Dreams can happen in any of the four stages of sleep. The most memorable and clearest dreams happen in the last stage of sleep (also known as REM sleep). The sleep cycle repeats about four to five times every night. So you can see how a person has several different dreams in one night. Most people only remember dreams that happen closer to the morning when they are about to wake up. That you can’t remember those dreams does not mean they never happened.
The stages in the sleep cycle are organized by the changes in different brain activities.

Stage 1: You are entering into light sleep. In this stage, your eyes move rapidly. We call this NREM. The body gets relaxed and your body temperature lowers. Your heart rate lowers, too. The body is preparing to enter into deep sleep.
Stage 2: Also characterized by NREM. In this stage, the body temperature and heart rate drop again. You are completely asleep.
Stage 3: Still in the NREM stage, this is a deeper sleep still.
Stage 4: In this stage of sleep, your eyes move back or forward. We call it REM sleep. This stage happens at about 90-100 minutes after the beginning of sleep. Your blood pressure rises, heart rate speeds up. The majority of your dreams happen in this stage.
These stages repeat themselves throughout a night’s sleep.
小題1: Dreams can happen in ___________.
A. Stage 1 and 2           B. Stage 3 and 4            C. every stage
小題2:Which of the following sentences is TRUE according to the passage?
A. These stages will happen once or twice one night.
B. Most people only remember the dreams that happen when they are about to wake up.
C. If one can’t remember his dreams, he never dreams at all.
小題3:What will happen in Stage 2?
A. Eyes move rapidly.   B. People enter into light sleep.    C. Heart rate drops.
小題4:The first REM sleep happens about ___________ after the starting of sleep.
A. 1 to 2 hours                     B. 2 to 3 hours                     C. 10 minutes
小題5:The passage is mainly about ___________.
A. the stages of sleep     B. types of dreams         C. remembering dreams

小題1:C
小題2:B
小題3:C
小題4:A
小題5:A

小題1:本文第一句提到夢可能會發(fā)生在睡眠4個階段當(dāng)中的任何一個階段,故本題選C。
小題2:本文第四行提到絕大多數(shù)人都能記住快要醒時所做的夢,故B項(xiàng)是正確的,故本題選B。
小題3:睡眠的第一階段人進(jìn)入淺睡眠狀態(tài),眼睛跳動的快,睡眠的第二階段人完全睡著了,體溫和心率下降,故本題選C。
小題4:從圖表上可以看到人睡眠的第一階段大概發(fā)生在人睡覺后的1到2小時,故本題選A。
小題5:本文主要談?wù)摿巳怂X時的四個階段,故本題選A。
練習(xí)冊系列答案
相關(guān)習(xí)題

科目:初中英語 來源:不詳 題型:完形填空


I lost my sight when I was four years old by falling off a box and landing on my head. Now I am thirty-two. I can vaguely(模糊地)  1  the brightness of sunshine and what color red is. It would be wonderful to see things again,  2  a disaster can do strange things to people. It happened to me the other day that I might not have come to love  3  as I do if I hadn’t been blind. I believe in life now. I am not sure that I would believe in it so  4 . I don’t mean that I would prefer to go without my eyes. I  5  mean that the loss of  6  made me enjoy more of  7  I have now.
Life asks us to keep making  8  to reality. If a person is able to get ready for anything changeable his world will  9  more meaningful. I became blind, but I was  10 . My parents and my teachers saw  11  in me-a potential(潛力) to live, you might call it-which I didn’t see, and they make me fight it out with blindness.
The hardest  12  I had to learn was to believe in myself. That was what I had to do at least. If I hadn’t been able to do that, I would become a chair rocker for the  13  of my life. When I say I believe in myself I am not talking about simply the kind of self-confidence that helps me down an unfamiliar staircase  14 . That is part of it. But I mean something bigger than that: A belief that I could deal with anything alone; that somewhere in the  15  there is a special place where I can make myself fit.
1. A. imagine       B. find             C. remember     D. guess
2. A. but           B. though               C. so           D. because
3. A. myself       B. life             C. eyes         D. blindness
4. A. that         B. therefore            C. happily      D. deeply
5. A. seldom        B. just             C. hardly           D. always
6. A. them      B. it                   C. blindness        D. light
7. A. that         B. what             C. which            D. where
8. A. moments      B. encouragements       C. improvements D. changes
9. A. become        B. change               C. look         D. end
10. A. brave        B. lucky                C. sad          D. wise
11. A. something    B. everything           C. nothing      D. anything
12. A. problem      B. experience           C. difficulty       D. lesson
13. A. rest     B. whole                C. need         D. last
14. A. lonely       B. alone                C. self         D. person
15. A. company  B. group                C. society  (社會)   D. family

