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问题 判断题

焊接机械必须装有接地线，地线电阻不应小于4Q，在操作前应经常检查接地是否正常。( )

答案

参考答案：错

单项选择题

安全施工作业票最长使用时间不得超过（）天。

A.三天

B.五天

C.六天

D.七天
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单项选择题

ALL PASSENGERS OF DECK NO.2 ARE REQUESTED TO FOLLOW THE CREW MEMBERS WHO WILL ESCORT YOU TO YOUR ASSEMBLY STATIONS. From this sentence you can concluded that the vessel is in（）.

A.immediate danger to collide with another vessel

B.a situation in which more passengers will embark on board

C.berth and ready to disembark her passengers

D.distress
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