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

游客2023-09-13  25

问题     There are two factors which determine an individual’s intelligence. The
first is the sort of brain he is born in. Human brains differ considerably, some     【S1】______
being more capable than others. And no matter how good a brain he has to             【S2】______
begin with, an individual will have a low order of intelligence though he has        【S3】______
opportunities to learn. So the second factor is what happens to the individual--
the sort of environment in which he is brought about. If an individual is            【S4】______
handicapped (受阻碍) environmentally, it is likely that his brain will fail to
develop and he will ever attain the level of intelligence of which he is capable.    【S5】______
    The importance of environment on determining an individual’s intelligence        【S6】______
can be demonstrated by the case history of an identical twins, Peter and
Mark. When the twins were three months old, their parents died, and they were
placed in separate foster (寄养) homes. Peter was reared by parents of low
intelligence in an isolate community with poor educational opportunities.            【S7】______
Mark, moreover, was educated in the home of well-to-do parents who had               【S8】______
been to college. This environment difference continued until the twins were
by their late teens as young adults, when they were given tests to measure their     【S9】______
intelligence. Mark’s I.Q. was 125, 25 points high than the average, and fully        【S10】______
40 points higher than his identical brother. [br] 【S3】

选项

答案 though→unless

解析 语篇逻辑错误 上文是“一个人的智力会衰退”,下文是“有学习的机会”。当然不是通过学习而使智力衰退,而是除非学习,否则智力就会衰退。
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