问题
单项选择题
Any person maintaining a listening watch on a bridge to bridge radio-telephone must be able to（）.
A.Speak English
B.Repair the unit
C.Speak Spanish
D.Send Morse code
答案
参考答案：A
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Any person maintaining a listening watch on a bridge to bridge radio-telephone must be able to（）.
A.Speak English
B.Repair the unit
C.Speak Spanish
D.Send Morse code
参考答案：A