單項(xiàng)選擇題()是DSC遇險(xiǎn)呼叫頻率和無線電傳遇險(xiǎn)通信頻率.

A.6312.0/6215.0
B.2187.5/2182.0
C.8414.5/8376.5
D.12577/12290.0


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