单选题The fire pumps must be capable of delivering a total quantity of water at a defined head, not less than （） of the total bilge pumping capacity.Aone-thirdBtwo-thirdsCone-fourthDtwo-fourths
单选题
The fire pumps must be capable of delivering a total quantity of water at a defined head, not less than （） of the total bilge pumping capacity.
A
one-third
B
two-thirds
C
one-fourth
D
two-fourths
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