“Before disconnecting the oil pipe, would you flush the oil retained in the pipe?” asked the oil barge owner （）

（） are commonly used in mechanical-hydraulic governor（调速器） to sense engine speeds.

A.Bulbs
B.Bulks
C.Flyweights
D.Flywheels

点击查看答案&解析

“Stand by an engine” means （）

A.“prepare to stop the engine”
B. “assemble an engine on its bedplate”
C. “make an engine ready for starting”
D. “dismantle an engine”

点击查看答案&解析