题目内容

什么是对比法?其优势和效能如何?

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我国图书馆读者工作基本原则之三是()的原则。

(),即是用线,()、带子交织制作工艺品。

储集层为砂岩时,一般根据砂岩粒度大小划分为几类?

A vessel towing where the tow prevents her from changing course shall carry().

A. only the lights for a vessel towing
B. only the lights for a vessel restricted in her ability to maneuver
C. the lights for a towing vessel and the lights for a vessel restricted in her ability to maneuver
D. the lights for a towing vessel and the lights for a vessel not under command

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