单项选择题
A.adherence to B.adoption to C.relaying on D.usage of
The rescue coordination center may（）on stations which i...
单项选择题The rescue coordination center may（）on stations which interfere with traffic.
A.keep silence B.forbid transmission C.change information D.impose
Particular care should be（）in selecting CESs in areas w...
单项选择题Particular care should be（）in selecting CESs in areas where Ocean Regions overlap.
A.taken B.take C.took D.taked
Before GMDSS, if the radio officer on board is serious ...
单项选择题Before GMDSS, if the radio officer on board is serious ill,（）.
A.someone else will take his place B.the captain will take charge of his work C.nobody will be capable of doing his work D.anyone else will use the radio equipment
