—Can you imagine ____________the Taiwan HEDP(塑化剂) event will affect our life?

—I’m not sure. Many people have begun to have water instead of drinks.

A．how far

B．how many

C．how often

D．how much

带活塞式膨胀机的中压流程的中小型空分设备，控制制氧液面高度的手段是操作（）和（）。