Think about the last time you dropped a stone into water. Do you remember how the waves started? They began where the stone met the water and then moved outward.
Just as waves in water take time to move,so sound takes time to move in air. Sound takes time to travel.
Perhaps you have noticed the time that passes between a flash of lightning and the thunder. You may have heard the sound of a baseball bat hitting a ball an instant after you saw it happen.
Both light and sound take time to travel. However,there is a great deal of difference in their speed. In one second,sound can travel about1,000 feet through air. During this same time,light can travel more than186,000 miles!
When something makes a sound some distance away,you can often see the action before you hear the sound. As sound travels,vibrations are passed on from one molecule to another. The farther the sound has to travel,the longer it takes.
( ) 1. Which of these is WRONG?
A. " Sound and wave" means"水花和水波".
B. "Lightning and thunder" means"閃電和雷聲".
C. "Instant and second" means"瞬息和秒鐘”.
D. " Action and vibration" means"動作和振動".
( ) 2. Sound takes time to move in air just as .
A. waves B. trains C. buses D. cars
( ) 3. When we drop a stone into water,we can see .
A. nothing
B. the waves start where the stone meets the water and then move outward
C. the waves start far from the stone
D. both A and C
( ) 4. Which of these is RIGHT?
A. You may hear the sound of a baseball bat hitting a ball,then see the action.
B. You may hear the thunder before you see a flash of lightning.
C. Light takes no time to travel.
D. The farther the light has to travel,the longer it takes.
( ) 5. Which of these is NOT right?
A. In one second,sound can travel about340 meters through air.
B. In one second,light can travel about300,000,000 meters.
C. One foot is longer than one meter.
D. One meter is shorter than one mile.
科目:初中英語 來源: 題型:
One day,Mr. Black went into a restaurant. He put his c 1 on a chair near the door. There was nothing in the p 2 of his coat. After he had his meal,he went to take his coat back. He f 3 there was much money in one of his pockets. "Whose is this?" he thought. He saw a w 4 near the door,so Mr. Black said to him, "Somebody put a lot of money in my coat. I have no time to w 5 for him. I have to go. Take it,please. When he comes back,give it to him."The waiter t 6 it and went away. At the moment,a 7 man came with a coat just like Mr. Black's . "I'm sorry,”said the man. "I took your coat and you got m 8 . Please give me my coat and the money . ”Mr. Black answered ,"I gave the money to the waiter. He'll give it to you . " Mr. Black c 9 the manager (經(jīng)理) ,but the manager said ,"We have no waiters here. We only have waitresses. He m 10 be a thief!"
1. c 2. g 3. f 4. w 5. w
6,t 7. a 8. m 9. c 10. m
查看答案和解析>>
科目:初中英語 來源: 題型:
Do you need friends? Fm sure your answer is " Yes,of course. Everybody d 1 !” You need friends when you play and when you work. If you have friends,you will feel h 2 . If you have no friends,you will feel 1 3 Do you know how to m 4 friends? There is only one good way―you make friends by being f 5 .
A friendly person is interested in other people. He is always h 6 . If you want to make f 7 with a new classmate,you can t 8 with him,tell him about the o 9 classmates in your class and try your b 10 to be helpful to him.
1. d 2. h 3. 1 4. m 5. f
6. h 7. f 8. t 9. o 10. b
查看答案和解析>>
科目:初中英語 來源: 題型:
Now satellites are helping to forecast (預測) the weather. They are in space,and they can reach any part of the world. The satellites take pictures of the atmosphere (大氣) ,because this is where the weather forms (形成) .They send these pictures to the weather stations. So meteorologists (氣象學家) can see the weather of any part of the world. From the pictures,the scientists can often say how the weather will change.
Today,nearly five hundred weather stations in sixty countries receive satellite pictures. When they receive new pictures,the meteorologists compare (t匕較) them with earlier ones. Perhaps they may find that the clouds have changed during the last few hours. This may mean that the weather on the ground may soon change,too. In their next weather forecast,the meteorologists can say this.So the weather satellites are a great help to the meteorologists. Before satellites were invented,the scientists could forecast the weather for about 24 or 48 hours. Now they can make good forecasts for three or five days. Soon,perhaps,they may be able to forecast the weather for a week or more ahead (提前) .
( ) 11. Satellites travel .
A. in space B. in the atmosphere
C. above the ground D. above space
( ) 12. Why do we use the weather satellites to take pictures of the atmosphere? Because
A. the weather satellites can do it easily
B. clouds form there
C. the weather forms there
D. the pictures can forecast the weather
( ) 13. Meteorologists forecast the weather .
A. when they have received satellite pictures
B. after they have compared new satellite pictures with earlier ones
C. before they received satellite pictures
D. during they study satellite pictures
( ) 14. Maybe we'll soon be able to forecast the weather for .
A. one day B. two days
C. five days D. seven days or even longer
( ) 15. The main (主要的) idea of this passage is that satellites are now used in .
