A.purging with hydrocarbon gas
B.gas-freeing operations
C.maintaining an inert condition
D.full line draining and mopping up of any water
第1题
A.Diminishing the height of the seas
B.Lengthening the distance between successive crests
C.Increasing the height of the seas
D.Preventing the wave crests from breaking
第2题
A.Clear syrupy liquid with no odor
B.Colorless-to-brown liquid with a choking odor when hot
C.Colorless liquid with a pleasant fruity odor
D.Whitish liquid with a faint,pleasant odor
第3题
A.Normal water supply at the water seal is lost
B.The temperature of the inert gas being delivered to the cargo tanks is more than 150℉
C.The cooling water supply to the scrubbers is lost
D.All of the above
第4题
A.not close
B.not closing
C.not have closed
D.no closing
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