单选题A fire hose has a（）.Amale coupling at both endsBfemale coupling at both endsCfemale coupling at the nozzle end and a male coupling at the hydrant endDmale coupling at the nozzle end and a female coupling at the hydrant end
单选题
A fire hose has a（）.
A
male coupling at both ends
B
female coupling at both ends
C
female coupling at the nozzle end and a male coupling at the hydrant end
D
male coupling at the nozzle end and a female coupling at the hydrant end
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