单项选择题
A large oil fire on the deck of a ship can be fought most effectively with（）.
A.dry chemical
B.foam
C.high-velocity fog
D.water
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A life line must be conncted to the life raft（）.
A.at the bow
B.at the stern
C.in the middle
D.all around -
单项选择题
A life raft which has inflated bottom-up on the water（）.
A.should be righted by standing on the carbon dioxide cylinder, holding the righting straps, and leaning backwards
B.should be righted by standing on the life line, holding the righting straps, and leaning backwards
C.will right itself when the canopy tubes inflate
D.must be cleared of the buoyant equipment before it will right itself -
单项选择题
A load line of a ship is assigned by the（）.
A.minerals management service
B.Department of energy
C.corps of engineers
D.a recognized classification socitey approved
