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  3. There are two factors which determine an individual’s intelligence. The first is the sort of brain he is born with. Human brains

There are two factors which determine an individual’s intelligence. The first is the sort of brain he is born with. Human brains

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问题     There are two factors which determine an individual’s intelligence. The first is the sort of brain he is born with. Human brains differ considerably, some being more capable than others. But no matter how good a brain he has to begin with, an individual will have a low order of intelligence unless he has opportunities to learn. So the second factor is what happens to the individual in the sort of environment in which he is reared (养育). If an individual is handicapped (残疾的) environmentally, it is likely that his brain will fail to develop and he will never attain the level of intelligence of which he is capable.
    The importance of environment in determining an individual’s intelligence can be demonstrated by the case in history of the identical twins, Peter and Mark. Being identical, the twins had identical brains at birth, and their growth processes were the same. When the twins were three months old, their parents died, and they were placed in separate foster (收养的) homes. Peter was reared by parents of low intelligence in an isolated community with poor educational opportunities. Mark was reared in the home of well - to - do parents who had been to college. He was reared as a child, sent to good schools, and given every opportunity to be stimulated intelligently. This environmental difference continued until the twins were in their late teens, when they were given tests to measure their intelligence. Mark’s IQ was 125, twenty - five points higher than the average and fully forty points higher than his identical brother; Given equal opportunities, the twins, having identical brains, would have tested roughly the same level.
This passage suggests that an individual’s I. Q._________.
选项 A、can be increased by education
B、stays the same throughout his life
C、can be predicted at birth
D、is determined by his childhood
答案A
解析 推论题。本题问本文暗示了_个人的智力商数……。依据文中麦克的成长经历与他的智力检测结果，不难推理出人的智力商数通过教育是可以提高的这一结论，故选A。其它选项皆与事实不符。选项B．“终身不变”。选项C．“出生时即可预测出来”。选项D．“是由其童年决定的"。
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