Aunt Mary is crazy about shopping. She must be snapping up the bargains in the department store during such a sale,           ?

A．mustn’t she?

B．isn’t she

C．needn’t she

D．doesn’t she

槽车装车超量的处理不正确是（）。

A、应立即通知停泵、关死泵进出口阀

B、立即关死鹤管阀门

C、汽车槽车装车超量可发车

D、将该槽车内的超装油品用胶管引流到低位卧罐或装桶