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优点英语2020-2021 学年高二期末复习热点话题阅读与题型专练 10话题:北斗导航卫星系统【1】阅读下面短文，在空白处填入 1 个适当的单词或括号内单词的正确形式。Up to now, 55 BeiDou satellites 1 (send) up ， meaning the completion of Chinas self-developedBeiDou Navigation(导航 ) Satellite System (BDS). BDS appears later 2 Americas GPS, RussiasGLONASS and EUs Galileo, but it can match them. As one of the fourth 3 (globe) navigation satellitesystems, BDS involves efforts of over 400 agencies and 300,000 research personnel and technicians.Originally 4 (plan) in the 1980s, the network represents a milestone in Chinas space effort. BDS iscomparable to GPS in terms of the 5 (accurate) of positioning. It also offers short messagecommunication and thus can provide emergency communications in areas 6 conventionalcommunication signals are poor in an effort 7 (improve) the quality of their positioning services, Appleand Samsung phones, among others, are already using BDSs signals, and so8 (be) every Chinese brand.The construction of complete BDS is a huge technical achievement for China and can 9 (easy) pay10in the near future. Meanwhile, BDSs great contribution to promoting the worlds economic and social development as well as the peaceful use of space has attracted the worlds attention.【2】阅读选择In the distant past, our ancestors relied on stars to guide them on a clear night. Today, we havenavigational(导航的)systems to help us find our way, the latest of which is the Beidou Navigation Satellite System (BDS).The BDS is entirely built by Chinese engineers. With the launch of the last satellite from the Xichang Satellite Launch Center on June 23, the global network of 59 satellites has been completed. On July 31,优点英语Beidou started providing services covering our whole planet.Its difficult to imagine the grea t influence those satellites have on our daily lives. When you unlockone of Hellobikes bicycles, you are using the BDS. “The intelligent lock on each bike receives Beidousatellite signals and sends positioning information to the data center which will help collect big data on thebikes and predict users riding needs in advance according to the data,” Chu Yiqun, a manager of Hellobikementioned. Users can also find shared bikes more accurately(精确地) thanks to Beidous global positioning accuracy of 2.34 meters.Beidou adopts a unique two-way communication system, including its ability to receive messages sentby people from areas with poor communication signals. Obviously this function isnt designed for users to chat online. Instead, it plays a role when disasters occur and communications are blocked.After the Wenchuan Earthquake in 2008, all ground-based communication facilities were interrupted.Though the first generation of Beidou could only send 120 characters in a single message at that time,communication between affected areas and rescue(救援) centers was successful. Now, Beidous messagingability has been increased to 1, 200 Chinese characters in a single message. It is widely used in disaster alarms, automatic identification and information release.As Sun Jiadong, former chief designer of the BDS said: “ The application(应用) of Beidou is only limited by imagination.”11What can we learn about the BDS from the passage?AIt was developed by Chinese and American engineers.BIt works better on clear nights.CIts last satellite was launched on July 31.DIts able to provide global coverage for navigation.12Why does the author mention Hellobike in Paragraph 3?ATo stress the excellent positioning ability of the BDS.