单项选择题
A.raised flange at the main deck edge B.riveted crack arrester strap on all-welded ships C.riveting pattern most commonly used in ship construction D.row of plating nearest the keel
A.reduce the rolling of the vessel B.serve as the vessel's main strength member C.add strength to the bilge D.protect the vessel's hull when alongside a dock
A.garboard strake B.limber strake C.sheer strake D.stringer strake