单选题Prior to entering a cargo pump room, you should ensure that （）.Athe forced ventilating system is operatingBthe cargo pumps are securedCno monocarbon gases are presentDthe oily water separator is de-energized
单选题
Prior to entering a cargo pump room, you should ensure that （）.
A
the forced ventilating system is operating
B
the cargo pumps are secured
C
no monocarbon gases are present
D
the oily water separator is de-energized
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