—We experienced a freezing cold winter this year.

—Oh, yes. I think ______ is the power of global warming that the climate goes from one extreme to

the other. [ ]

A. such        

B. this          

C. so            

D. it

（）是指教师按照准备好的讲稿系统地向受训者传授知识的方法。

A.讲授法

B.专题讲座法

C.研讨法

D.案例研讨法