单项选择题
A.side longitudinals B.intercostals C.stiffeners D.brackets
Progressive flooding on a ship is controlled by securin...
单项选择题Progressive flooding on a ship is controlled by securing watertight boundaries and（）.
A.transferring drill water B.dumping bulk materials C.pumping out flooded compartments D.evacuating the unit
On a vessel，the keel is the primary strength member of ...
单项选择题On a vessel，the keel is the primary strength member of the lower hull form in which direction?（）.
A.transverse B.diagonal C.longitudinal D.vertical
On a bulk chemical carrier，water should NOT be used as ...
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（）.
A.acrylic acid B.benzene C.oleum D.vinyl toluene
