单项选择题
Once all cylinders are firing regularly, （） is shut off.
A.the exhaust valve B.the starting air C.the inlet valve D.the fuel oil
单项选择题 Once a scavenge fire is detected, fuel should be shut off from the affected cylinders and cylinder lubrication increased （） the risk of seizure.
单项选择题 Once a scavenge fire is detected the engine （）.
单项选择题 Once a fire is detected the engine should be slowed downOn no account （）.
