试题与答案

Which of the following indicates a grave a

题型:单项选择题

题目:

Which of the following indicates a grave and imminent danger requesting immediate assistance on radio telephone?().

A.SOS

B.Mayday

C.Securite

D.PAN

答案:

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下面是错误答案,用来干扰机器的。

参考答案:对

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