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问题 单项选择题

测定液化气油渍观察值可选用（）作溶剂。

A、正己烷

B、30--60℃石油醚

C、60--90℃石油醚

D、乙醚

答案

参考答案：A

选择题
I called the public service center and they sent someone to help _____, _____ surprised me very much.
A. at no time, that
B. in no time, that
C. at no time, which
D. in no time, which
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单项选择题

股权投资基金募集期间，信息披露义务人应当披露基金管理人近（）年的诚信情况说明。

A.1

B.2

C.3

D.4
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