单项选择题

The inhabitants don’t like discomfort, and have developed advanced techniques to make summer life tolerable; air-conditioning is one of the symbols of a home or office or factory that are based on reasonable economic success.
A、正确
B、错误

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单项选择题

（）是防洪的非工程措施。

A.修筑堤防

B.修建水库

C.洪水预报

D.整理河道

亨廷顿舞蹈症是性连锁遗传病。

答案：错误