单项选择题 With respect to diesel fuel, the ease with which a cold engine will start is dependent upon the（）

单项选择题 A two-stroke/cycle diesel engine requires less starting air than a four-stroke/cycle diesel engine, of equal displacement, because the two-stroke/cycle diesel engine（）

单项选择题 Which of the following operating conditions can occur when shims are removed from the joint between the foot of a marine type diesel engine connecting rod and the bearing box?（）