题目内容

炸弹探测设备是一种专门用于探测爆炸物的装置。

A. 正确
B. 错误

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工作场地设立信号标志,白天用红旗,晚上用()

对委派会计实行报告制度,分为月度报告、工作总结、()。

A. 半年工作报告
B. 年度工作报告
C. 重大事项报告
D. 紧急情况工作报告

怎样进行体育摄影?

A vessel servicing a pipeline during the day shall display().

A. three black shapes in a vertical line; the highest and lowest are balls,and the middle one is a diamond
B. three shapes in a vertical line; the highest and lowest are red balls,and the middle one is a white diamond
C. three black balls in a vertical line
D. two black balls in a vertical line

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