问题
单项选择题
Which radiotelephone signal indicates receipt of a distress message?（）
A.Roger wilco
B.Romeo，romeo，romeo
C.SOS acknowledged
D.Mayday roger
答案
参考答案：B
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Which radiotelephone signal indicates receipt of a distress message?（）
A.Roger wilco
B.Romeo，romeo，romeo
C.SOS acknowledged
D.Mayday roger
参考答案：B