A. taking pictures of the atmosphere
B. receiving pictures of the atmosphere
C. doing other work in many ways
D. weather forecasting
查看答案和解析>>
科目:初中英語 來源: 題型:
Knowing about yourself means not only that you find what you are good at and what you like,it also means discovering what you are not good at and what you don't like. Both help you to see your aim in life.
Although most students would be unhappy if they found that they had failed an advanced math course,they have actually learned a great deal about themselves. They know they should not become engineers or physical scientist,and that they should not be good at accounting work. So failing can help a student to lead a much happier life he or she draws the right conclusion from the failing. They may then decide on their aim and choose the kind of work they would like to do.
It is impossible to decide whether or not you like something until you have tried it. If you decide that you would like to play the violin,you need to take more than one lesson before you can know whether you have any interest or ability.
It's not enough to want to be a violinist. You also have to like the hard and long training before you become one. If you would enjoy being a great violinist but hate the work,forget it.
It's a good plan to try as many ideas as possible when you are still young. And then you will come to a wise decision.
( ) 11. If you say you really know yourself, .
A. you know what you are good at
B. you have got the whole picture of yourself
C. you keep in mind your aim in life
D. you have less you don't like than what you like
( ) 12. The writer suggests .
A. failure is a better mirror
B. advanced math courses help you to know yourselves
C. success is more helpful
D. when one is unhappy he gets to know himself better
( ) 13. Failing can turn into something good .
A. if you have aim in life and get the job you wish to have
B. if you lead a happier life
C. if your decision is right
D. if you learn something from it
( ) 14. The example of "playing the violin" in paragraph 3 and 4 implies that .
A. if you don't like music,don't practise the violin
B. it takes more than one lesson to learn to play the violin
C. you can decide only after you have tried
D. you can become a great violinist only after hard and long training
( ) 15. Which of the following is NOT true according to the passage?
A. You have enough time before you come to a wise decision.
B. The more experiences,the better decision you will have.
C. It is a good plan to try as many ideas as possible when you are still young.
D. People always make hasty (匆匆的,輕率的) decisions.
查看答案和解析>>
科目:初中英語 來源: 題型:
Thomas Edison lost the first job. For the next five years he went around the country from job to job. At last Edison went to New York. He had little money. He could not buy enough food to eat. He had no place to sleep.
For many days Edison looked for work. He was hungry. At last he found work fixing machines. He could fix the old machines. He also made new ones. The head man liked Edison's new machines. He was going to give Edison$40,000 for them. Edison would now have money to do what he wanted.
Thomas Edison was then 23. He used the money to build a shop in New Jersey. He had many people working for him. But he worked more than any of them. He rested very little. Soon he was making more than 40 new things at one time.
In 1876 Alexander Graham Bell made a telephone. But it could carry voices only a little way. Edison wanted to make a better telephone. He soon made one. It could carry voices a long way.
( ) 6. After he lost his first job,Edison .
A. found no jobs in the next five years
B. lived in New York for the next five years
C. had a bad time in the next five years
D. had no food and no sleep during the next five years
( ) 7. In New York .
A. Edison was always hungry
B. Edison began to have good luck after he found the work fixing machines
C. Edison got$40,000 by fixing machines
D. Edison made more money by fixing old machines
( ) 8. The head man was interested in .
A. Thomas Edison himself B. The old machines
C. the new machines D. Edison's telephone
( ) 9. Edison made a telephone. It .
A. was the first one in the world
B. carried voices much farther
C. carried voices more clearly
D. carried more voices
( ) 10. What is the best title of the passage?
A. The First Telephone.
B. Thomas Edison's Shop.
C. Thomas Edison's New Job.
D. Thomas Edison一An Inventor (發(fā)明家) .
查看答案和解析>>
科目:初中英語 來源: 題型:
Read the directions of the medicine before you make your choices.
Adults: 2 tablespoonfuls Children: according to age 10 ~ 14 years 4 teaspoonfuls 6〜10 years 2 teaspoonfuls 3 ~6 years 1 teaspoonfuls Repeat above dose (—次劑量) every 1/2 hour to 1 hour if needed until 8 doses are taken. If you do not get better within two days,see a doctor.
SHAKE WELL BEFORE USING
( ) 1. According to the directions,what should you do before taking this medicine?
A. Heat it on the fire,
B. Add some hot water to it.
C. Move the bottle quickly up and down.
D. Go and ask the doctor's advice.
( ) 2. For whom would a dose of two teaspoonfuls be suggested?
A. A grownup. B. A 10-to-14-year-old child.
C. A 3-to-6-year-old child. D. A 6-to-10-year-old child.
( ) 3. What is the largest amount of medicine that should be taken by an adult in a fourhour period?
A. Two doses. B. Six doses.
C. Four doses. D. Eight doses.
( ) 4. According to the directions,how are children's doses decided?
A. By the age of the child.
B. By the weight of the child.
C. By the time of day.
D. By seeing a doctor.
( ) 5. What should you do if the medicine doesn't work?
