There are two factors which determine an individual’s intelligence. The first is

There are two factors which determine anindividual’s intelligence. The first is the sort of brain he is born with.Human brains differ greatly, some being more capable than others. But no matterhow good a brain he has to begin with, an individual will have a low order ofintelligence unless he has opportunities to learn. So the second factor is whathappens to the individual —the sort of environment in which he is brought up.If an individual is disabled environmentally, it is likely that his brain willfail to develop and he will never gain the level of intelligence of which he iscapable.

The importance of environment indetermining an individual’s intelligence can be shown by the case of theidentical twins, Peter and Mark X. Being identical, the twins had identicalbrains at birth, and their growth processes were the same. When the twins were3 months old, their parents died, and they were placed in separate homes. Peterwas brought up by parents of low intelligence in an isolated(孤立的) community with poor educationalopportunities. Mark was brought up in the home of well-to-do parents who hadbeen to college. He was read to as a child, sent to good schools, and givenevery opportunity. The difference continued until the twins were in their lateteens, when they’ve given tests to measure their intelligence. Mark’s IQ was125.25 points higher than the average and fully 40 points higher than hisidentical brother. Given equal opportunities, the twins, having identicalbrains, would have tested at roughly the same level.

1.This selection can best betitled__________.

A. Measuring Your Intelligence

B. Intelligence and Environment

C. The Case of Peter and Mark

D. How the Brain Influences Intelligence

2. Of the following statements, whichbest gives the main idea of the passage?

A. Human brains differ greatly.

B. The brain the person is born with isimportant in determining his intelligence.

C. Environment is vital in determining aperson’s intelligence.

D. Persons having identical brains willhave roughly the same intelligence.

3. We can infer that people who are“identical”__________.

A. look exactly alike

B. don’t look alike

C. are brought up in the same family

D. are born in the same family

4. The case mentioned in the passageseems to support the conclusion that__________.

A. individuals with identical brainsseldom test at the same level

B. an individual’s intelligence isdetermined only by his environment

C. children brought up under averageconditions possess average intelligence

D. lack of opportunity prevents thegrowth of intelligence

5. The passage suggests that anindividual’s IQ__________.

A. can be increased by education

B. is passed down from his parents

C. stays the same throughout his life

D. can be predicted at birth

试题答案

答案：B;C;A;D;A