单项选择题
A.keel B.virgin C.origin D.base
Please（）search and rescue.A.make command ofB.take comma...
单项选择题Please（）search and rescue.
A.make command of B.take command of C.get command of D.have command of
MERSAR is replaced by（）.A.IAMSARB.COMSARC.ICAO SARD.197...
单项选择题MERSAR is replaced by（）.
A.IAMSAR B.COMSAR C.ICAO SAR D.1979 SAR
In case of your steering gear failed，（）should be exhibi...
单项选择题In case of your steering gear failed，（）should be exhibited in shapes or lights.
A.not under command B.restricted in her ability to manoeuvre C.restrained by her draught D.underway
