单项选择题
In ship construction，bulkheads in the quarters are generally（）.
A.structural B.watertight C.non-structural D.continuous
单项选择题 In a twin screw ship going half-ahead，both screws turning outboard and the rudder amidships，no current or wind，the vessel will（）.
单项选择题 Flanking rudders effect a vessel’s heading because of the（）.
单项选择题 As to the stained plates，the fault lies（）you.
