He cleaned the old machine and _______ the moving parts with a little mineral oil, hoping that it could work again.( )
A: lubricated
B: lubrication
C: lubricate
D: lubricating
A: lubricated
B: lubrication
C: lubricate
D: lubricating
举一反三
- He cleaned the old machine and ________ the moving parts with a little mineral oil, hoping that it could work again. A: operated B: loaded C: lubricated D: distorted
- He cleaned the old machine and ________ the moving parts with a little mineral oil, hoping that it could work again. A: twinkled B: lubricated C: traversed D: emancipated
- He cleaned the old machine and ( ) the moving parts with a little mineral oil, hoping that it could work again. A: delete B: contribute C: demonstrate D: lubricate
- He cleaned the old machine and_________ the moving parts with a little mineral oil, hoping that it could work again
- Lubricating oil systems for diesel engine journal bearings are usually lubricated by which of the following types of lubricating oil systems?（）