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三赦之法

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水流中垂直于所有流线的横截面称为过水断面()

A. 正确
B. 错误

在构筑企业理念时,应遵循哪些基本原则?

工业化建筑体系分为()和()两种。

In some cases facilities may be provided for emergency overriding oil pressure shutdown, if this facility is used, adequate warning must be given to ().

A. the bridge watch-keeper
B. the captain
C. the chief engineer
D. the engine room staff

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