Excessively worn, or polished ends on a diesel engine valve spring, indicate______.A.burne

Excessive lube oil consumption can result from worn or broken ______________.A.piston ring

One end of a cylinder for a medium or high－speed diesel engine is sealed by the piston and

Because a circle has no beginning or end, the wedding ring is a symbol of love.A．extravaga

I am terribly ______ after a whole days working.A．worn awayB．worn downC．worn outD．worn off

The word （) means "to come to an end in time or effect ".A、trespassB、tortfeas

I polished my buttons with a handkeichief.