单选题On a ship，a fire pump may be used for other purposes if（）.Athe other services are run off a reducing station with a pressure gageBa separate fire pump is available for use on the fire mainCall other services are operated by a manifold near the pumpDAll of the above
单选题
On a ship，a fire pump may be used for other purposes if（）.
A
the other services are run off a reducing station with a pressure gage
B
a separate fire pump is available for use on the fire main
C
all other services are operated by a manifold near the pump
D
All of the above
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