问题
单项选择题
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
答案
参考答案：D
搜题请搜索小程序“爱下问搜题”
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
参考答案：D