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问题 单项选择题

设备工程设计过程进度控制就足通过设备工程设计( )来控制设计工作进度。

A．总进度计划

B．各设计单位的进度计划

C．主要部件图的进度计划

D．目标责任计划

答案

参考答案：A

单项选择题

国产常用电气测量仪表分（）级。

A.7

B.10

C.12

D.5
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单项选择题

A ship must have a self-contained breathing apparatus to be used as protection from gas leaking from a refrigeration unit. To meet this requirement，you may use（）.

A.a gas mask certified by the Mine Safety and Health Administration

B.the same self-contained breathing apparatus required with the fireman's outfit

C.an oxygen breathing apparatus，provided that the device has been inspected within three years

D.a portable ventilation system that will provide a complete change of air every three minutes
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