單項(xiàng)選擇題

A gas-free certificate would usually be issued by a (n)（）.

A.CCS marine surveyor
B.certified marine chemist
C.port engineer
D.HAS marine inspector

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A half-height container is used（）.

A.to carry cargoes of low density
B.when stowage space is limited
C.to carry cargoes such as steel products or drums
D.to double the stowage capacity of the vessel

單項(xiàng)選擇題

A heated bulkhead has the effect on a hygroscopic commodity of（）.

A.causing moisture to accumulate against bulkhead
B.lowering the vapor pressure of the commodity
C.lowering the dew point of the air
D.raising the vapor pressure of the commodity