查看答案和解析>>

科目:初中英語 來源:不詳 題型:完形填空

One day an old man went into a cafeteria (自助餐廳) to eat in America for the first time. He sat down at an empty table and waited for   43  to take his order. Of course nobody did. Finally, a woman with a plate full of food sat down opposite him and told him how a cafeteria   44 .
“Start out at that end,” she said. “Just go along the line and   45  what you want. At the other end they’ll tell you how much you have to pay.”
“I soon learned that’s how everything works in the US,” the old man later told a friend. “ 46  is a cafeteria here. You can get anything you want   47  you are willing(自愿的) to pay the price. You can even get success, but you’ll never get it if you wait for someone to   48  it to you. You have to get up and get it yourself.”   
49 , life everywhere is like a cafeteria. Don’t wait for things to happen to you. Success lies in your own   50 .
小題1:
A.his friendB.his wifeC.a(chǎn) strangerD.someone
小題2:
A.workedB.paintedC.repairedD.planned
小題3:
A.send outB.give outC.pick outD.look out
小題4:
A.SchoolB.LifeC.OfficeD.Company
小題5:
A.ifB.becauseC.thoughD.until
小題6:
A.carryB.lendC.moveD.bring
小題7:
A.In peaceB.In the endC.In factD.In a hurry
小題8:
A.workB.handsC.opinionD.books

查看答案和解析>>

科目:初中英語 來源:不詳 題型:完形填空

Dear Dad,
Happy birthday to you !
On this special day I’d like to talk to you 16 a special way
I don’t think I am good at  17 you my thought face to face with you,so I’m writing to show my deep love for you.
You’re not a rich man or a famous person.But in my heart,you are one of the greatest  18 in the world.I am  19  you.
You are  20 interested in fame and wealth.You do  21 things like paying phone bills on time,and working as a worker in your factory.The smile on your face shows you are pleased with the family.You take good care of my grandparents.You help me with my schoolwork and do some shopping with Mom on Sundays.
In the past,I didn’t care  22 you were with me or not.Now I am sorry to say I  23 you the respect before.But I am thankful for what you have done for me. I am quite lucky that I have  24  a great father.And I feel happy that now I can let you  25 how much I love you.You are successful as a son,a husband,a father,and a friend.
Wish you happy forever!
Yours,David
小題1:
A.inB.a(chǎn)tC.byD.on
小題2:
A.talkingB.sayingC.speakingD.telling
小題3:
A.businessmenB.manC.menD.worker
小題4:
A.worried aboutB.proud ofC.a(chǎn)fraid ofD.sorry for
小題5:
A.a(chǎn)lwaysB.everC.a(chǎn)lreadyD.never
小題6:
A.ordinaryB.interestingC.wonderfulD.popular
小題7:
A.whetherB.thatC.whatD.where
小題8:
A.will showB.don’t showC.didn’t showD.have shown
小題9:
A.tooB.soC.veryD.such
小題10:
A.to knowB.knowC.knewD.knowing

查看答案和解析>>

科目:初中英語 來源:不詳 題型:閱讀理解

Have successful people ever felt sad? Do they have any “secrets” to success? The answers to these questions can be found in US president Barack Obama’s “back to school” speech. Here is an excerpt(摘錄) from his speech.
I know that sometimes, you get the sense that you can be rich and successful without any hard work—that your ticket to success is through rapping (饒舌音樂) or basketball or being a TV star, when chances are, you’re not going to be any of those things.
But the truth is, being successful is hard. You won’t love every subject you study. Not all the homework will seem completely important to your life right this minute. And you may not succeed at everything the first time you try.
That’s OK. Some of the most successful people in the world are the ones who’ve had the most failures. JK Rowling’s first Harry Potter book was turned down 12 times before it finally came out. Michael Jordan was cut from his high school basketball team, and he lost hundreds of games and missed thousands of shots (投籃) during his career. But he once said, “I have failed over and over and over again in my life. And that is why I succeed.”
These people succeeded because they understand that you can’t let your failures beat you—you have to let them teach you. You have to let them show you what to do differently next time.
No one’s born being good at things. You become good at things through hard work.
Don’t be afraid to ask questions. Don’t be afraid to ask for help when you need it. I do that every day. Asking for help isn’t a sign of weakness; it’s a sign of strength. It shows you have the courage to admit(承認(rèn)) when you don’t know something, and to learn something new.
And even when you’re struggling, even when you’re discouraged (泄氣), and you feel like other people have given up on you—don’t ever give up on yourself. Because when you give up on yourself, you give up on your country.
小題1:Why does Barack Obama mention (提到) JK Rowling and Michael Jordan in the fourth paragraph?
A.To compare these two famous persons.
B.To explain that writing and sports are difficult skills.
C.To show that the two persons were treated unfairly.
D.To prove that failure is the mother of success.
小題2:Which of the following statements is NOT true?
A.No one can be successful without working hard.
B.Failure can be good if you treat it in a right way.
C.Those who believe in themselves shouldn’t ask others for help.
D.One should try his best to make his dream come true.
小題3:Which of the following is the closest in meaning to the underlined sentence?
A.One should change his mind when others give honest advice to him.
B.One should believe in himself no matter what difficulty he is faced with.
C.One doesn’t have to work hard when he has failed several times.
D.One doesn’t have to take others’ advice when they get away from him.

