Imagine the situation. You are driving along 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. 小题1: You have no mobile phone. What should you do? Well, next time take a GPS with you. This invention may be able to help you. 小题2: It can find your position to 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 like a mobile phone. 小题3: We also find GPS devices in cars, planes, or boats. Some of these devices have electronic maps, so you know where you are. 小题4:
Some people think that in the future the GPS will be as common as the mobile. 小题5: here are also new uses for the GPS. Perhaps they will become like watches. Everyone will have one and you will never be lost again.
| A:It is a device(装置) which uses satellites to find the user’s position. B: For example, in a city they can tell you the name of the street. C:It is night and it is cold. D: There are three parts to the Global Positioning System. E: You can hold it in your hand, or put in your pocket. F:They are becoming cheaper and more and more accurate(精确的). |
小题1:C
小题2:A
小题3:E
小题4:B
小题5:F
题目分析：这篇短文介绍GPS定位系统。它可以在20米内搜寻到你的位置，非常方便。有些装置还置有电子地图，并预测了为来的定位系统将会非常普及。
小题1:细节理解题。联系上下文，可知都是在描述假设你当时所处的情况，故选C，正是夜晚还很冷。
小题2:细节理解题。根据下文It can find your position to within 20 metres.“它可以在20米内搜寻到你的位置。”可知是在介绍这一定位系统，故选A，这是一个利用卫星找到使用者的位置。
小题3:细节理解题。根据后文We also find GPS devices in cars, planes, or boats.“我们还能在车上、飞机上或者船上找到GPS。”可知是在介绍GPS的使用位置，故选E，你可以把它放在手里或者口袋里。
小题4:细节理解题。根据上文介绍Some of these devices have electronic maps, so you know where you are.“有些装置有电子地图，所以你知道你在哪？”可知下文应该继续介绍电子地图。故选B，例如，在城市里可以告诉你街道的名字。
小题5:细节理解题。根据上文Some people think that in the future the GPS will be as common as the mobile.“有些人认为未来GPs会像手机一样普遍。”可知此处要继续介绍未来的GPS。故选F，他们会变得更便宜更精准。
应变计组成的监测网，以便更好地监测地壳的变化，但直到现在，准确预报地震仍是一个梦想。