1、Unit5 阅读理解专练Imagine the situation. You are driving alone in a desert or on a mountain. You have no idea where you are. You passed the last house two hours ago. Then your car breaks down. It is night and it is cold. You have no mobile phone. What do you do? Well, next time take a GPS with you. This i
2、nvention may be able to help you. It is a device (装置） which uses satellites to find the users position(位置）.It can find your position within 20 metres. A GPS cannot start your car, but at least you will know where you are.GPS, which means Global Positioning System, is a small radio receiver. It looks
3、 like a mobile phone. You can hold it in your hand, or put it in your pocket. It is sometimes put into a watch or a telephone. We also find GPS devices in cars, planes, or boats. Some of these devices have electronic maps, so you know where you are. For example，in a city they can tell you the name o
4、f the street.There are three parts to the Global Positioning System. The first part is the receiver. You can hold it in your hand, or have it fixed into your car, plane, etc. The second part is a group of satellites orbiting the Earth. The receiver contacts at least four of the satellites and calcul
5、ates（计算）its position. The third part of the system is a network of ground stations. They are all over the world. They control the satellites and make sure they are working well.Some people think that in the future the GPS will be as common as the mobile. They are becoming cheaper and more and more a
6、ccurate（精确的）.There are also new uses for the GPS. Perhaps they will become like watches. Everyone will have one and you will never be lost again.1. According to the passage, with the help of the GPS, people _.A. cant be lost in a new cityB. cant find their way in different countriesC. can learn abou
7、t the culture of an unknown placeD. can spend the least time getting to another place2. We can learn from the passage that _.A. there are three parts to the GPSB. a GPS cant be put into a watchC. a GPS can help you start your carD. the GPS are becoming more and more expensive3. The underlined word “
8、They” in paragraph 3 means “_”A. Receivers B. GPS devicesC. Satellites D. Ground stations4. The passage is mainly about _.A. the history of the GPSB. the introduction of the GPSC. the shape of the GPSD. the three parts of the GPS5. What can we infer（推断）from the passage?A. All GPS devices have electr
9、onic maps.B. People in many countries will use the GPS for free.C. The receiver of the GPS contacts at least five of the satellites.D. The GPS will become more and more common in everyday life.参考答案及解析1. A 根据前两段内容可知。2. C 根据短文第二段的第三句话可知。3. D 单词“industry”表示“工业” 。4. D 根据短文第三段的内容可知。5. C 第二段主要介绍了欧洲的造纸的情况。
