阅读理解Therearetwofactorswhichdetermineanindividual'sintelligence(个人的智力).Thefirstisthesortofbrainheisbornwith.Hunanbrainsdifferconsiderablysomebeingmorecapablethanothers.Butnomatterhowgoo

题目详情

阅读理解

　　There are two factors which determine an individual's intelligence(个人的智力). The first is the sort of brain he is born with. Hunan 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. If an individual is handicapped (妨碍) 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.

　　Demonstrated by the case history of the identical(完全相同的) 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 their parents died and they were placed in separated foster 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 to as a child sent to good schools and given every opportunity to be stimulated intellectually. This environment difference continued until the twins were in their late teens when they were given tests to measure their intelligence. Peter'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.

(1)This selection can best be titled ________.

[　　]

A．Measuring Your Intelligence

B．Intelligence and Environment

C．The Case of Peter and Mark

D．How the Brian Influences Intelligence

(2)The best statement of the main idea of this passage is that ________.

[　　]

A．human brains differ considerably

B．the brain a person is born with is important in determining his intelligence

C．environment is crucial(决定性的) in determining a person's intelligence

D．persons having identical brains will have roughly the same intelligence