单项选择题
An automated diesel engine should normally shut down due to （）
A.low lube oil temperature B.high ambient air temperature C.low tube oil pressure D.high exhaust system back pressure
单项选择题 The minimum speed an engine must attain before ignition can occur depends upon （）.
单项选择题 For a given size engine, the two-stroke/cycle diesel engine will deliver more power than a four-stroke/cycle diesel engine because （）.
单项选择题 Lube oil cannot be efficiently filtered if its （）.
