单项选择题
A cofferdam is（）.
A.any deck below the main deck and above the lowest deck B.a member that gives fore-and-aft strength C.made by placing two bulkheads a few feet apart D.a heavy fore-and-aft beam under the deck
单项选择题 When a vessel’s LCG is aft of her LCB，the vessel will（）.
单项选择题 What provides the majority of strength to an aluminum-sided container?（）.
