— Oh, it’s you. I__________ you. Why are you looking so thin and pale?

— I’ve been ill for weeks and still under treatment.

A．can’t recognize

B．could hardly recognize

C．haven’t recognized

D．wasn’t recognizing

下列用于中药提取液中药物分子分离的滤过方法是

A．微孔滤膜滤过

B．石棉板滤过

C．超滤法

D．垂熔滤器滤过

E．离心分离