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（脈搏）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.
1.During REM sleep, a person’s breathing and heartbeat ________.
A．stop B．increase C．decrease D．stay the same
2.Which word in paragraph（段落）3 means “colorful and lively”?
A．easier B．empty C．vivid D．quickly
3.Which paragraph tells what happens when people don’t get enough sleep?
A．1 B．2 C．3 D．4
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.
5.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
閱讀快車系列答案科目：初中英語 來源：2011～2012學年度江西省贛州市興國一中八年級上學期期中考試英語卷 題型：閱讀理解
Long, long ago there was a very foolish thief. Do you know what he did one day? When he wanted to steal (偷) the bell on his neighbor’s door, he walked up to the door, took hold of (抓住) the bell and pulled hard. The bell made a very loud noise. The thief was afraid and went home.
Then he sat down to think, “I must do something about the noise,” he said. He thought and thought. At last he had an idea. “Ah, I’ll put some cotton in my ears. Then I won’t be able to hear the noise.” The next day he went to the door of his neighbor, and took hold of the bell. This time he pulled even harder. The bell rang loudly, but the thief did not hear anything. With another hard pull he got the bell out. Just then the neighbor came running out. “Steal my bell? I’ll teach you a lesson (教訓),”the angry man shouted. And he hit the thief on the nose.
The foolish thief did not know how the neighbor found out he was stealing the bell. “Why did he come out just then?” he wondered (感到疑惑).
【小題1】The thief was trying to get .
| A．his neighbor | B．his neighbor’s doorbell |
| C．some cotton | D．a door with a bell on it |
| A．safe | B．difficult | C．dangerous | D．easy |
| A．he knew his doorbell was being stolen |
| B．he thought someone was eager (渴望的) to visit him |
| C．He realized (意識到) something strange happened |
| D．Both B and C |
| A．give him lessons | B．punish (懲罰) him for stealing |
| C．help him with the bell | D．be his teacher |
| A．The thief understood why he was hit on the nose. |
| B．The thief knew why the neighbor came out. |
| C．The thief thought the neighbor could not hear the bell. |
| D．The thief didn’t want to know why the neighbor ran out just at the time he stole the doorbell. |
查看答案和解析>>
科目：初中英語 來源：2011-2012學年甘肅省武威市第五中學初二3月月考英語試卷 題型：句型轉換
句型轉換
【小題1】I will write him a letter .（改為同義句）
I will write ------ --------- --------- ----------.
【小題2】You should get a part-time job. (就劃線部分提問)
---------- ---------- you do?
【小題3】Jim spent twenty Yuan on his new backpack. （改為同義句）
Jim -------- twenty Yuan ---------- his new backpack.
【小題4】There will be more buses in the future .（改為一般疑問句）
----------- ---------- be more buses in the future?
【小題5】Do you know? Where does he come from? （合并為一句）
Do you know ------ he ------- -------?
【小題6】Lucy gets on well with her English. .(就劃線部分提問)
--------- -------- Lucy get ------- with her English?
查看答案和解析>>
科目：初中英語 來源：2012屆山東省濟南市槐蔭區初三中考三模英語試卷（帶解析） 題型：句型轉換
按括號中的要求完成句子，每個空格填一個單詞。
【小題1】They get up early in the morning. (改為一般疑問句)
_____________ they _____________ up early in the morning?
【小題2】I like action movies and comedies. (就句子劃線部分提問)
_____________ _____________ of movies do you like?
【小題3】Kate asked me, “Do you know Sandy’s address?” (改寫句子，句意不變)
Kate asked me _____________ I _____________ Sandy’s address.
【小題4】I can’t buy that watch because I have run out of money. (改寫句子，句意不變)
I can’t buy that watch because I have _____________ _____________ all my money.
【小題5】They don’t allow students to use mobile phones at school. (改寫句子，句意不變)
Students _____________ _____________ to use mobile phones at school.
查看答案和解析>>
科目：初中英語 來源：2013-2014學年浙江省九年級第一學期第二次月考英語試卷（解析版） 題型：單項填空
—Do you know ________, Jerry? —Sure.For a week.
A. when will Mr. Zhang come back
B. where will Mr. Zhang go
C. how long Mr. Zhang will be in the UK
D. how soon Mr. Zhang will come back
查看答案和解析>>
科目：初中英語 來源：2015屆江西吉安朝宗實驗學校七年級下期期中考試英語卷（解析版） 題型：補充句子
請閱讀下列短文。根據短文內容從下面方框的七個選項中，選擇五個適當的句子還原到原文中，使短文意思通順、結構完整。（每小題2分）
Do you know Lisa King? 1. _____________ She is from Australia. Her family are all in China now.
2.____________ Her mother is an English teacher in that school, too. Her brother, David, is student in our school, he is learning Chinese.3._______________ His parents are studying Chinese history. They like China very much.
4.___________ In this photo, Mr. King is sitting on the sofa. He is reading a Chinese book. Mrs King is watching TV. David is watering the flowers. Where's Lisa? She is in the kitchen.5._____________
A. Her father teaches English in No. 2 Middle School.
B. This is a photo of her family.
C. She is cooking.
D. He often teaches us English and we usually teach him Chinese.
E. She is my cousin.
F. Her mother is a teacher.
G. She is my good friend.
查看答案和解析>>
湖北省互聯網違法和不良信息舉報平臺 | 網上有害信息舉報專區 | 電信詐騙舉報專區 | 涉歷史虛無主義有害信息舉報專區 | 涉企侵權舉報專區
違法和不良信息舉報電話：027-86699610 舉報郵箱：58377363@163.com
