使用清洁剂时,请使用呼吸设备。( )
A.When you work with cleaning agents, use breathing equipment. B.When you perform with cleaning agent, use breathing equipment C.When you do work with cleaning agents, use breathing equipment.正确答案C
使用清洁剂时,请使用呼吸设备。( )
A.When you work with cleaning agents, use breathing equipment. B.When you perform with cleaning agent, use breathing equipment C.When you do work with cleaning agents, use breathing equipment.正确答案C
