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[填空题]There are two factors which determine an individual’s intelligence. The first is the sort of brain he is born with. Human brains (36) 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 be has (37) to learn. So the second factor is what (38) to the individual--the sort of environment in which he is reared. If an individual is hindered environmentally, it is (39) that his brain will fail to develop and he will never (40) the level of intelligence of which he is capable.
The (41) of environment in determining an individual’s intelligence can be (42) by the case of the history of the identical twins, Peter and Mark. Being identical, the twins had identical brains at birth, and their growth (43) were the same. When the twins were three months old, their parents died, and they were place
[填空题]There are two factors that determine an individual’s intelligence. The first is the sort of brain he or she was born with. Human brains differ{{U}} (36) {{/U}}. Some people’s brains are more capable than others’. But no matter how good is a brain he or she has to begin with, an{{U}} (37) {{/U}}will have a low level of intelligence unless he or she has opportunities to learn. So the second factor is what happens to the individual, that is, the sort of{{U}} (38) {{/U}}in which he or she is brought up. If an individual is handicapped environmentally, it is{{U}} (39) {{/U}}that his or her brain will fail to develop and he or she will never reach the level of intelligence which he or she is capable of.
The importance of environment in{{U}} (40) {{/U}}an individual’s intelligence can be{{U}} (41) {{/U}}by the case history of the identical twins, Peter and Mark. Because they are identical twins, they had identical brains, and their growth{{U}} (42) {{/U}}were the same, When
