单选题
What' s the reason for twins to be at a disadvantage in their intellectual development?
A、
They can only understand their own private language.
B、
They communicate with outsiders less than non-twins.
C、
There is little stimulation for them.
D、
Adults don' t like to talk with them.
【正确答案】
B
【答案解析】
[考点] 本题为事实细节题。
[解析] 文章第三段第一句指出，双胞胎之间交际太多，而与其它儿童交际过少，这使他们智力发展中存在很大的不足。
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