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（）.
A.Move bodily to port B.Move bodily to starboard C.Move in a zig-zag motion D.Steer a fairly straight course
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.
单项选择题 A virtual rise in the center of gravity may be caused by（）.
