单项选择题
A.transferring drill water
B.dumping bulk materials
C.pumping out flooded compartments
D.evacuating the unit
单项选择题 On a vessel，the keel is the primary strength member of the lower hull form in which direction?（）.
单项选择题 On a bulk chemical carrier，water should NOT be used as an extinguishing agent to fight a fire if the water may come into contact with the chemical called（）.
单项选择题 Oceangoing dry bulk cargo vessels over 1000 GT must have approved combination-type fire nozzles at all（）.