查看答案和解析>>

科目:初中英語 來源:不詳 題型:閱讀理解

Because earthquakes happen without warning, it’s important to take steps now to prepare. Because you don’t know where you will be when an earthquake happens, prepare some supplies for your home, workplace, and car.
1. Water.
A person needs at least 1/2 gallon of water daily just for drinking. Store at least 1 gallon of water per person per day and be prepared for a 72-hour period. It is suggested that you buy bottled water. Keep bottled water in its original container and do not open it until you need to use it. Also, do check the “use by” date.
2. Food.
It’s always a practical idea to keep a supply of non-perishable(不易腐爛的) food on hand. Have an enough supply of canned food, powdered milk, dried fruits, non-salted nuts and canned juices for at least 72 hours.
3. Flashlights(手電筒) and spare batteries.
Keep a flashlight beside your bed, at your place of work, and in your car. Do not use matches or candles after an earthquake until you are sure that no gas leaks.
Prepare a battery-powered radio and spare batteries. Most telephones will be out of order, so radios will be your best source of information.
4. Clothes.
If you live in a cold place, you must think about warmth. You might not have heat after an earthquake. Think about your clothing and bedding supplies.
小題1: Why should people prepare themselves for an earthquake?
A.Because earthquakes can be known before they happen.
B.Because earthquakes take place without warning.
C.Because earthquakes usually take place in the neighborhood.
D.Because it’s people’s daily work to prepare the earthquakes.
小題2: About the prepared water, which description is RIGHT?
A.A person should prepare 0.5 gallon of water for one day.
B.You’d better use your own containers to keep water.
C.You’d better open the bottled water when you buy it.
D.You shouldn’t open the bottled water until you need it.
小題3: You should prepare all of the following except ______.
A.powdered milkB.fresh vegetables
C.dried fruitsD.canned juices
小題4:According to the article we know that ______.
A.we need to prepare some supplies only at home
B.a(chǎn) telephone is the most important prepared thing
C.flashlights but not matches are first used after earthquakes
D.clothes are used to protect your head
小題5: If you live in a cold place, you should prepare _______.
A.some warm clothes and bedding suppliesB.some hot water
C.some batteriesD.some flashlights

查看答案和解析>>

科目:初中英語 來源:不詳 題型:寫作題

書面表達(dá)(15分)
學(xué)會感恩,是我們每個人一生中的必修課。三年的初中生活就要過去了,你最想向誰表達(dá)你的感恩之情? 請以“Thanks, my__________________"為題寫一篇80詞左右的英語短文。
要求: 語言表達(dá)準(zhǔn)確,短文連貫通順;文中不得出現(xiàn)真實(shí)姓名和學(xué)校名稱;80詞左右。

查看答案和解析>>

科目:初中英語 來源:不詳 題型:寫作題

作文。(10分)
壓力(Stress),現(xiàn)在的人都會有壓力,你認(rèn)為有壓力是好事還是壞事,壓力應(yīng)該如何去排解,請根據(jù)以下要求寫一篇80詞左右的短文:
內(nèi)容要求:
談?wù)勀悻F(xiàn)在遇到的壓力(學(xué)業(yè)、功課、課外學(xué)習(xí)、友誼、父母期盼等)
壓力對對你產(chǎn)生的影響 (影響隨眠、心情焦慮、易發(fā)脾氣等)
怎樣應(yīng)付壓力 (找傾訴對象、運(yùn)動、吃東西、聽音樂等)

查看答案和解析>>

科目:初中英語 來源:不詳 題型:寫作題

(Ⅰ)今年3月,美國第一夫人米歇爾參觀北京師范大學(xué)第二附屬中學(xué),眾多網(wǎng)友卻因該校同學(xué)們所穿的校服而在網(wǎng)上再度引爆“校服之爭”。請根據(jù)下面內(nèi)容提示,完成一篇短文。
贊成方:1. 校服有利于學(xué)生參加各種活動,尤其是體育活動。
2. 校服便宜,能替家長省錢。
3. 學(xué)生們不用每天浪費(fèi)時間考慮應(yīng)該穿什么。
反對方:校服太丑了,顏色單一,偏大。
我的觀點(diǎn):贊成在校期間穿校服,但是應(yīng)該提高校服的質(zhì)量。
參考詞匯:網(wǎng)友e-pal;活動activity;校服school uniform;質(zhì)量quality
注意:1. 詞數(shù):80詞左右,短文的開頭和結(jié)尾已給出,不計入總詞數(shù)。
2. 覆蓋所有要點(diǎn);可適當(dāng)增加細(xì)節(jié),使行文連貫。
Ms Michelle Obama, the First Lady of the US, visited The Second High School Attached to Beijing Normal University on March, 2014. To our surprise, quite a lot of e-pals began to argue with each other about the school uniforms they were wearing……

查看答案和解析>>

同步練習(xí)冊答案