单项选择题
A quick and rapid motion of a vessel in a seaway is an indication of a(n)（）.
A.large GM B.high center of gravity C.excessive free surface D.small GZ
单项选择题 A number of bags are worn-out（）a certain extent.
单项选择题 Allowance for fresh water refers to（）.
单项选择题 A vertical shift of weight to a position above the vessel’s center of gravity will（）.
