单选题An emergency bilge pumping system is provided and should be （） of the main bilge pumping system, according to the SOLAS 74 Convention.AdependentBin dependentCin seriesDin parallel
单选题
An emergency bilge pumping system is provided and should be （） of the main bilge pumping system, according to the SOLAS 74 Convention.
A
dependent
B
in dependent
C
in series
D
in parallel
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