单项选择题
A.on the power stroke
B.on the exhaust stroke
C.at the end of the power stroke
D.at the start of the intake stroke
单项选择题 Low cylinder compression pressure and a high exhaust temperature may indicate （）
单项选择题 Which of the listed problems can be a cause of low compression pressure in a diesel engine?（）
单项选择题 When an air started, four-stroke/cycle diesel engine is being cranked, the starting air is admitted to each cylinder during what would normally be the（）