Question

8．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（撫養(yǎng)）．If an individual is handicapped 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 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（寄養(yǎng)） 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 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 teens，when they were given tests to measure their intelligence．Mark's I．Q．was 125，twenty-five points higher than the average and forty points higher than his identical brother．Given equal opportunities，the twins，having identical brains，would have tested at roughly the same level．
65．According to the passage，the average I．Q．isB．
A.85               
B.100             
C.110                     
D.125
66．This passage suggests that individual's I．Q．D．
A．can be predicted at birth                    
B．is inherited from his parents
C．stays the same throughout his life           
D．can be increased by education
67．This passage can best be titledB．
A．Measuring Your Intelligence              
B．Intelligence and Environment
C．The Case of Peter and Mark               
D．The Introduction of the I．Q．Test．

Answer 1

分析 本文是一篇科教類閱讀，有兩個因素決定一個人的智力．第一個是出生時就有的智力，不同的人大腦大大不同，有些是比其他人更有能力．本文以此展開談?wù)�，主要講述了智力與后天環(huán)境的關(guān)系．

解答 65．答案：B．細(xì)節(jié)理解題：從最后一段的句子：Mark's I．Q．was 125，twenty-five points higher than the average 可知，平均智商是100．故選B．
66．答案：D．細(xì)節(jié)理解題：從第二段的句子：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．可知人的智商是可以通過教育提高的．故選D．
67．答案：B．主旨大意題：閱讀全文，從每段的段首，可以看出這篇文章講的是智力和環(huán)境的關(guān)系．故選B．

點評 本文是一篇科教類閱讀，題目涉及多道細(xì)節(jié)理解題．主旨大意題．做題時學(xué)生應(yīng)仔細(xì)閱讀原文，把握文章主要內(nèi)容，聯(lián)系文章上下文內(nèi)容并結(jié)合所給選項含義，從中選出正確答案，一定要做到有理有據(jù)，切忌胡亂猜測．