單項(xiàng)選擇題A fuel-air mixture below the lower explosive limit is too().

A.rich to burn
B.lean to burn
C.cool to burn
D.dense to burn


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1.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

2.單項(xiàng)選擇題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

3.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

4.單項(xiàng)選擇題A high cube container is designed specifically to().

A.carry low density cargoes
B.protect fragile cargoes
C.stow cargoes with concentrated weights such as machinery
D.carry cargoes of very low stowage factors

5.單項(xiàng)選擇題A hook that will release quickly is a().

A.longshore hook
B.margin hook
C.marginal hook
D.pelican hook