问题
单项选择题
DSC distress acknowledgements are normally transmitted by（）in respond to a receiver DSC distress call.
A.Ship stations
B.Coast stations
C.NCSs
D.NCC
答案
参考答案：B
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DSC distress acknowledgements are normally transmitted by（）in respond to a receiver DSC distress call.
A.Ship stations
B.Coast stations
C.NCSs
D.NCC
参考答案：B