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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 each, sleepers’ eyes made rapid movements, as if they were watching something. He called these periods REM sleep, for Rapid Eye Movement. Periods when sleepers’ eyes did not move he called 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, REM 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 in 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 major car accidents happen during the early morning hours, when people are sleepiest.
During REM sleep, a person’s breathing and heartbeat ________.

A.stop B.increase C.decrease D.stay the same

Which word in paragraph(段落)3 means “colorful and lively”?

A.easier B.empty C.vivid D.quickly

Which paragraph tells what happens when people don’t get enough sleep?

A.1 B.2 C.3 D.4

What is the main idea of the article?

A.REM sleep helps the brain grow.
B.REM sleep has been watched and recorded by scientists.
C.REM sleep is a time to empty the day’s garbage.
D.REM sleep is an active time when the body is hard at work.

You can decide from the article that REM sleep ________.

A.has a restful effect on people
B.can be avoided with lots of sleep
C.is something that all people experience
D.is something that all scientists agree on
科目 英语   题型 阅读理解   难度 中等
知识点: 人生感悟类阅读
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相关试题

The children often play soccer in the garden(花园).Sometimes they break (打破)Mrs. Smith’s windows.
One afternoon , Mrs. Smith is reading a newspaper at home.After a short time, she closes her eyes and goes to sleepAt that time a little boy knocks(敲) at the door.Mrs. Smith opens the door and asks, “Do you break my windows again(又一次)?” “Oh, no”, says the boy.“ Your windows are open this time and our soccer is in your room.Can I get it back, please?”
根据短文内容,选择正确答案。
The underlined(划线) word “sleep” means _____in Chinese.

A.故事 B.睡觉 C.睡椅 D.思想

The children often break Mrs. Smith’s ____ when they play soccer.

A.doors B.gardens
C.newspapers D.windows

One afternoon, Mrs. Smith is _____ at home.

A.seeing a movie B.cleaning windows
C.watching TV D.reading a newspaper

The little boy _____ Mrs. Smith ‘s door.

A.knocks at B.opens
C.breaks D.closes

The children’s soccer is _____.

A.in the garden B.in the window
C.in Mrs. Smith’s room D.Mrs. Smith

There is a quiet and beautiful valley.Po is a lazy panda.He lives there.He is a waiter in a noodle restaurant.One day, a group of snow leopards(美洲豹)want to occupy the valley.ALL the animals decide to find a kung fu leader(领袖)To everyone’s surprise, Po becomes their leader。Po must learn kung fu to save the valley from powerful foes(仇敌).Po learns kung fu from his teacher every day.At last the snow leopards are defeated(打败)by Po.He saves the valley and all the other animals.Po knows that if he believes in himself, he can do anything well.
Kung Fu Panda is a computer-animated comedy.Many famous stars dub(配音)the characters.You must know Jackie Chan.He also dubs a character in this film.
—What does the panda do?
—He is a_________.

A.student B.teacher C.player D.waiter

Who teaches Po kung fu?

A.His father B.His teacher
C.His brother D.Himself

What’s the Chinese meaning of the underline word?

A.占领 B.保护 C.使用 D.修建

Why can Po save the valley and all the other animals?

A.Because he is very tall.
B.Because he is very big.
C.Because he believes in himself.
D.Because he likes fighting.

Who dubs a character in Kung Fu Panda?

A.Jet Li B.Jolin Tsai
C.Jackie Chan D.Zac Ffron

A Most people want to be happy, but few know how to find happiness.Money and success alone do not bring lasting happiness.Aristotle, a Greek thinker, said, “Happiness depends upon ourselves.”In other words, we make our own happiness.Here are a few suggestions to help you be happier.
The first secret of happiness is to enjoy the simple things in life.We spend so much time thinking about the future that we fail to enjoy the present.You should enjoy life’s pleasures, such as reading a good book, listening to your favorite music, or spending time with close friends.They live happier and healthier lives .
Another secret to living a happy life is to be active, you can dance, or play sports, such as swimming.You can forget about your problems, and only think about the activity.Finally, many people find happiness in helping others.People feel good when they spend their time helping others.If you want to feel happier, do good things for someone.You can help a friend with his or her studies, go shopping to buy food for an elderly person.
The best title of the passage is ________.

