—David has made great progress recently.

—       ,and       .

A．So he has;so you have

B．So he has;so have you

C．So has he;so have you

D．So has he,so you have

下列影响蛋白质变性的因素中，属于可逆变性的是（）

A.界面作用

B.表面活性剂作用

C.还原剂作用

D.静高压作用