What physiological reason for yawning is mentioned?

admin2016-11-17 51

问题 What physiological reason for yawning is mentioned?

选项 A、To exercise the jaw muscles.
B、To eliminate fatigue.
C、To get greater strength for attacking.
D、To gain more oxygen.

答案D

解析

转载请注明原文地址:https://kaotiyun.com/show/tjRd777K

公共英语四级笔试

相关试题推荐

随机试题

最新回复(0)