2. 外语
  3. There are two factors which determine an individual’s intelligence. The first is the【B1】______of brain he is born with. Human br

There are two factors which determine an individual’s intelligence. The first is the【B1】______of brain he is born with. Human br

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问题     There are two factors which determine an individual’s intelligence. The first is the【B1】______of brain he is born with. Human brains differ【B2】______, some being more capable than others. But no matter how good a brain he has to begin with, an【B3】______will have a low order of intelligence unless he has【B4】______to learn. So the second factor is the sort of environment in which he is【B5】______. If an individual is handicapped environmentally, it is likely that his brain will【B6】______to develop and he will never attain the level of intelligence of which he is【B7】______.
    The importance of environment in determining an individual’s intelligence can be demonstrated by the case history of the【B8】______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 homes.【B9】______Mark was reared in the home of well-to-do parents who had been to college. He was read to as a child, sent to good schools, and given every opportunity to be stimulated intellectually.【B10】______. Mark’s I. Q was 125, twenty-five points higher than the average and fully forty points higher than his identical brother.【B11】______.
【B8】
选项
答案identical
解析 identical意为“相同的”。从后面twins可推知空格处填一形容词修饰twins。形容双胞胎，通常用形容词 identical，并且下一句中identical是本空所填词的原词复现。
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