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野外（室外）γ射线工业探伤如何划分控制区和监督区？

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Nothing in these Rules shall（）any vessel，or the owner，master or crew thereof，from the consequences of any precaution which may be required by the ordinary practice of seaman，or by the special circumstances of the case.

A. exonerate
B. exhaust
C. exercise
D. examine

简述遥测量死区计算的必要性？

水冷壁内壁结垢，热阻增大，会使炉膛温度升高。

A. 正确
B. 错误

W11-4油田的泡沫/水消防管网正常压力保持在（）Kpa。

A. 700
B. 800
C. 900
D. 1000