Everything that humans hear is in the form of waves (波).Just as the eye sees light wares in the form of colors, the ear and the eye Curs these different waves into signals that the brain (大腦) can make sense of.
The ears and brain have an Amazing amities to recognize（識(shí)別）particular sounds. For example, a mother often can tell when her baby is crying even if there are other crying babies in the same room. This is because the sound of her baby’s cry has special meaning to her and the brain has recorded is importance.
The ability to recognize sounds improves with experiences. As the brain receives information about sounds from day to day, it stores the information in its memory. When the brain hears new sounds, it gives meaning to them based on the information already in the memory. This is why certain words or songs can make a person happy. Often it is not the words or songs themselves that cause this feeling. The sounds are connected to happy memories for that person.
After hearing process controlled by the brain is to decide where a sound is coming from. One ear is usually closer to the source (來(lái)源) of a sound than the other ear is. Sound waves are stronger when they reach the ear that is closer. They also reach the closer ear first. The brain recognizes these differences and uses them to decide the location of the source of the sound.
小題1:Which of the following shows the normal hearing process of a mother hearing her baby crying?
a. The ears receive the sound waves.
b. The mother recognizes her baby’s cry.
c. The ears turn the sound waves into signals.
d. The baby’s cry ravels in the form of sound waves
e. The brain connects the signals to the information in me memory.
A．d-a-c-b-eB．d-a-c-e-bC．a(chǎn)-d-c-b-eD．a(chǎn)-d-c-e-b
小題2: Certain words or songs can change tarpon’s moods mainly because of his         .
A．lifestyle B．personalityC．experiences D．hobbies
小題3:According to the last paragraph, It will be the most difficult for a person who has lost the hearing in one ear to tell         .
A．where the source of a sound isB．how loud a sound is
C．when a sound starts to appearD．what makes a sound
小題4:What is the best title for this passage?
A．Human Brain’s Amazing Facts
B．Human Hearing Characteristics
C．How to improve Hearing
D．How Do Humans Hear

小題1:B
小題2:C
小題3:A
小題4:D
短文大意:這篇短文中作者以母親聽(tīng)到嬰兒的哭聲為例,介紹了人們是如何聽(tīng)到聲音的科學(xué)原理,并講述了耳朵辨別方位的科學(xué)道理.
小題1:根據(jù)短文一三段描述,可知母親只聽(tīng)到嬰兒的哭聲,首先要滿足聲音以聲波的形式傳播,然后耳朵接收到這種聲波,然后耳朵把這些聲波轉(zhuǎn)換成信號(hào),大腦把這些信號(hào)同記憶中的信息聯(lián)系起來(lái),最后母親辨別出嬰兒的哭聲.故選B..
小題2:根據(jù)第三段This is why certain words or songs can make a person happy. Often it is not the words or songs themselves that cause this feeling. The sounds are connected to happy memories for that person.描述,可知與人們的經(jīng)驗(yàn)有關(guān).故選C.
小題3:根據(jù)最后一段描述,可知兩只耳朵通過(guò)距離聲源的遠(yuǎn)近來(lái)辨別聲音發(fā)出的方向,所以當(dāng)一只耳朵失去聽(tīng)力之后,他無(wú)法辨別聲音發(fā)出的方向.故選A.
小題4:這篇短文中作者主要分析了耳朵是如何聽(tīng)到聲音的科學(xué)道理.故選D.
練習(xí)冊(cè)系列答案
相關(guān)習(xí)題