A. Change it for some better medicine.
B. See a doctor.
C. Stop taking it.
D. Taking more.
查看答案和解析>>
科目:初中英語 來源: 題型:
The young mother set her foot on the path of life. "Is this a long way?" she asked. The God said, "Yes,and the way is hard. You will be old before you reach the end of it. But the end will be better than the beginning."
But the young mother was happy,and she would not believe that anything could be better than these years. So she played with her children,and gathered flowers for them along the way,and bathed them in the small rivers,and the sun shone on them,and the young mother cried, "Nothing will ever be lovelier than this."
Then the night came,and the storm,and the path was dark,the children shook with fear and cold,and the mother drew them close and covered them with her coat.
The morning came,and there was a hill ahead,and the children climbed and grew tired,and the mother was tired,too. But at all times she said to the children, "A little patience and we are there."When they reached the top they said, "Mother,we would not have done it without you."
The mother said to herself, "My children have learnt courage in the face of hardness. Yesterday I gave them courage. Today,I've given them strength."
The days went on,and the weeks and the months and the years,and the mother grew old. But her children were tall and strong,and walked with courage. At last they came to a hill,and beyond they could see a shining road and a golden gate. The mother said, "I have reached the end of my journey. And now I know the end is better than the beginning,for my children can walk alone."
Mother is the place you came from,your first home. She's your first love,your first friend,even your first enemy,but nothing on earth can separate you. Not time,not space ― not even death!
( ) 11. The young mother drew her children close and covered them with her coat to .
A. protect them from fear and cold
B. prevent them from storm and darkness
C. gather them together
D. give them warmth
( ) 12. Why did the mother say "A little patience and we are there" at all times?
A. To tell her children to climb the hill slowly.
B. To give her children courage in front of difficulty.
C. To let her children learn the patience.
D. To offer her children her patience.
( ) 13. When the young mother grew old,her children were .
A. brave and patient with strength
B. tall and strong without patience
C. patient and strong with bravery
D. tall and strong with courage
( ) 14. From the passage,we can learn that .
A. mother's love is unselfish
B. children grow faster with mother's love
C. mother can never be separated from us
D. mother always appears when we have difficulties
( ) 15. What does the underlined sentence "I have reached the end of my journey" mean?
A. I don't want to continue the journey.
B. I have arrived at my destination (目的地) .
C. Fm old and will get to the end of my life.
D. I can't go with you and you are old enough to take care of you.
查看答案和解析>>
科目:初中英語 來源: 題型:
Michael Jackson has been on the road of performing since he was five years old. For anyone who wants to know,the road to fame and fortune is long and hard to travel.
Michael remembers clearly those early years when he was young. His parents were both workers. But they were both musicians. Mr Jackson realized that his sons had a lot of talent,and he knew he could train them to become fine musicians. In those days there were plenty of music groups,and some of them were very good. He knew if his sons were to stand out,they would have to be the best.
Practice makes perfect. And the Jackson boys practiced!Gradually the group took shape. When the Jacksons took their first professional job,their total pay was only five dollars!But they kept on. They played at parties. They entered bigger and bigger contests. They worked at clubs. Then word of this group began to get around. All of a sudden,the Jackson Five became popular in the country and their first album sold a million copies!And Michael,11 years old then,was the star. It just didn't seem possible that so much talent could come from such a young performer.
Then Michael got a chance to do some solo (獨唱) songs. For the following years,Michael has always been on the top. When Michael was eighteen,he entered another field of his career (生涯) 一acting. "I plan to star in movies," he told his friends, "but of course,my first love is music."
Michael wrote a lot of his own songs.
Still,with all his success,Michael manages to keep his head calm. "I just do a different job from other people," he said, "but it doesn't make me think Fm better than other people."
To be quite honest,his fans just love to hear and watch him.
( ) 11. Michael Jackson began to perform with一 .
A. his father B. his mother
C. his parents D. his brothers
( ) 12. According to the passage,the underlined phrase "stand out" means .
A. stand up in the stage
B. go out of their hometown
C. be famous
D. be welcome
( ) 13. Which of the following is not mentioned in the passage?
A. The group began to go round the world.
B. The songs sung by this group were very popular.
C. The Jacksons shocked the country.
D. People could hardly believe that young Michael was so talented.
( ) 14. Michael Jackson wants to be .
E. a solo singer and musician rather than a film star and actor
F. not only a film star and an actor but also a solo singer and musician
G. a solo singer as well as a musician
H. a film star as well as an actor
( ) 15. The best title of the passage should be .
A. Famous the Jackson Five
B. Success Ways to Be a Musician
C. Talented Michael Jackson
D. A Clever Father
查看答案和解析>>
湖北省互聯(lián)網(wǎng)違法和不良信息舉報平臺 | 網(wǎng)上有害信息舉報專區(qū) | 電信詐騙舉報專區(qū) | 涉歷史虛無主義有害信息舉報專區(qū) | 涉企侵權(quán)舉報專區(qū)
違法和不良信息舉報電話:027-86699610 舉報郵箱:58377363@163.com