题目内容
Do you know why you sleep? You may think it's because you're tired. Or perhaps you've been told sleep
is good for you. Yet no one knows exactly why or how people sleep.
Until the early 1950s, most scientists thought the body and brain rested during sleep. Then a scientist
watched people sleep. He noticed that during periods of between 5 and 30 minutes, sleepers' eyes made
rapid movements, as if they were watching something. He called these periods REM (Rapid Eye Movement)
sleep. He called periods when sleeper's eyes did not move non-REM sleep.
Whenever the scientist woke people during REM sleep, they were having vivid dreams. Measurements
showed that sleepers' pulses (脉搏) went up quickly during REM sleep. Their breathing, heartbeat, and the
blood going to the brain also increased. Far from being a time of rest, sleep is a time when the body is hard
at work. Scientists still don't know the reason for this. Some believe REM sleep makes learning easier.
Babies spend a lot of time on REM sleep. Because of this, some scientists believe that REM sleep helps
the brain grow. Others think REM sleep is a time for the brain to empty the day's garbage.
One thing all the scientists agree on is that sleep is necessary. Without enough sleep, people make
mistakes. Most car accidents happen during the early morning hours, when people are sleepiest.
B. sleep
C. increase
D. stay the same
B. large
C. empty
D. clear anti lively
B. Paragraph 2
C. Paragraph 3
D. Paragraph 4
B. about the scientific research of REM sleep
C. about how to empty the day's garbage
D. that our body is good at work when sleeping
B. young people can experience REM sleep
C. the speed of sleepers' pulses will slow down during the REM sleep
D. all scientists have the same opinion on REM sleep
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阅读理解
A lot of boys and girls in western countries are wearing the same clothes, and many boys have long hair, so it is difficult to tell whether they are boys or not.
One day an old man went for a walk in a park in Washington and when he was tired, he sat down on a chair by a swimming pool. A young person was standing on the other side of the pool.
“Oh!” the old man said to the person sitting next to him, “Do you see the person with the loose clothes and long hair? Is it a boy or a girl?”
“A girl,” said the person, “She is my daughter. ”
“Oh!” the old man said quickly, “Please forgive me. I don’t know that you are her mother. ”
“I’m not,” said the person, “I’m her father. ”
1.What did the old man see on the other side of the pool?
|
A.A girl. |
B.A boy. |
C.An old woman. |
D.A man. |
2. The old man thought the person sitting next to him was____.
|
A.a woman |
B.a man |
C.a girl |
D.a boy |
3. “Please forgive me. ” in the passage means“____”
|
A.I’m not sure. |
B.I’m surprised. |
|
C.I’m sorry. |
D.I’m not living here. |
4. Which is right according to the passage?
|
A.Most people in western countries wear the same clothes. |
|
B.The old man thought the person next to him was a man. |
|
C.It’s difficult to tell boys from girls because they wear the same clothes. |
|
D.Sometimes men also have long hairs as women in western countries. |
5. Which can be the best title for the passage?
|
A.Are they wearing the same clothes? |
|
B.Can you tell boys from girls? |
|
C.Are they boys or girls? |
|
D.What’s wrong with the boys? |