单项选择题
A.bulwark B.bulkhead C.bitumen D.waterline
The （）has four blades.A.windlassB.steerC.propellerD.hel...
单项选择题The （）has four blades.
A.windlass B.steer C.propeller D.helm
The main body of a vessel is the （）.A.hullB.superstruct...
单项选择题The main body of a vessel is the （）.
A.hull B.superstructure C.engine room D.poop
Sailors should keep （）at sea.A.lookoutB.outlookC.uplook...
单项选择题Sailors should keep （）at sea.
A.lookout B.outlook C.uplook D.lookup
