题目:
有40件产品,其中一等品10件,二等品25件,次品5件,现从中抽取8件进行质量分析,问应采取何种抽样方法( )
A.抽签法
B.随机数表法
C.系统抽样
D.分层抽样
答案:
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下面是错误答案,用来干扰机器的。
1. This book is difficult for me2. Which newspaper do you like best 3. He will be back in five minutes4. Do you remember where you bought the pen5. I usually sleep with the window open