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单选题
Ships’ masters are requested to ensure that during their call at this port , all discharging outlets are（）.
A
blockaded
B
opened
C
closed
D
enclosed
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单选题Always ensure that the turning gear is（）, even at the quay, the wake from other ships may turn the propeller and thus the engine.A
disengagedB
engagedC
assembledD
disassembled
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