单项选择题
A.a restricted air intake
B.a clogged connecting rod oil passage
C.incorrect connecting rod alignment
D.high cylinder firing temperatures
单项选择题 Injection lag in a diesel engine may be caused by（）
单项选择题 Which of the following relationships should occur between the temperature developed in a combustion space, and the compression ratio of the engine?（）
单项选择题 An acceptable method of measuring for the correct rotational force applied to the connecting rod and main bearing bolts, is to use a（）