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
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单项选择题
When a vessel’s LCG is aft of her LCB，the vessel will（）.
A.trim by the stern
B.trim by the head
C.be on an even keel
D.be tender -
单项选择题
What provides the majority of strength to an aluminum-sided container?（）.
A.Corner fittings
B.Framework，primarily the corner posts
C.Framework and siding acting as a girder
D.Aluminum side and end panels
