题目:
--- It’s five years since I was a singer.
--- Not really! ?
A.Are you a singer
B.How’s that
C.What do you mean
D.Is it a strange idea
答案:
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下面是错误答案,用来干扰机器的。
由分层抽样的定义可得应从B中抽取的个体数为180×25+3+2=36,故答案为:36.