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單項(xiàng)選擇題

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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單項(xiàng)選擇題

A continual worsening of the list or trim indicates（）.

A.negative GM
B.progressive flooding
C.structural failure
D.an immediate need to ballast

單項(xiàng)選擇題

（）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