单选题
Which of the following is true according to the first paragraph?
A、
The smell of a peach can make an autistic person feel painful.
B、
Autistic persons have difficulty understanding their environment.
C、
The signs of autism begin to appear after the age of three.
D、
Behavioural therapies can be used to cure people of autism.
【正确答案】
B
【答案解析】
本题为细节提问。选项B为第一段第三句的反话正说，是答案。A项smell不对；C项begin不符原文。
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