问题
单项选择题
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
答案
参考答案：B
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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
参考答案：B