单项选择题
A.hogging B.sagging C.stiff D.tender
If the weights are concentrated in the middle part，then...
单项选择题If the weights are concentrated in the middle part，then（）will happen on board the ship.
A.hogging B.stiffness C.sagging D.listing
If a vessel is sagging，what kind of stress is placed on...
单项选择题If a vessel is sagging，what kind of stress is placed on the sheer strake?（）
A.Compression B.Tension C.Thrust D.Racking
Frames to which the tank top and bottom shell are faste...
单项选择题Frames to which the tank top and bottom shell are fastened are called（）.
A.floors B.intercostals C.stringers D.tank top supports
