---I’ve joined a gymnastic class at our local fitness center. It’s a great way to keep fit. Want to join us?

--- ____  Gymnastic is for girls. I’d rather do some weight.

A．No wonder.

B．No way!

C．Never mind.

D．No problem.

分离效率高，适用于含粒径很小的不溶性微粒或黏度大的料液，或两种密度不同而且不相混溶的液体混合物分离的方法是（）

A.沉降分离

B.离心分离

C.常压滤过

D.减压滤过

E.加压滤过