A-A+
If the plunger or barrel of a fuel injection jerk pump becomes damaged __________.
问题详情
A.only the replacement of the entire pump would be acceptable
B.the injection pump and injection nozzle must be replaced
C.either the barrel or plunger must be replaced
D.the barrel and plunger must be replaced as a unit
请帮忙给出正确答案和分析,谢谢!