题目内容
Satellites are an important part of our ordinary lives. For example, the information for weather forecasts is sent by satellite. Some satellites have cameras which take photographs of the Earth to show how clouds are moving .Satellites are also used to connect our international phone calls.
Computer connections of the World Wide Web and Internet also use satellites. Many of our TV programs come to US through satellites. Airplane pilots also sometimes use a satellite to help them find their exact location.
We use satellites to send television pictures from one part of the world to another. They are usually 35,880 kilometers above the equator. Sometimes we can see a satellite in the sky and it seems to stay in the same place. This is because it is moving around the world at 11,000 kilometers an hour—exactly the same speed that the earth rotates. A satellite must orbit the Earth with its antennae facing the earth. Sometimes, it moves away from its orbit,So there are little rockets on it which are used to put the satellite back in the right position .This usually happens about every five or six days.
Space is not empty! Every week, more and more satellites are sent into space to orbit the Earth. A satellite usually works for about 10-12 years. Satellites which are broken are sometimes repaired by astronauts or sometimes brought back to Earth to be repaired. Often,very old or broken satellites are left in space to orbit the Earth for a very long time. This is very serious because some satellites use nuclear power and they can crash into each other.
51.Which of the following is NOT done by satellites according to the passage?
A. Sending information for weather forecast. B. Taking photographs of the Earth.
C. Sending TV pictures. D. Providing food for airplane pilots.
52.What’s the speed the earth rotates at?
A.35,880 kilometers per hour. B.335,880 kilometers per hour.
C.11,000 kilometers per hour. D.110,000 kilometers per hour
53.Why does the satellite move around the world at the same speed as the Earth rotates?
A. In order to take photographs. B. In order to stay in a certain position in the orbit.
C. In order to move away from its orbit. D. In order to send television pictures.
54.What does the underlined word “This” in the 3rd paragraph refer to?
A. A satellite. B.A little rocket.
C. A satellite seems to stay in the same place in the sky.
D. The satellite puts the rockets in the right position.
55.Which is true of satellites?
A. A satellite usually works for about 10-12 years.
B .Every time a satellite gets broken,it is brought back to the Earth to be repaired.
C. A broken satellite is never left in space.
D. They often crash into each other.
BDDBA
【小题1】These satellites go round ____.
A.the earth | B.the moon | C.the sun | D.the stars |
A.terrible | B.useful | C.unknown | D.not necessary |
A.anything interesting | B.what other people are doing |
C.foreign programs | D.colour films |
A.write down | B.send birthday presents |
C.pay visit | D.make telephone calls |
The Internet, mobile phones and iPads are part of our lives now. Technology is greatly affecting all ways of our lives, from the ways we work to the ways we play. And it even causes a number of social problems such as cloning humans.
We have had lots of technology and it has changed our lives a lot. There is no doubt that humans will continue to use more and more technology. Here are some examples of modern technology that will change our ideas and will affect our lives greatly.
Global Positioning System (GPS) (全球定位系统)
It’s a system that uses radio signals from satellites to show exact (精确的) information. It tells you where the user is on the earth in all weather conditions. It’s made up of three parts: satellites, control equipments (设备) on land and receivers.
Space Technology
Russian and American scientists have worked together for the International Space Station (ISS) for a long time. They hope the ISS will provide a long-lasting lab. Such a lab will bring humans limitless (无限的) advantages. It’s even hoped that one day space technology will take humans to their new houses in space.
Underwater Robot
Hercules is a kind of underwater robot with some high technology equipments. It will be used to search for ancient ships which were destroyed into the deep sea during their journey long ago.
The world is changing so quickly that it’s hard for us to catch up with all the new inventions because they seem to come out every month. It’s important for us to learn about new technology and the role that it plays in our lives. So we should be willing to accept modern technology, or we will fall behind the times.
【小题1】 can tell you where the user is on the earth exactly.
A.Satellites | B.Receivers |
C.Global Positioning System | D.Underwater Robot |
A.It has carried people to other planets. |
B.It will provide a long-lasting lab for us. |
C.Russia and America are working for it. |
D.Humans will get a lot of advantages from it. |
A.save lives in the sea |
B.take pictures in the sea |
C.repair the broken ships |
D.look for the ancient ships in the sea |
A.the use of GPS is affected by the weather conditions |
B.it’s very important for us to learn about new technology |
C.it’s easy for us to catch up with all the new inventions |
D.technology brings us many advantages such as cloning humans |
A.To help us study some new technology. |
B.To tell us technology is changing the world. |
C.To help solve the problems that technology causes. |
D.To remind us the advantages of technology are limitless. |
Now satellites are helping to forecast the weather. They are in space, and they can reach any part of the world. The satellites take pictures of the atmosphere(大气), because this is where the weather forms. They send these pictures to the weather stations. So meteorologists(气象学家)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 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).
【小题1】Satellites travel ___________.
A.in space | B.in the atmosphere |
C.above the ground | D.above space |
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 |
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 |
A.one day | B.two days |
C.five days | D.seven days or even longer |
A.taking pictures of the atmosphere |
B.receiving pictures of the atmosphere |
C.doing other work in many ways |
D.weather forecasting |
Now satellites(卫星)are helping to forecast the weather. They are in space and they can reach any part of the world. The satellites take pictures of the atmosphere(大气), because this is where the weather forms(形成). They send these pictures to the weather station. So meteorologists(气象专家)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(比较)them with earlier ones. Perhaps they may find that the clouds have changed during the last few hours .This may mean 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 3 or 5 days. Soon, perhaps , they may forecast the weather for a week or more ahead(提前)
【小题1】Satellites travel__________.
A.in space | B.in the atmosphere |
C.above the ground | D.above space |
A.the weather satellites can do it easily |
B.clouds form there |
C.the weather forms there |
D.the pictures can forecast the weather |
A.when they have received satellite pictures |
B.after they have compared new satellite pictures with earlier ones |
C.before they receive satellite pictures |
D.while they study satellite pictures |
A.one day | B.two days | C.five days | D.seven days or even longer |
A.taking pictures of the atmosphere |
B.receiving pictures of the atmosphere |
C.doing other work in many ways |
D.weather forecasting |