优点英语BTo show how the BDS makes peoples daily lives easier.CTo present the advantages and disadvantages of the BDS.DTo explain how the BDS works.13What is Beidous two-way communication system designed for?ATo help people when communication signals are poor.BTo make users daily communication more fun.CTo allow users to chat online more freely.DTo collect data from users for the data center.14What does the underlined sentence in the last paragraph mean?ABeidou may be more helpful than we know.BBeidou inspires users imagination.CBeidou needs to be further improved.DBeidou is limited in application.参考答案1have been sent2than3global4planned优点英语5accuracy6where7to improve8is9easily10off【分析】本文是一篇新闻报道。文章主要介绍了中国自主研发的北斗导航卫星系统。1考查现在完成时的被动语态。句意：直到2020 年 6 月 23 日，已经发射了 55 颗北斗卫星，意味着中国自主研发的北斗导航卫星系统已经完成。本句描述过去发生的事情对现在的影响用现在完成时， 55 BeiDou satellites 与 send 是被动关系，用被动语态，故填 have been sent。2考查介词。句意：北斗导航卫星系统比美国的 “ 全球定位系统 ”、俄罗斯的 “GLONASS”和欧洲的“ 伽 利略”出现的晚一些。根据形容词比较级 later 可知，此处应填“比”，故填 than。.3考查形容词。句意：作为全球第四大导航卫星系统，北斗导航卫星系统中包含超过 400 家机构、300000个研究者和技术人员的努力。根据句子结构可知，此处应填形容词，修饰名词短语 navigation satellite systems，故填 global。4考查过去分词。句意：这个网络的计划起始于 20 世纪 80 年代，它代表着中国空间站努力的里程碑。根据句子结构可知，空格处是句子的状语，the network 与 plan 是动宾关系，表示被动，所以用过去 分词作状语。故填 planned。优点英语5考查名词。句意：在定位的精确性方面，北斗导航卫星系统可以与全球定位系统相比。作in terms of 的宾语用名词，根据句意故填“精确”，不可数名词，故填 accuracy。6考查定语从句。句意：它也能提供短信通讯。这样就可以为通讯信号差的地方提供紧急通讯。根据句意及句子结构可知，此处引导定语从句，先行词是 areas，在从句中作地点状语，故填 where。7考查非谓语动词。句意：为了改善定位服务的质量，苹果手机、三星手机准备使用北斗导航卫星系 统的信号。in an effort to do sth.意为“努力做某事，为了做某事”，故填 to improve。8考查时态和主谓一致。句意：每个中国的品牌也是如此。陈述的是客观事实，用一般现在时，此处使用的是倒装句式“so+be+主语”，表示：也是，主语 every Chinese brand 是单数名词，故填 is。.9考查副词。句意：建设完北斗导航卫星系统对中国来说，是技术上的巨大成就，它在不远的将来可 以容易地实现。修饰谓语动词用副词，故填 easily。 ，10考查介词。句意：建设完北斗导航卫星系统对中国来说，是技术上的巨大成就，它在不远的将来可 以容易地实现。pay off 是一个固定短语，意为：付清，取得成功。故填 off。11D12B13A优点英语14A【分析】本文是说明文。文章介绍了北斗导航卫星系统在我们生活中的应用。11细节理解题。文章第二段中提到“the global network of 59 satellites has been completed. On July 31,Beidou started providing services covering our whole planet. ”北斗系统的全球 59 颗卫星网络已经完成，北斗系统开始提供覆盖全球的服务。由此可知，北斗系统能够提供全球范围的导航服务。故选D。12推理判断题。文章第三段中提到“Its difficult to imagine the great influence those satellites have onour daily lives.（很难想象这些卫星对我们日常生活的巨大影响）”；下文举出 Hellobike 的例子，“Whenyou unlock one of Hellobikes bicycles, you are u sing the BDS. （当你解锁一辆 Hellobike 自行车时，你就使用了北斗系统）”和“Users can also find shared bikes more accurately(精确地) thanks to Beidousglobal positioning accuracy of 2.34 meters.（由于北斗全球卫星定位精度可达到 2.34 米，用户还可以更准确地找到共享自行车）”。由此可知，作者是以 Hellobike 为例说明北斗系统对人们日常生活的影 响，以及如何让人们的日常生活更轻松。故选 B。13细节理解题。根据第四段中“Beidou adopts a unique two-way communication system, including its abilityto receive messages sent by people from areas with poor communication signals.（北斗系统采用独特的双向通信系统，能够接收来自通信信号较差地区的人们发送的信息）”和“it plays a role when disastersoccur and communications are blocked. （当灾难发生、通讯中断时，它就会发挥作用）”可知，北斗 双向通信系统是为了在通讯信号不好或者信号中断时帮助人们。故选 A。14词句猜测题。最后一段中前首席设计师孙家栋说 “The application of Beidou is only limited byimagination.（北斗的应用只受到想象力的限制）”，意即北斗系统还有更多的其他的应用，是人们还 没有想象到的。北斗系统对我们的帮助可能比我们能想到的更多。故选 A。
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