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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

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（）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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（）refers to the tendency of a body of the ship to return to its original position after it is displaced therefrom.

A.Stability
B.Responsibility
C.Liability
D.Visibility

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