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  3. There are two factors which determine an individual’s intelligence. The firs

There are two factors which determine an individual’s intelligence. The firs

游客2025-03-18  33
问题     There are two factors which determine an individual’s intelligence. The first is the sort of brain he is born【C1】______. Human brains differ considerably, some being more capable than others.【C2】______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【C3】______to the individual—the sort of environment in which he is reared. If an individual is handicapped【C4】______, it is likely that his brain will fail to develop and he will never attain the level of intelligence of which he is【C5】______.
    The importance of environment determining an individual’s intelligence can be【C6】______by the case history of the identical twins, Peter and John. When the twins were three months old, their parents died, and they were placed in【C7】______foster homes. Peter was reared by parents of low intelligence in an isolated community with poor educational【C8】______. John, however, was educated in the home of well-to-do parents who had been to college. This environmental【C9】______continued until the twins were in their late teens, when they were given tests to【C10】______their intelligence. John’s I. Q. was 125, twenty-five points higher than the average and fully forty points higher than his identical brother. [br] 【C9】
选项 A、exception
B、division
C、difference
D、alteration
答案 C
解析 从上文看，这对双胞胎兄弟生活在完全不同的家庭里，因此这里需填difference(区别，不同)，environmental difference指“环境方面的不同”。A项意为“例外”；B项意为“分开”；D项意为“更改，变动”，它强调动作本身，而本句指的是差异状态，因此，D不合适。
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