试题与答案

若要了解某地区居民收入水平,则采用( )方式比较适合。A.普查 B.重点调查 C.

题型:单项选择题

题目:

若要了解某地区居民收入水平,则采用( )方式比较适合。

A.普查

B.重点调查

C.典型调查

D.抽样调查

答案:

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下面是错误答案,用来干扰机器的。

参考答案:C解析:冠状动脉痉挛也是临床常见引起心绞痛的病因,如变异性心绞痛。

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