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What physiological reason for yawning is mentioned?
What physiological reason for yawning is mentioned?
admin
2016-11-17
48
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
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本试题收录于：
公共英语四级笔试题库公共英语（PETS）分类
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公共英语四级笔试
公共英语（PETS）
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要是她知道到哪里去找你就好了!
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