科目：初中英語(yǔ) 來(lái)源：不詳 題型：閱讀理解

This is not a diet. It’s a simple way to lose *weight. And you don’t even have to give up the food you love or join a gym. You just follow some habits that thin people have. Keep them, and you’ll become thin.
(1) Wake up
When you wake up in the morning, sit up slowly without using your hands. With legs straight out, *bend forward until you feel sore in your back. It will burn about 10 *calories.
(2) Start with soup
When you have a meal, order a clear soup, and have it before having the main food. In this way, you’ll eat less when the main food comes.
(3) An apple (or more) a day
Apples are full of *fiber and water, so your stomach will want less. The study shows that people who eat at least three apples a day lose weight.
(4) Stand up and walk around
Every time you use the mobile phone, stand up and walk around. Heavy people sit on a *average two and a half hours more each day than thin people. This skill is very important as standing up and walking around will burn fifty or more calories.
Use these skills, and you will have a big weight loss.
小題1:What should we have first if we want to eat less main food?
A．Soup.B．Ice cream.C．Salad.D．Cheese.
小題2:Why does eating apples make one’s stomach want less food?
A．Because apples are delicious.
B．Because apples are full of fiber and water.
C．Because apples are sour.
D．Because only apples are filled with calories58.
小題3:Stand up and walk around when you use the mobile phone because it will burn ___________ or more calories.
A．30B．40C．50D．60
小題4:Which of the following may the author disagree?
A．Sitting up slowly without using your hands helps burn calories.
B．Eating apples every day is good for people’s health.
C．You have to join a gym if you want to lose weight.
D．It’s good to walk around while talking on the mobile phones.

查看答案和解析>>

科目：初中英語(yǔ) 來(lái)源：不詳 題型：完形填空

In the modern world , advertising is everywhere ! Some people think  ___    __  ads are great . Others hate ads , saying that they make our cities and countryside look ugly. Many ads are aimed __    __ at teenagers , and some young people see more than 100 advertisements a day . It is true that some ads can be very  __    __ . For instance , they can help you compare two different products so that you can buy the one you really need . They can also help you ___    ____ money. When prices are listed , you can go to the store with the lowest__    __. Ads also tell you when stores are having sales . However , some advertising can be confusing or misleading . Sometimes the words sound good but don't really tell you anything about the quality of the product . At other times , the picture in an ad__    __ a lot better than the real thing . So you have to be careful . At times , an ad can lead you to buy something you don't need at all .
小題1:A. that                   B. what       C. which
小題2:A. Impossibly.    B. impolitely.    C. specifically.
小題3:A. awful          B. useful         C. careful.
小題4:A. save          B.waste.          C.lend.
小題5:A. pictures.       B. stores.       C. prices.
小題6:A.sounds .         B. looks.         C. feels.

查看答案和解析>>

科目：初中英語(yǔ) 來(lái)源：不詳 題型：完形填空

It’s very important that we all recycle (再利用). In nature, everything ___26___ again. For example, when an animal dies, it becomes ___27____ animal’s food. Nothing is wasted. But humans have created things like plastic bags ___28___ can’t be broken down by nature. Our rubbish kills animals and __29___ water and soil. ___30___ we continue making too much rubbish, the problem will only get worse. If nature can’t reuse the rubbish, we must recycle __31__.
We should clean up the rubbish we’ve made because nature can’t.
Recycling is also the right thing to do for another reason. The earth is rich in natural materials like water and trees, __32 __ these materials are not endless. We use up our natural materials much _ _33 __ than the earth is able to reproduce them. For example, each year we cut __34 __ more that 6,000 square miles of forest. But it takes an average of 25 years for a new tree __35__.
Recycling can help us save the earth, so let’s take action right now.
小題1:
A．useB．usingC．is usedD．used
小題2:
A．a(chǎn)notherB．otherC．othersD．the other
小題3:
A．whoB．whichC．howD．where
小題4:
A．pollutesB．pollutedC．pollutingD．is polluted
小題5:
A．WhenB．WhetherC．WhyD．If
小題6:
A．themB．theirC．itD．itself
小題7:
A．butB．soC．a(chǎn)ndD．or
小題8:
A．fastlyB．fastC．tasterD．fastest
小題9:
A．outB．downC．inD．up
小題10:
A．growsB．for growingC．growingD．to grow

