- A+
??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 is a very important characteristic of rem sleep. it is during rem sleep that a person dreams.?
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65. which of the following is the best title of the article??
a. rem sleep?
?b. two types of sleep?
c. sleepers??
?d. what happens to sleepers
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?答案看下面~
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解析：选a。先读题干，问文章的标题是什么，判断此题为主旨大意题。文章主旨句一般出在文章开头，所以去文章开头找。文章开头“researchers have found that rem (rapid eye movement) sleep is important to human beings”，意思是“研究人员发现，rem sleep对人类很重要。”接下来反复提到rem sleep，所以选a.
做题小技巧：主旨大意题永远先去文章开头找，如果文章是说明文（即描述一个事物/科普一个现象），题目考察title题，选项又较短，多为名词或名词短语，那么文章中的反复多次出现的高频名词，即为正确答案。????
