[单选题]正常情况下,所有燃油增压泵电门接通时,增压泵的工作是( )
how do the booster pump work when all the fuel pump switch is turned on normal condition? A.所有增压泵者一起运转
All the booster pump to run B.发动机起动前,仅备用增压泵运转Before starting the engine, only the standby pump operation C.仅主增压泵运转
Only the main booster pump operation