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According to the passage, the average I. Q. is [br] [originaltext] There are
According to the passage, the average I. Q. is [br] [originaltext] There are
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2024-09-28
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问题
According to the passage, the average I. Q. is [br]
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—the sort of environment in which he is reared. The importance of environment in determining an individual’s intelligence can be demonstrated by the case history of the identical twins, Peter and Mark X. Being identical, the twins had identical brains at birth, and their growth processes were the same. When the twins were three months old, they were placed in separate foster homes. Peter was roared by parents of low intelligence in an isolated community with poor educational opportunities. Mark was roared 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. This environmental difference continued until the twins were in their late teens, when they were brought together to measure their intelligence. Mark’s I. Q. 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 at roughly the same level.
选项
A、human brains differ considerably.
B、the brain a person is born with is important in determining his intelligence.
C、environment is crucial in determining a person’s intelligence.
D、persons having identical brains will have roughly the same intelligence.
答案
C
解析
主题总结题。短文开篇讲述智力情况虽然有天生的因素,但是后天的教育对其有很大的影响。在最后又说:如果给予平等的机会,有相同的大脑,智力水平应该是大致相当的。因此可知,全文主要在说后天环境对人的智力发展起着决定性的作用,选项C为正确答案。
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