单选题International SafetyNet and Navtex Services promulgate MSI by means of（）.AFEC and ARQBsatellite and terrestrial communicationsCradio and telexDNBDP
单选题
International SafetyNet and Navtex Services promulgate MSI by means of（）.
A
FEC and ARQ
B
satellite and terrestrial communications
C
radio and telex
D
NBDP
参考解析
解析：
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