A.inherent characteristics
B.weight
C.destination
D.danger to humans
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A.reduces and prevents corrosion of standing rigging
B.prevents corrosion of running rigging
C.reduces and prevents wear caused by the rubbing of one object against another
D.protects the body against extreme cold
A.for portable fenders
B.for ground tackle
C.on the inside of the hawsepipe
D.on mooring lines
A.anchor the boat
B.pick up heavy loads
C.protect fiber rope from abrasion
D.strengthen mooring lines
A.jibing
B.running before the wind
C.tacking
D.reefing
A.allowed
B.forbidden
C.approved
D.disliked
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According to the relevant regulation, lifeboat should be powered by（）.
The helm command PORT TWENTY means（）.
（）is the act of allocating space to containers on board of a container ship in the order of the discharge ports.
The mean draft of a ship is the draft（）.
When the wave period and the apparent rolling period are the same（）.
（）is where the crew eat their meals.
Berthing means bringing a vessel to her berth until（）.
In the Northern hemisphere northerly winds may cause temperature（）.
The circulation around a low pressure center in the Northern Hemisphere is（）.
Despite the rising importance and great convenience of the gyrocompass,the magnetic compass still retain its importance because of its（）.