It is abnormal that when the engine is being turned by the turning gear or by hand， （）.
举一反三
- Before starting an engine by air, the engine must（） A: be turned by a turning gear for at least one minute B: be turned by a turning gear for at least two minutes C: be turned at least one complete turn D: be turned at least two complete tur
- An interlock in the remote operating valve line stops the valve （） when the engine turning gear is engaged.
- When turning the engine with turning gear， you should keep the indicator cocks （）. A: attached to the indicators B: opened C: closed D: broke
- When I ________ on the radio yesterday evening,a new song _________. A: turned, was taught B: turned, was being taught C: was turning, has been taught D: was turning, had been taught
- Before engaging the turning gear and turning the diesel engine, which of the following operation should be done except______.