查看答案和解析>>

科目：初中英語(yǔ) 來(lái)源：不詳 題型：閱讀理解

A group of swans flew down to a beach where a crow(烏鴉) was jumping around. The crow watched them with disdain(鄙視).
“You have no flying skills at all!” he said to the swans. “All you can do is to move your wings. Can you turn over in the air? No, that’s beyond you. Let’s have a flying competition. I’ll show you what real flying is!”
One of the swans, a strong young male, took up the challenge. The crow flew up and began to show his skills. He flew in circles, performed other flying tricks, and then came down and looked proudly at the swan.
Now it was the swan’s turn. He flew up, and began flying over the sea. The crow flew after him, making all kinds of comments(評(píng)價(jià)) about his flying. They flew on and on till they couldn’t see the land and there was nothing but water on all sides. The crow was making fewer and fewer comments. He was now so exhausted that he found it hard to stay in the air, and had to struggle to keep himself from falling into the water.
The swan pretended(假裝) not to notice, and said, “Why do you keep touching the water, brother? Is that another trick?”
“No,” said the crow. He knew he had lost the competition. “I’m in trouble because of my pride! If you don’t help me, I’ll lose my life…”
The swan took pity on him, and took him on his shoulders and flew back to the beach.
小題1:What’s the correct order of the following events?
a. The crow showed off its flying skills.
b. The swan felt pity for the crow and saved it.
c. The crow laughed at the swan’s flying.
d. The crow followed the swan and got into trouble.
e. The crow challenged the swans and a strong young swan accepted it.
A．e, c, d, a, b B．a(chǎn), e, c, d, b C．c, e, a, d, b D．e, a, d, c, b
小題2:What does the underlined word “exhausted” in Paragraph 4 mean?
A．Tired. B．Angry. C．Frightened.D．Regretful.
小題3:Why did the crow keep touching the water?
A．It was showing another flying skill.
B．It was struggling to keep itself from falling into the water.
C．It was thirsty and wanted to drink some water.
D．It was enjoying itself by doing so.
小題4:What can we infer(推斷) from the passage?
A．The crow didn’t know flying.
B．Flying skills were useless.
C．The swan saved the crow because they were good friends.
D．The swan was better at long-distance flying than the crow.
小題5:What does the story tell us?
A．No pains, no gains.B．The early bird catches the worm.
C．Pride goes before a fall.D．Practice makes perfect.

查看答案和解析>>

科目：初中英語(yǔ) 來(lái)源：不詳 題型：閱讀理解

Good morning. The program today is about music. The word “music” comes from the Greek word “muse”. The Muses are the goddesses of the arts. The Music is only one of the arts. It is like the spoken language, but it uses sounds. Today’s program brings together music from different concerts of the world. Who invented music? Who sang the first song? No one knows exactly the answers to these questions. But we know that music plays an important part in almost everyone’s life. Babies and young children love to hear people singing to them. When they are a little older, they like to sing the songs they have heard. When children go to school, their world of music grows. In the middle grades, students take music lessons. When they reach high school, they become interested in listening to pop music. 
The records we have chosen for you today are from American country music, Indian music, pop music and so on. Music has meaning for everyone. It can make people happy or it can make them sad. In this program we shall study the language of music. We shall be trying to find out more about how music works. We shall try to find out how music says what people feel.
Now, here comes the music today , I shall explain why they are all good music.
小題1:The first paragraph is mainly about the             .
A．styles of musicB．history of musicC．taste of musicD．knowledge of music
小題2:Which is NOT the purpose of this music program?
A．To study the language of music .B．To learn more about the music.
C．To give a complete background to the music.D．To give people some music to listen to.
小題3:The speaker is probably        . 
A．a(chǎn) hostB．a(chǎn) singerC．a(chǎn) dancerD．a(chǎn) teacher

