When I got to the checkout counter, I realized I didn’t have enough money, so I kept ________ I really needed and left the rest．

A．what

B．which

C．that

D．this

L型活塞式压缩机轴瓦的润滑方式是（）

A.滴点润滑

B.油环润滑

C.飞溅润滑

D.压力润滑