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單項選擇題

What can cause a lack of oxygen in a chain locker（）．

A.Absorption
B.Osmosis
C.Evaporation
D.Oxidation

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單項選擇題

Tonnage openings must be closed by means of（）.

A.Press board
B.Steel hatch boards
C.Steel plates
D.Wooden hatch boards

單項選擇題

The Vessel’s cargo holds are properly fitted with（）in way of hatches.

A.Floor-ceiling
B.Battens
C.Covers
D.Hard-wood boards

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