Question

Satellites(卫星) 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（赤道）．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(天线)facing the earth．Sometimes, it moves away from its orbit（轨道），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（撞）into each other．

1.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．

2.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

3.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．

4.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．

Answer

1.D

2.C

3.B

4.C

【解析】

这是一篇说明文。本文介绍了卫星在我们日常生活中的作用，让我们对卫星有了更好的认识。

1.细节理解题。本题采取排除法。根据第一段和第三段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. We use satellites to send television pictures from one part of the world to another可知，卫星可以发送天气预报的信息，拍摄地球的卫星图，发送电视图片，而给飞行员提供食物是卫星做不了的。故选D。

2.细节理解题。根据第三段it is moving around the world at 11，000 kilometers an hour—exactly the same speed that the earth rotates.可知卫星环绕地球的速度是 11，000 千米每小时，和地球自转速度相同。所以地球自转的速度11000公里每小时。故选C.

3.细节理解题。根据第三段A satellite must orbit the Earth with its antennae(天线)facing the earth．Sometimes, it moves away from its orbit（轨道），So there are little rockets on it which are used to put the satellite back in the right position可知，卫星必须绕地球轨道运行，其天线必须面朝地球。有时，卫星会偏离轨道，因此卫星上几乎没有火箭，用来将卫星放回正确的位置。所以卫星旋转速度和地球自转速度相同，是为了在轨道上保持一定的位置。故选B。

4.词义猜测题。This前一句Sometimes we can see a satellite in the sky and it seems to stay in the same place有时我们看到天空中有一颗卫星，它似乎不动呆在一个位置。This后一句This is because it is moving around the world at 11，000 kilometers an hour—exactly the same speed that the earth rotates这是因为.卫星环绕地球的速度是 11，000 千米每小时，和地球自转速度相同。所以通过上下文判断出，This指的是“卫星在天空中似乎在一个不动的位置”。故选C项。