单项选择题

A floating vessel will behave as if all of its weight is acting downward through the（）.

A.center of gravity
B.center of buoyancy
C.center of flotation
D.metacenter

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单项选择题
A continual worsening of the list or trim indicates（）.

A.negative GM
B.progressive flooding
C.structural failure
D.an immediate need to ballast
单项选择题
（）we have worked out the loading plan，we shall start doing more revision work.

A.For now
B.Ever since
C.Now that
D.By now
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