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.
A.to protect B.to guard C.to maximize D.to minimize
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 （）.
单项选择题 On top of scavenging air box is mounted a strong cast iron frame for each cylinder known as（）
