意)from the population. it is likely that their degrees of intelligence will be completely different. If on the other hand we take identical twins, they will very likely be as intelligent as each other. Relations like brothers and sisters, parents and children, usually have similar intelligence, and this clearly suggests that intelligence depends on birth.
    Imagine now that we take two identical(同一的)twins and put them in different environments. We might send one, for example, to a university and the other to a factory where the work is boring. We would soon find differences in intelligence developing, and this indicates that environment as well as birth plays a part. This conclusion us also supported by the fact that people who live in close contact with(与……相接触)each other, but who are not related at all, are likely to have similar degress of intelligence.
To show that intellingence depends on birth, we may______.
选项 A、have two identical twins’ blood tested, and then compare the results
B、have two unrelated people’s blood tested, and then compare the results
C、respectively examine the intelligence of brothers and sisters as well as that of parents and children, and then compare the results
D、respectively examine the intelligence of two identical twins as well as that of two unrelated people taken at random, and then compare the results
答案D
解析 文章第二段讲到如果在人群中随意找来毫无血缘关系的两个人，或找来血缘相同的一对双胞胎进行研究，结果可能是：前者的智力完全不同，后者的智力非常相似，D项符合这一意思。
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