蒸发系统中除沫器一般位于（）

A.原料入口处

B.二次蒸汽出口

C.加热蒸汽入口

D.浓缩液出口

Which of the following is NOT a characteristic of the long-run industry supply curve（）

A. The long-run supply curve is less elastic than the short run supply curve.

B. The long-run supply curve is flatter than the short-run supply curve.

C. In the long run, there will be a greater change of quantity supplied for a given price change, than in the short run.