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
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