2. 专升本
  3. Researchers have found that REM (rapid eye movement)sleep is important to human beings. This type of sleep generally occurs four

Researchers have found that REM (rapid eye movement)sleep is important to human beings. This type of sleep generally occurs four

admin2012-01-31  62
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 changes 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 there 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?
选项 A、Once
B、Twice
C、Four or five times
D、Forty times
答案C
解析 根据文中第一段第二行的提示，可知REM一晚上发生四到五次。
转载请注明原文地址:https://www.kaotiyun.com/show/6llC777K
本试题收录于： 英语题库成考专升本分类
0

英语

成考专升本

相关试题推荐
随机试题
最新回复(0)