A.0 degrees
B.10 degrees
C.20 degrees
D.30 degrees
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A.shown
B.expressed
C.appeared
D.displayed
A.a room
B.room
C.rooms
D.the room
A.ample
B.sufficient
C.enormous
D.incredible
A.course
B.track
C.direction
D.trend
A.replaces directional signals
B.makes the other vessel the stand-on vessel
C.indicates doubt as to another vessels actions
D.is the same as a MAYDAY signal
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When testing a Class A EPIRB you will know the EPIRB is working properly if you hear on 99.5 Mhz FM or any vacant frequency on a nearby AM radio（）.
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There is something wrong with our radar．All kinds of objects can’t be clearly（）within the definite range.
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What form of ice is of land origin?（）
The radiotelephone safety message urgently concerned with safety of a person would be prefixed by the word（）.
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