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【单选题】
只需烘干就可称量的沉淀,选用()过滤。A.
定性滤纸
B.
定量滤纸
C.
无灰滤纸
D.
玻璃砂芯坩埚漏斗
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反馈参考答案：
举一反三
【单选题】Maintenance and on-going operations are crucially important to projects and should:
A.
A be included as an activity to be performed during the project closure phase .
B.
have a separate phase in the project life-cycle because a large portions of life-cycle costs are devoted to maintenance and operations .
C.
not be view as part of a project-a project is temporary with a definite beginning and end .
D.
be view as a separate project .
【单选题】I agree with _____ of what you said, but I don't agree with _____. [ ]
A.
most, nothing
B.
most, everything
C.
something, most
D.
everything, most
【简答题】在作者笔下,瞿塘峡、巫峡和西陵峡各有什么特点?
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