The case history of the twins appears to support the conclusion that _____.
A、individuals with identical brains seldom test at the same level
B、an individual’s intelligence is determined only by his environment
C、lack of opportunity blocks the growth of intelligence
D、changes of environment produce changes in the structure of the brain
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试题解析
由文章最后一句“Given equal opportunities, the twins, having identical brains, would have tested at roughly the same level.”可以推出,机会的缺乏阻碍智力的发展。