单项选择题
A.angularity of the piston motion
B.inertia moment from the piston
C.centerline of the cylinder
D.centerline of the king pin
单项选择题 Which of the following problems represent one possible cause of high lube oil consumption in a four stroke diesel engine?（）
单项选择题 Late fuel oil injection in a diesel engine can result in （）
单项选择题 A crankshaft whose center of gravity coincides with its center line is said to be（） Ⅰ.statically balanced Ⅱ.dynamically balanced