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推行“四知四清四掌握”工作机制的重要意义是什么?

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The pollution prevention regulations state that slop oil and sludge that result as part of normal fueling operations should be disposed of by ()

A. discharging ashore into the sewer system
B. sealing in disposable plastic barrels aboard ship
C. discharging into a shore tank or stop barge
D. dumping into the ship’s bunker tank

关中唐十八陵

烧结类风机油泵必须在风机起动前()后起动风机。

A. 5分钟
B. 10~15分钟
C. 15~20分钟

轴上封闭键槽的深度有多种标注方法,用游标卡尺可直接测量获得的槽深是以()为基准标注。

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