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單項(xiàng)選擇題

A continuous watertight bulkhead is normally also a (n)（）.

A.structural bulkhead
B.exterior bulkhead
C.certerline bulkhead
D.joiner bulkhead

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單項(xiàng)選擇題

A crack in the deck plating of a vessel may be temporarily prevented from increasing in length by（）.

A.cutting a square notch at each end of the crack
B.drilling a hole at each end of crack
C.slot-welding the crack
D.welding a doubler over the crack

單項(xiàng)選擇題

A dangerous cargo manifest is needed for you to carry a combustible cargo. You should obtain the shipping papers to mark this manifest from the（）.

A.manufacturer
B.CCS
C.HAS
D.shipper

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