A.Money Makes You Happy
B.The Secrets of Happiness
C.Ideas for Helping Other People to Be Happy
D.Good Friends Make You Happy

The second paragraph tells us that ________.

A.the more friends you have, the happier you will be
B.we shouldn’t think about our future
C.happiness is to enjoy the simple things in life.
D.some people fail to live a happy life

The passage gives us ________ pieces of advice on happiness.

A.one B.two C.three D.four

The writer thinks that ________.

A.everyone knows how to live a happier life
B.it’s wrong to spend time on work
C.hobbies take up too much time
D.doing good things for someone can make you happier

Which of the following is NOT mentioned in the passage?

A.Reading a good book.
B.Traveling to a foreign country.
C.Playing a sport.
D.Spending time with close friends.

Here are some home-stay trips you can choose if you and your family want to go on a trip.

Place: Auckland, New Zealand Dates: July 9—24 Cost: $ 3,900 Temperature: 13℃--9℃ Foods: lamb, seafood
Popular sports: tennis, golf, horseback, riding Good buys: sweaters, coats, jewelry
Place: Portland, U.S.A Dates: Aug.12—Sept.13 Cost: $ 4, 100
Temperature: 26℃--13℃ Foods: seafood, pizza, hamburgers
Popular sports: rafting, fishing, horse riding, hiking
Good buys: hoots, jeans, sporting goods
Place: Vancouver, Canada Dates: Sept.2--25 Cost: $ 4,350
Temperature: 19℃--16℃ Foods: smoked salmon, lobster, ethnic foods
Popular sports: tennis, fishing, mountain hiking
Good buys: sweaters, leather products
Place: Perth, Australia Dates: Aug.11—Sept.1 Cost: $ 5,100
Temperature: 15℃--11℃ Foods: crabs, beef, prawns
Popular sports: rafting, golf, tennis
Good buys: aboriginal goods, leather products, opals

________ is the warmest place on August 27.

A.Auckland B.Perth C.Portland D.Vancouver

The highest trip price is in ________.

A.Auckland B.Perth
C.Portland D.Vancouver

Fishing is Mr.White’s hobby.So we can advise him to go to ___ for his holiday.

A.Perth or Auckland
B.Portland or Perth
C.Auckland or Vancouver
D.Portland or Vancouver

If you go on a trip in Perth, you can’t eat _________.

A.lamb B.prawns C.crabs D.beef

If you prefer to travel to Vancouver, your favourite sport may not be __________.

A.fishing B.mountain climbing
C.tennis D.horseback riding

Little Tom likes cartoons Very much.When the cartoons begin on TV, he just watches then until they’re over.Sometimes he'd rather(宁可)wait for a long time and go to bed late.In the morning, his mother has to wake him up, or he'll be late for school.
Yesterday Tom heard there would be an interesting cartoon.In the morning, as soon as he got up, he turned on the television, but didn't see the program on it.He had to have breakfast and then went to school.After school he ran home while his mother was cooking supper in the kitchen.He hurried to the sitting room and turned on the television again, but he couldn't find the cartoon.He rushed into the kitchen and asked his mother for help.
"It's only five now," said the woman." Your program will begin after supper."
"Well, let's have supper right now!"
Tom goes to bed late sometimes, so _________.

A.he's late for school.
B.he goes to school by bus
C.he can't wake up himself in the morning
D.he has to go to school without breakfast

It takes Tom much time to_________when he's free.

A.play football
B.watch football matches on TV
C.do his homework
D.watch cartoons on TV

_____, so he turned on the television after getting up this morning.

A.Tom thought he had some time left
B.Tom didn't know when the cartoon would begin
C.Tom wanted to know the important news
D.Tom hoped to watch a TV play

Tom was afraid_________, so he ran home.

A.to miss the interesting cartoon
B.to miss the last bus
C.he would be hungry
D.he had little time to finish his homework

Tom thought _________.

A.supper should be ready
B.his mother's watch was worn out
C.the cartoon would begin as soon as he finished supper
D.his mother cooked supper too late

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