多项选择题

下列方法中属于统计抽样方法的有：

A.随机选样
B.分层选样
C.属性抽样
D.变量抽样
E.系统选样
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听力原文：M: I think I've got this experiment set up right now.W: You only think it's right? In chemistry you've got to be surE.What's the woman suggesting to the man?A.He should not do the experiment after all.B.He must be extremely careful.C.She will help him do the experiment.D.She's sure he is right
A.W:
B.
What's
C.He
D.
B.He
E.
C.She
F.
D.She's
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听力原文：M: I'm terribly sorry. I lost the magazine you lent me the other day.W: It doesn't matter. I've read it.M: I've tried to get another copy but couldn't find onE.Why is the man feeling sorry?A.He couldn't get a copy of the magazine the girl wants.B.He wants to read the magazine again.C.He has lost the woman's magazinE.D.He has lent the magazine to his frienD.
A.W:
B.
M:
C.
Why
D.He
E.
B.He
F.
C.He
G.
D.He
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