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. 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 invention may be able to help you. It is a device(裝置) which uses satellites (衛星) to find the user’s position(位置). 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. You can hold it in your hand, or put 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 of 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 calculates(計算) 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 accurate(精確的). 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．can’t be lost in a new city
B．can’t find their way in different countries
C．can learn about the culture of an unknown place
D．can spend the least time getting to another place
2.We can learn from the passage that ____________.
A．there are three parts to the GPS
B．a GPS can’t be put into a watch
C．a GPS can help you start your car
D．the GPS are becoming more and more expensive
3.The underlined word “They” in paragraph 3 means “____________”.
A．Receivers B．GPS devices C．Satellites D．Ground stations
4.The passage is mainly about _______________.
A．the history of the GPS B．the introduction of the GPS
C．the shape of the GPS D．the three parts of the GPS
5.What can we infer(推斷) from the passage?
A．All GPS devices have electronic 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.
1.A
2.A
3.D
4.B
5.D
【解析】短文大意：這篇短文主要介紹了衛星定位系統的工程及工作原理。
1.根據短文第一段It can find your position to within 20 metres. A GPS cannot start your car, but at least you will know where you are.描述，可知衛星定位系統能讓你知道自己在哪兒。故選A，不會在新城市中迷路。
2.根據第三段There are three parts to the Global Positioning System.描述，可知衛星定位系統有三個部分。故選A。
3.聯系下文The third part of the system is a network of ground stations.描述，可知指的是地面接收站。故選D。
4.這篇短文主要介紹了衛星定位系統的工程及工作原理。故選B，介紹衛星定位系統。
5.根據短文最后一段描述，可知衛星定位系統在日常生活中會變得越來越普通。故選D。
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C．Remember the words of a song . D．help teach some school subjects.
3.The underlined word positive in paragraph 2 most probably means _____
A．bad B．good C．final D．direct
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A．maths B．science C．history D．literature
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Rapping in class.
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Whose idea was Flocabulary?
Blake Harrison, a high school student, was the first person to come up with the idea of Flocabulary . The word “ Flocabulary ” comes from the word “ flow ” and “ vocabulary ” . “ Flow ” is a rap word for “ style ”,or the way a rapper says the words of a song . “ Vocabulary ” means the words you have to learn in a language . How did he get the idea ? Well, he realized he could remember the words of a hip hop song very easily . So,why not make lessons into songs ? Today together with Alex Rappaport, a song writer, Blake produces hip hop songs for maths, science and literature (文學 ）. They are now used in schools with great success .
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A. in the 1970s B. In a high school
C.in the 19 th century . D. In a music class .
54. From the passage, we can learn “ Flocabulary ” is a program to _____ .
A. Write rap music . B. Sing a song by talking .
C. Remember the words of a song . D. help teach some school subjects .
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A. bad B. good C. final D direct
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