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單項(xiàng)選擇題

The cargo is now and（）found short during discharging at your port.

A.than
B.then
C.when the line pull reaches the breaking strengh of the fall
D.while

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單項(xiàng)選擇題

The center of volume of the immersed portion of the hull is called the（）.

A.center of buoyancy
B.center of floatation
C.center of gravity
D.tipping center

單項(xiàng)選擇題

The collision bulkhead shall be of（）.

A.water-tight
B.air-tight
C.fire-tight
D.oil-tight

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