Imagine the situation. You are driving a car along a desert or on a mountain. You have no idea you are. You passed the last house two hours ago. Then your breaks down. It is night and it is cold. You have no mobile phone. What do you do? Well, next time take a with you. This invention may be able to help you. It is a device(裝置) which uses satellites 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 where you are.
GPS, which means Global Positioning System, is a small 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 . We also find GPS devices in cars, planes, or boats. Some of these devices have electronic , so you know where you are. For example, in a city they can tell you the name of the .
There are parts to the Global Positioning System. The first part is the . You can either hold it in your hand 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 the satellites and make sure they are working well.
Some people think that in the future the GPS will be
as as the mobile. They are
becoming and more and more accurate(精確的). The
re
are also new uses for the GPS. Perhaps they will become like .
Everyone will have one and you will never be lost again.
1.A.where B. what C. who D. how
2.A.ship B. car C. train D. plane
3.A.watch B. ring C. clock D.GPS
4.A.advise B. know C. represent D. speak
5.A.radio B. TV C. robot D. machine
6.A.room B. office C. road D. mobile phone
7.A.parts B. maps C. video D. music
8.A.studio B. teenager C. bus D. street
9.A. five B. four C. three D. two
10.A. sender B. receiver C. Internet D. system
11.A.and B. then C. but D. or
12.A.control B. achieve C. allow D. imagine
13.A.expensive B. special C. new D. common
14.A. cheaper B. easier C. more expensive D. bigger
15.A.computers B. robots C. satellites D. watches
1.A
2.B
3.D
4.B
5.A
6.D
7.B
8.D
9.C
10.B
11.D
12.A
13.D
14.A
15.D
【解析】試題分析：這篇文章講了GPS。GPS能夠定位你的方位，所以能讓你不再 迷路。它也是一個接受器，接收衛(wèi)星發(fā)回的信號。文章還分析了GPS的構(gòu)成以及發(fā)展趨勢。
1.考查疑問詞及對語境的理解。句意：你不知道你在哪。A.where在哪；B. what什么；C. who水；D. how怎樣。表示地方，用where。故選A。
2.考查名詞及對語境的理解。句意：這時你的車壞了。A.ship船；B. car汽車；C. train火車；D. plane飛機(jī)。由上句：You are driving a car，可知，你開的是車，故選B。
3.考查名詞及對語境的理解。句意：下一次，隨身帶一個導(dǎo)航儀。A.watch手表；B. ring戒指；C. clock 鐘表；D.GPS導(dǎo)航系統(tǒng)。根據(jù)下文：. A GPS cannot start your car, 故選D。
4.考查動詞及對語境的理解。 句意：至少你會知道你在哪。A.advise建議；B. know知道，了解；C. represent代表；D. speak說。導(dǎo)航儀能讓你知道方位，故選B。
5.考查名詞及對語境的理解。句意；GPS是一個小的收音機(jī)接收器。.A.radio收音機(jī)；B. TV電視；C. robot 機(jī)器人；D. machine機(jī)器。根據(jù)receiver可知，GPS有接收功能，只有收音機(jī)有接收功能，功能最接近。故選A。
6.考查名詞及對語境的理解。句意：在口袋里我們有時會放入一只表或者一個手機(jī)。A.room房間B. office辦公室C. road道路D. mobile phone手機(jī),根據(jù)現(xiàn)實情況，口袋里放的是手機(jī)。故選D。
7.考查名詞及對語境的理解。句意：這些裝置有時有電子地圖。A.parts部分；B. maps 地圖；C. video 錄像；D.music音樂。根據(jù)：so you know where you are.可知帶有的是地圖，故選B。
8.考查名詞及對語境的理解。句意：例如在一個城市里他們能告訴你街道的名稱。A.studio工作室；B. teenager青少年；C. bus公交車；D. street街道。根據(jù)導(dǎo)航儀的功能，故選D。
9.考查數(shù)詞及對語境的理解。句意：導(dǎo)航儀包含三個部分。A. five五；B. four四；C. three三；D. two二，根據(jù)The third part of the system ，故選C。
10.考查名詞及對語境的理解。句意：第一部分是一個接收器。A. sender發(fā)送者；B. receiver接收者；C. Internet電腦；D. system系統(tǒng)。根據(jù)第五題可知， 故選B。
11.考查連詞及對語境的理解。句意：你能把他拿在手中，也能固定在車上，或飛機(jī)上。A.and 和，又；B. then然后；C. but但是 ；D. or 或者。either....or...兩者選其一，故選D。
12.考查動詞及對語境的理解。句意：他們控制衛(wèi)星，確保衛(wèi)星正常運行。A.control控制;B. achieve達(dá)到;C. allow允許;D.imagine想象。根據(jù)衛(wèi)星的作用，是用來控制的，故選A.
13.考查形容詞及對語境的理解。句意：將來GPS將會像手機(jī)一樣普及。A.expensive貴的; B. special特殊的;C. new新的;D. common普通的。根據(jù)現(xiàn)實中手機(jī)的特點，故選D。
14.考查形容詞及對語境的理解.句意:他們會變得越來越便宜，也越來越精確。A. cheaper更便宜；B. easier更容易；C. more expensive更貴的；D. bigger更大的。根據(jù)上一句，會像手機(jī)一樣普及，可知是便宜，故選A。
15.考查名詞及對語境的理解。句意：GPS可能會變得像手表一樣A.computers電腦；B. robots機(jī)器人；C. satellites 衛(wèi)星； D. watches手表。根據(jù)：Everyone will have one and you will never be lost again.可知，這是手表的特性，故選D。
考點：科普類短文。
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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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