单选题To lubricate the swivel or remove corrosion from a fire hose coupling，you should use（）.AglycerineBgraphiteCkeroseneDfresh water and soap
单选题
To lubricate the swivel or remove corrosion from a fire hose coupling，you should use（）.
A
glycerine
B
graphite
C
kerosene
D
fresh water and soap
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