why do some stations keep silence?（）<br>A:Because they are not engaged in the distress traffic<br>B:they will affect the transmission of the distress traffic<br>C:The powers of these stations are very weak<br>D:They are not in charge of search and rescue

why do some stations keep silence?（）
A:Because they are not engaged in the distress traffic
B:they will affect the transmission of the distress traffic
C:The powers of these stations are very weak
D:They are not in charge of search and rescue

出自：海船船员证

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