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A a long afternoon nap B the peak production of melatonin C poor health D low sleep efficiency E good sleep efficiency F exposur
A a long afternoon nap B the peak production of melatonin C poor health D low sleep efficiency E good sleep efficiency F exposur
admin
2016-08-16
22
问题
A a long afternoon nap
B the peak production of melatonin
C poor health
D low sleep efficiency
E good sleep efficiency
F exposure to blue light
A strong desire to sleep in the afternoon is the result of______.
选项
答案
B
解析
句意:下午感觉十分困倦是褪黑素分泌高峰的结果。根据最后一段“One of the biggestpeaks in melatonin production happens during the 1 to 3 pm time frame,which explains whymost people feel sleepy in the afternoon”可知,褪黑素产生的高峰是每天下午1~3点,这也是为什么大部分人会在下午感到困倦的原因。故选B。
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职称英语卫生类A级题库职称英语分类
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