问题
单项选择题
Which spoken emergency signal would you use to call a boat to come assist a man overboard?（）
A.Distress signal
B.Urgency signal
C.Safety signal
D.None of the above
答案
参考答案：B
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Which spoken emergency signal would you use to call a boat to come assist a man overboard?（）
A.Distress signal
B.Urgency signal
C.Safety signal
D.None of the above
参考答案：B