查看答案和解析>>

科目：初中英語(yǔ) 來(lái)源：不詳 題型：完形填空

The elephant is the biggest four-legged animal in the world. It’s also, perhaps, the gentlest ,   1 not always.
Elephants are like us in some ways. They   2  for a long time—fifty or sixty years. They can  3  things very well. They never forget great sadness or happiness. A female elephant   4 , her daughters and her granddaughters are sad for many months. They stay with the dead   5 . Then they carry a bit of it away with them. They never forget a  6 friend.
Elephants are like us, but they’re also  7 .They live in families; families or females. There will be a few young males-a few “baby boy”. But they will soon be   8 away by their mothers or sisters. An elephant family   9  only its daughters, mothers and grandmothers and its great grandmothers.
The females stay together for fifty, sixty or a hundred years.The older animals   10 the young ones. The mothers teach their daughters and set a good example.And   11  happens to male elephant? Well, the young males stay with their mothers for a time. Then they must   12 the family. The females just send them away. A bull elephant does not often have a friend ,He lives  13 ,away from the family, and away from other bulls.
Sometimes the females call a bull. He can   14 _them then, and they stay for a time. But soon his “wives” and “sisters” send him away again. The females have a very   15   
family life. What do the bulls think about it? We don’t know.
小題1:
A．a(chǎn)ndB．butC．soD．yet
小題2:
A．playB．workC．liveD．sleep
小題3:
A．rememberB．practiceC．talk D．change
小題4:
A．is hurtB．is caughtC．losesD．dies
小題5:
A．headB．legsC．bodyD．feet
小題6:
A．terribleB．dadC．youngD．dear
小題7:
A．differentB．sameC．specialD．popular
小題8:
A．thrownB．sentC．kickedD．posted
小題9:
A．hopesB．keepsC．AllowsD．frightens
小題10:
A．look atB．carry outC．look afterD．take away
小題11:
A．howB．whoC．whichD．what
小題12:
A．leaveB．stayC．hearD．walk
小題13:
A．sadlyB．hardC．a(chǎn)loneD．noisily
小題14:
A．visitB．beatC．hideD．receive
小題15:
A．dangerousB．happyC．beautifulD．clever

查看答案和解析>>

科目：初中英語(yǔ) 來(lái)源：不詳 題型：閱讀理解

Listening test is one of the important parts of the English exam. Here are some tips for you .
Before you start to listen ,you need to relax. Don't be nervous. And try to read the questions .These questions usually help you understand the dialogue or the passage.
Then listen carefully to the first sentence. It usually tells you the main idea of the passage. When you 're listening ,try to do some thinking and take some notes ,suck as:
? What happened?
? When ,where, and how?
? What does the speaker want to tell us?
In this way, you may understand the passage better.
Please rememeber not to think about one or two words for a long time. When you hear some words you don't know, don't spend too much time on them. Very often, you'll find out what they mean later when you go on with the listening.
小題1:This passage mainly talks about          .
A. tips on listening    B. tips on speaking      C. tips on reading
小題2:It's better for you to keep           when you start to have a listening test.
A. excited           B relaxed            C. nervous
小題3:We should listen to the first sentence carefully, because it usually tells us        
A. the answer to the question
B. where to write the answers  
C. the main idea of the passage
小題4:When you're listening, it's important for you to          .
A. remember every word        
B. take some notes 
C. Think about one word for a long time
小題5:The           usually help(s) us understand the passage better.
A. questions            B. first sentence         C. notes

查看答案和解析>>

科目：初中英語(yǔ) 來(lái)源：不詳 題型：閱讀理解

Here is the content ( 目錄 ) of a book．
Unit
Readings
Skills
Words
Unit1 Music
*Music & Feelings
*Sad movies
*Understanding main ideas
*Predicting by title
*Kinds of Music
*Music stars
Unit2 Sports
*National Sports
*The ancient Olympic Games
*Understanding main ideas
*Guessing meaning of new words
*Action verbs
*Names of sports
Sports tools
Unit3 Weather
*Weather service
*Weather and nature
*Understanding main ideas
*Guessing meaning of new words
*Weather conditions
*Weather information
Unit4 Culture
*Travelling in India
*Body language in the United States
*Understanding main ideas
*Predicting by title
*Making inferences
*Cultural studies
*Culture and art
Unit5 Space
*Living in space
*The planets
*Understanding main ideas
*Understanding attitude
*Space news
*Space terms
小題1:If you’re interested in music, you can read “____”．
A．National sportsB．Sad moviesC．The planetsD．Weather service
小題2:You can learn something about weather in _____．
A．Unit 1B．Unit2 C．Unit 3D．Unit 4
小題3:In all the units, you can learn the skill of _____．
A．predicting by titleB．understanding attitude
C．understanding main ideasD．guessing meaning of new words

查看答案和解析>>

同步練習(xí)冊(cè)答案