---Would you mind giving your advice on how to improve our business management?

---If you make ______ most of the equipment, there will be ______ rise in production．

A．/; /

B．the; a

C．/；a

D．the; /

气割时切割速度过快则会造成（）。

A．割缝边缘熔化

B．后拖量较小

C．后拖量较大

D．无影响