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【单选题】
固定相老化的目的是A.
除去表面吸附的水分
B.
除去固定相中的粉状物质
C.
除去固定相中残余的溶剂及其它挥发性物质
D.
提高分离效能
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反馈参考答案：
举一反三
【单选题】I advise you leave the company as soon as possible you get yourself into trouble. [ ]
A.
before
B.
until
C.
as soon as
D.
in that case
【单选题】Any suggestions for the project?()
A.
I need your advice on it.
B.
I advise you to put more hands in this project.
C.
Thanks for your suggestions.
【单选题】When you rewrite the paragraph, I advise you to leave out is thought unnecessary or misleading.
A.
where
B.
which
C.
these
D.
what
【单选题】When you rewrite the paragraph, I advise you to leave out ____ is thought unnecessary or misleading. [ ]
A.
what
B.
that
C.
these
D.
which
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