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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.
The best tide of the passage could be_________.
选项 A、Measuring Your Intelligence
B、Intelligence and Environment
C、The Case of Peter and Mark
D、How the Brain Influences Intelligence
答案B
解析 主旨大意题。本题问本文最佳标题可能是……。依据文章内容不难看出，第一段提出论点，第二段佐以实例加以论证，始终阐述一个观点：生长环境对智力的影响。据此选B应该不会错。其它选项均不能概括全文，自然就不能作为标题。问文章标题的题目与问文章中心思想的题目差别不大，只不过后者用词要求更为简洁干练罢了。
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