Human facial expressions differ from those of animals in the degree ____which they can be controlled on purpose.

问题描述:

Human facial expressions differ from those of animals in the degree ____which they can be controlled on purpose.
A.with B.to C.of D.for

B to some degree固定搭配
人类的面部表情和动物的面部表情就可控制的程度来说是不一样的.