下列选项中,( )一般不能作为ETF的发起人。

听力原文：David is not to be seen in this lab from tomorrow, is he?(A) No, he took a job offer at Wesley.(B) Let's wrap up this meeting here.(C) Yes, he has an appointment tomorrow.(8)A． B． C．

A.
(B)
B.
(C)
C.
(8)
A．

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混凝土的抗压强度制作试块的最小尺寸应根据()而定。A.混凝土量B．混凝土强度C．集料粒径D．试模###SX

A.混凝土量
B．混凝土强度
C．集料粒径
D．试模
B.
C.
D.

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