单项选择题
A.a room B.room C.rooms D.the room
There is not（）depth of water around the area centered a...
单项选择题There is not（）depth of water around the area centered at the lighthouse.
A.ample B.sufficient C.enormous D.incredible
The vessel was drifted off from her（）due to strong wind...
单项选择题The vessel was drifted off from her（）due to strong wind.
A.course B.track C.direction D.trend
The use of the danger signal（）.A.replaces directional s...
单项选择题The use of the danger signal（）.
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
