Which of the following is the best title of the article?

【名词&注释】

氨基酸(amino acid)、营养液(nutrient solution)、红细胞(erythrocyte)、《前赤壁赋》(pre-ode to chi bi)、正常人(normal)、欲扬先抑

[单选题]Which of the following is the best title of the article?

根据以下内容，回答下面的题目。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. REM Sleep
B. Two Types of Sleep
C. Sleepers
D. What Happens to Sleepers

查看答案&解析 查看所有试题

学习资料：

[单选题]苏轼的《前赤壁赋》的语言特色是（　　）

A. 夹叙夹议
B. 欲扬先抑
C. 骈散相间
D. 感情充沛

[单选题]

[单选题]

[单选题]全胃肠营养液中必需氨基酸和非必需氨基酸的含量是（　　）

A. 1：1
B. 1．2
C. 2：1
D. 1：3
E. 3：1

[单选题]正常人^(normal)的红细胞放入血沉快的人的血浆中，血沉将会（　　）

A. 不变
B. 增快
C. 减慢
D. 先增快后减慢
E. 先减慢后增快

本文链接：https://www.51bdks.net/show/00yk7n.html