题目内容
14.Imagine the situation.You are driving along 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 invention may be able to help you.It is a device(装置) which uses satellites to find the user's position.It can find your position to within 20meters.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 you 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 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.
66.According to the passage,with the help of the GPS,peopleA.
A.can't be lost in a new city
B.can't find their way in different counties
C.can learn about the culture of an unknown place
D.can spend the least time getting to another place
67.We can learn from the passage thatA.
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
68.The underlined word"They"in paragraph 3means"D".
A.Receivers
B.GPS devices
C.Satellites
D.Ground stations
69.The passage is mainly aboutB.
A.The history of the GPS
B.the introduction of GPS
C.the shape of the GPS
D.the three parts of the GPS
70.What can we infer(推断) from the passage?D
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.
分析 这篇短文主要介绍了卫星定位系统的工程及工作原理.
GPS虽然不会启动你的车,但是他会告诉你你在哪!
GPS是全球无线电定位系统,是一个小型的信号接收器.他看上去像是一部手机.
全球定位系统包括三个部件:接收器、环绕地球的卫星和地面接收站网络,这个站可以控制卫星.
一些人认为GPS会和手机一样变得普遍,它们变得越来越便宜并且越来越精准.
解答 66.A.细节理解题.根据A GPS cannot start your car,but at least you will know where you are.可知,你通过GPS可以知道你所处的具体位置,因此这样你在全球任何一个国家都会知道你在哪,也就是说不会迷路,因此答案为A.can't be lost in a new city
67.A.推理判断题.根据There are three parts to the Global Positioning System.可知,全球定位系统包括三个组分,因此A正确;根据It is sometimes put into a watch or a telephone.可知,GPS有时被安装在手表或手机上,因此B选项错误;根据A GPS cannot start your car,but at least you will know where you are.可知GPS并不能帮你启动汽车,C选项错误;根据They are becoming cheaper and more and more accurate(精确的)可知,GPS变得越来越便宜并且越来越精准,因此D选项错误;故选A
68.D.词义猜测题.根据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.可知,划线词所在句子的前一句写的是GPS拥有第三个部分是地面指挥站,之后说它们能够控制卫星,因此这里的they代表的是地面指挥站,因此答案为D.Ground stations
69.B.细节理解题.根据文中的内容,该文的主要内容是介绍卫星定位系统的工程及其组成,因此答案为B.the introduction of GPS
70.D.推理判断题.根据Some of these devices have electronic maps,so you know where you are.可知,有些设备具有电子地图,并不是全有,因此A错误;B选项文章中没有提及,只是说GPS会越来越便宜,因此B选项错误;根据The receiver contacts at least four of the satellites and calculates its position.可知,接收器至少连接四个卫星,因此C选项错误;根据Everyone will have one and you will never be lost again. 可知,每个人在以后都会拥有GPS,也就是说GPS在日常生活中会变得非常普遍,因此D选项正确;
点评 本文是一篇科普类文章.题目涉及到词义猜测、推理判断和主旨大意题等,要在抓住关键句子的基础上进行合理地分析才能得出正确答案,切记不能乱猜,一定做到有理有据.
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Last year,Alice died.I was very 77sad and decided not to invite the children for Christmas breakfast.But Kathy and Pete,my next door 78neighbors,asked me to join them for dinner 79on Christmas Eve.
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