All VHF marine band radios operate in the simplex mode，which means that（）.<br>A:only one person may talk at a time<br>B:only two persons may talk at the same time<br>C:the radio only transmits<br>D:the radio only receives

All VHF marine band radios operate in the simplex mode，which means that（）.
A:only one person may talk at a time
B:only two persons may talk at the same time
C:the radio only transmits
D:the radio only receives

出自：海船船员证

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