2. 学历类
  3. Researchers have found that REM (rapid e

Researchers have found that REM (rapid e

考试题库2022-08-02  48
问题 Researchers have found that REM (rapid eye movement) sleep is important to human beings. This type of sleep generally occurs four or five times during one night of sleep lasting five minutes to forty minutes for each occurrence. The deeper a person's sleep becomes, the longer the periods of rapid eye movement.　　There are physical charges in the body to show that a person has changed from NREM (non-rapid eye movement) to REM sleep. Breathing becomes faster, the heart rate increases, and, as the name implies, the eyes begin to move quickly.　　Accompanying these physical changes in the body is a very important characteristic of REM sleep. It is during REM sleep that a person dreams.According to the passage, how often does REM sleep occur in one night?（　　）A. Once.B． Third.C． Four or five times.D． Uncountable.
选项 A. Once.
B． Third.
C． Four or five times.
D． Uncountable.
答案 C
解析 根据文章第一段第二句，可知REM一晚上发生四到五次。
转载请注明原文地址:https://tihaiku.com/xueli/2673415.html
本试题收录于： 英语专升本题库专升本成考分类

英语专升本

专升本成考

相关试题推荐
随机试题
最新回复(0)