单项选择题
A.greater high temperature strength
B.better heat conductivity
C.greater weight per cubic inch
D.increased resistance to wear
单项选择题 Which of the combustion parameters listed is used in a diesel engine, but NOT related to the injection system?（）
单项选择题 Successful combustion inside the cylinders of a diesel engine is dependent upon （）.
单项选择题 What occurs in the combustion space of a diesel engine cylinder shortly after ignition and before the piston reaches TDC?（）