Question

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(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（核） power and they can crash 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 3^rd 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】

试题分析：这篇短文讲述卫星的重要性以及行星的运转规则。卫星在我们生活中非常重要，我们的天气预报、互联网、电视节目等都要依靠卫星来传输信号，因此没有卫星的生活将会非常乏味而落后。

1.细节理解题。根据第一段For example, the information for weather forecasts is sent by satellite．可知A正确；Some satellites have cameras which take photographs of the Earth to show how clouds are moving．可知B正确；根据第三段第一句话We use satellites to send television pictures from one part of the world to another．可知C正确；而D项文中没有提到，故选D。

2.细节理解题。根据第三段第三行This is because it is moving around the world at 11，000 kilometers an hour—exactly the same speed that the earth rotates．“这是因为它以一小时11000千米的速度绕着世界运动，和地球自转的速度完全一样。”可知地球自转的速度是一小时11000千米。故选C。

3.细节理解题根据第三段第二行Sometimes we can see a satellite in the sky and it seems to stay in the same place．“我们有时候看到天空中的行星好像待在同一个地方。”以及第四行A satellite must orbit the Earth with its antennae(天线)facing the earth．“一个行星必须用它的天线面对着地球围着地球飞行。”可知和地球速度一样是因为要待在轨道上的固定位置，故选B。

4.词义猜测题。This指代上文提到的句子Sometimes we can see a satellite in the sky and it seems to stay in the same place．“我们有时候看到天空中的行星好像待在同一个地方。”解释这一现象的原因，故选C。

考点：科普类短文阅读。