题目内容

保护跳闸出口压板投入前应()

A. 测量压板两端电压正常
B. 测量压板两端对地电压正常
C. 测量压板一端对地无电压,另一端对地负电压

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锚链、刮板输送机必须配有哪些保护装置?

In the Northern Hemisphere you are caught in the dangerous semicircle of a storm with plenty of sea room available. The best course of action is to bring the wind on the().

A. port quarter and make as much headway as possible
B. starboard quarter and make as much headway as possible
C. starboard bow and make as much headway as possible
D. port bow and make as much headway as possible

1945年8月9日,毛泽东发出()的声明,号召“中国人民一切抗日力量应举行全国规模的反攻,密切而有效地配合苏联及其他盟国作战。”

A. 《团结起来,争取抗战的最后胜利》
B. 《对日宣战》
C. 《对日寇的最后一战》
D. 《团结起来,夺取抗战的最后胜利》

气焊时氧气的纯度不能低于88.5%。

A. 正确
B. 错误

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