单项选择题
A.liquid in the cylinder
B.low compression in the cylinder
C.high exhaust temperature
D.poor fuel penetration
单项选择题 Which of the following operation will have a direct impact on the rate of wear in a cylinder liner （）
单项选择题 Which of the following reasons represents why the designed compression ratio of a gasoline engine is lower than that of a diesel engine?（）
单项选择题 The exhaust system of a diesel engine is usually designed to remove exhaust gases and to （）