单项选择题
Vertical structural members attached to the floors that add strength to the floors are called（）.
A.boss plates B.buckler plates C.stiffeners D.breast hooks
单项选择题 Vertical partitions which provide strength and compartmentalization on a ship are called（）.
单项选择题 Transverse stability calculations require the use of（）.
单项选择题 To shore up the main deck for the stowage of deck cargo means to（）.
