—Do you think it's a good idea to make friends with your students?

—________,  I do. I think it's a great idea.[ ]

A. Really  

B. Obviously

C. Actually  

D. Generally

以下哪一种休克不属于病因学分类（）。

A.低血容量性

B.心源性

C.过敏性

D.阻塞性

E.神经源性