Wind is the great maker of waves. There are exceptions (例外), such as the tidal (潮汐的) waves sometimes caused by earthquakes under the sea. But the waves most of us know are caused by winds blowing over the sea .
Now let’s learn some physical (自然地理学的) things about it. A wave has height, from low point to high point . It has length (长度)--the distance from this high point to that of the following wave. The period of the wave means the time it takes for succeeding high points to pass a fixed point. None of these things stays the same--for all depend upon (依靠)the wind, upon the depth (深度) of the water and many other matters.
The water that makes up a wave does not advance with it across the sea. Each drop of water turns around in a little circle with the passing of the wave, but returns very nearly to its original position (原先的位置). And it is lucky that this is so. For if the huge groups of water that make up a wave really moved across the sea, sailing would be impossible. If we want to find the speed of a wave, we may use the following way : Speed =" wavelength" × frequency (频率).
Here, wavelength is the distance between two high points , frequency means the number of cycles per second What causes waves?
A.Earthquakes and nothing else. | B.Only wind. |
C.Wind causes most waves. | D.Wind causes some waves. |
Which of the following is TRUE according to the passage?
A.The water of a wave moves away across the sea. |
B.The water of a wave remains almost at the same place. |
C.The water of a wave goes with the passing of the wave. |
D.The length of a wave means the distance from the top of a wave to the bottom. |
The speed of Wave 1 is 100 cm/s, frequency 10. The frequency of Wave 2 is 300, while its speed is twice that of Wave 1. Which of the following is right?
A.The wavelengths of the two are equal. |
B.The wavelength of Wave 1 is 10 times longer than that of Wave 2. |
C.The wavelength of Wave 2 is longer than that of Wave 1. |
D.The wavelength of Wave 1 is longer than that of Wave 2. |
Where can we find this passage?
A.music magazine | B.fashion magazine | C.scientist magazine | D.sports magazine |
Mr. Hunt came from a poor family. He had three brothers and two sisters. His father worked hard but wasn’t paid much. And his mother did all the housework at home. They were both able but they couldn’t get enough money for their family.
Mr. Hunt was in school for only three years and he had to stop to help his parents though he was good at his lessons. When he was sixteen, he came to the city and began to work in a small factory. He learned from an old worker and became a skilled worker. The old worker liked him and married his daughter to him. The young man did not have his own house and had to live with his parents-in-law. His mother-in-law always thought he was poor and often chattered. So the young man tried to save everything and hoped to have his own house.
It was one fine Sunday. The old woman wanted to have a picnic on the top of the hill. She told Mr. Hunt to drive her car. But sometimes she told him to turn left and sometimes to turn right. The young man had to listen to her. At a crossing the lights were red but she made him turn left. The policeman stopped them and told the young man to give his license to him.
“If I did wrong, sir,” said Mr. Hunt, “It was my mother-in-law’s fault(过错). She was driving the car though she sat behind me!” The Hunts were poor because ____.
A.they were lazy |
B.they were too weak to work |
C.they couldn’t make enough money |
D.they weren’t able enough |
Mr. Hunt left the school because ____.
A.he didn’t like studying |
B.his family was poor |
C.he wasn’t clever |
D.he hoped to stay at home |
____, so the old man married his daughter to him.
A.Mr. Hunt became a skilled worker |
B.Mr. Hunt was friendly to him |
C.Mr. Hunt was paid much in the factory |
D.Mr. Hunt worked for six years there |
The old woman was ____ to Mr. Hunt.
A.good | B.bad | C.friendly | D.useless |
Which of the following is wrong?
A.The old woman herself drove the car that day. |
B.It was the old woman’s fault. |
C.Mr. Hunt hated his mother-in-law. |
D.The old woman told Mr. Hunt to run the red lights. |
Some Advice on Travel
1. Forget fashion(时尚)! Always wear your most comfortable clothes when going on long journeys(旅行).
2. Traveling on trains and buses can be boring, so take a good book to read.
3. If you’re going somewhere cold, remember to put on your warm clothes!
4. If you are going somewhere sunny, remember to bring your sun-block(防晒霜) and sunglasses.
5. Always take a camera with you to capture those special moments.
6. Be careful with your things whenever you go to a busy place, like a train station. There are many thieves there!
7. Most countries have lower prices for students, so if you are a student, take your student card with you.
8. Always leave room in your bag and buy presents on the way home.
9. Bus tours often stop at expensive shops along the way, save your money by buying presents at local shops.
10. If you travel abroad(国外), remember to take your passport. Whatever you do, don’t lose it! If you go to Hainan Island for a trip in summer, you should take ____ with you.
