- 题目中心
Human facial expressions differ from those of animals in the degree _____they can be controlled on purpose.
（2分）
Awith which
Bto which
Cof which
Dfor which
参考答案：（本答案仅供参考，请以官方发布为准。）
查看答案
B
教务处理（微信）：13083065686