A.warm clothes and sports shoes |
B.sunglasses and sun-block |
C.fashionable(时尚的) clothes and a big bag |
D.some fruit and drinks |
According to the passage, ____ is a good way to keep away from boredom(单调) while you’re on a train or a bus.
A.taking a camera | B.reading a good book |
C.listening to music | D.sleeping for some time |
You must always ____ while you are at busy places because there are often thieves there.
A.put your things away | B.look after your things well |
C.give your things away | D.get your things ready |
If a student wants to buy some presents at lower prices while traveling, he should show ____ to the shop assistant.
A.prices | B.his things |
C.his passport | D.his student card |
The underlined word “capture” in this passage means ____.
A.拍摄 | B.感受 | C.抓住 | D.控制 |
When you are not well, you may have to _______. The medicine may be not nice to take, but you have to take it, because it will do you good. After a few days, you will get better and you won’t have to take any more medicine. In a short time you will be in good health again, and you will go back to school.
In the cold season, many people catch colds. When you have a cold, your nose is running, so you have to blow (擤) your nose and wipe (擦) it with your handkerchief (手帕).
A bad cold with a high temperature is called flu. When you have the flu, you may pass it to other people around you, because it is very catching (有传染性的). So when you have the flu, you must stay at home.
When you have a bad tooth, you go to see the dentist. He pulls out the bad tooth and looks over the others.
You should look after yourself. If you want to be healthy, you have to take exercise and eat a balanced diet (均衡饮食).
根据短文内容,完成下列各题。在空白处填上一个词组___________。
完成句子:If you ___________, you won’t have to take any more medicine.
把画线部分翻译成汉语。
________________________________________________________________________Why should we stay at home when we have the flu?
________________________________________________________________________What should we do to keep healthy?
________________________________________________________________________
During the day we work and play,and at night we sleep. Our body rests when we sleep. In the morning we are ready to work and play again. Our body grows most when we are asleep. Children who are tired usually need sleep. We can get better at our lessons after having plenty of rest. Boys and girls who are eight or nine years old need ten hours of sleep every night. Our body needs plenty of air when we are asleep. If we do not get enough fresh air, we will feel tired when we wake up. While in bed we must not cover our head,our lungs need to get enough fresh air. If we open our windows at night,we can have plenty of fresh air. Cool air is better than warm air.Our body grows most while we are _______.
A.eating | B.playing |
C.sleeping | D.exercising |
Too little sleep makes us _______.
A.tired | B.hungry | C.happy | D.grow |
—What may cause us to feel tired in the morning?
—_______ during the sleep.
A.Too much air | B.Not enough fresh air |
C.Too much cold air | D.Too much sleep |
How many hours of sleep should 9-year-old children have every night?
A.8 hours. | B.9 hours. |
C.10 hours. | D.11 hours. |
What do the lungs need most?
A.Fresh air. | B.Covering. |
C.Warm air. | D.Exercise. |
In the world, soccer(or football) is the most popular sport. This is because many countries have wonderful teams for the World Cup. The World Cup is held every four years.
To remember the 2002 FIFA World Cup, children from different countries and more than 60 children from Japanese schools came together and spent three weeks drawing a big picture called“Dream(梦幻)World Cup”in Japan. The children drew animals, flowers and people playing soccer under a bright blue sky. They wished each football team good luck by drawing the flags(旗帜) of all countries that would take part in the World Cup in Japan and South Korea. The picture was put up in a park near a playground in Yokohama.
Are you a football fan? The World Cup makes more and more people interested in football. Teenagers like playing and watching football. Many of them love some football stars so much that they get pictures of their favorite players such as Figo, Oven and Pauleta. And they put the pictures up on the walls of their rooms. That is the way to show their love for the World Cup.If a country wants to take part in the World Cup, it must have _______.
A.many football fans | B.a very good football team |
C.many football players | D.a big playground |
The next World Cup will be held in _______, after 2006.
A.2007 | B.2008 | C.2009 | D.2010 |
From the passage, in the picture children drew many things except (除了) _______.
A.some football stars |
B.people playing football |
C.a sunny sky |
D.flowers |
In “Dream World Cup”, the children drew the flags of some countries _______.
A.to show their love for their own countries |
B.to tell the people their stories |
C.to show their good wishes for the football teams |
D.to show their new ideas about football |
Many teenagers (青少年) own pictures of some football stars because _______.
A.they are interested in football |
B.they are football fans |
C.they think their favorite players are great |
D.A, B and C |