2023年中考英语时事热点阅读专练 热点13 中国北斗卫星导航系统(学生版+解析版).docx

2023年中考英语时事热点阅读专练热点13中国北斗卫星导航系统一、阅读理解1Atthemomentof9:43a.m.,onTuesday,June23rd,2020,attheXichangSatelliteLaunchCenter（卫星发射中心）inSichuanProvince,thelastsatelliteofthethird-generationnetwork（第三代导航系统）wassentintospace.Itisthe55thmemberinthefamilyofBeiDou.ItbelongstoChinasBeidouNavigationSatelliteSystem（BDS北斗卫星导航系统）.Sofar,allthemembersofBeidou,59satellites,havebeenlaunchedintospace.WiththedevelopmentofChina,wehavealreadyownedthreeotherfamoussatellitelaunchcenters一Jiuquan,TaiyuanandWenchang.Now,thesatelliteworkswellwithotherBeidousatellitestogether.Sofar,Chinahascompletedthethird-generationnetworkofChinasBDS.Itwasanewmilestoneinthenationsspaceresearchwork.Thelaunchshowedthatourcountryhascompletedourlargestspace-basedsystem.Itsoneoffourinternationalnet-works,includingtheUnitedStatesGPS,RussiansGLONASSandtheEuropeanUnionsGalileo.BDShasbeenwidelyusedaspublicresourcesinourdailylife.Ithasbeensharedbythewholeworld.Itwillprovidemoreservicesaroundtheworld.BDSisthecommonwealthofthedevelopmentofhumanbeings.1. WheredidChinalaunchthelastsatelliteofthethird-generationnetwork?A. Xichang.B.Jiuquan.C.Wenchang.2. HowmanymembersarethereinthefamilyofBeidou?A. 5.B.55.C.59.3. Whatdoestheunderlinedword“milestone”meaninChinese?A. 起点B.里程碑C.事业GLONASSbelongsto.A.ChinaB.RussiaC.theUnitedStatesAccordingtothepassage,wecanknowthat.A. BDShasbeensharedonlybyChineseThelastsatelliteofBDSwaslaunchedat9:43p.m.,June23rd,2020B. Sofar,Chinahascompletedthethird-generationnetworkofChinasBDStowithinafewmeters,BDSreducestheerrortocentimeters.Thishigh-precisionserviceis52.(use)forlandsurveying,mapping,agricultureandautomateddriving.ChinaiswillingtoshareBDSwiththeworld.AccordingtoRan,BDSproductshavebeenexportedtomorethan120countriesandregions.TheBeidousystemwillalwaysadheretothedevelopmentconceptofChinasBeidou,theworldsBeidou,andthefirst-classBeidou,servingtheworldandbenefitingmankind,”Rantoldreportersafterthelatestlaunch.Headdedthatfutureplanscallforasmarterand53.(accessible)systemwithBeidouatitscore,tocomeonlineby2035.Bythen,wecanprobablysaythatRomehasfinallybeenbuilt.2023年中考英语时事热点阅读专练热点13中国北斗卫星导航系统一、阅读理解1Atthemomentof9:43a.m.,onTuesday,June23rd,2020,attheXichangSatelliteLaunchCenter（卫星发射中心）inSichuanProvince,thelastsatelliteofthethird-generationnetwork（第三代导航系统）wassentintospace.Itisthe55thmemberinthefamilyofBeiDou.ItbelongstoChinasBeidouNavigationSatelliteSystem（BDS北斗卫星导航系统）.Sofar,allthemembersofBeidou,59satellites,havebeenlaunchedintospace.WiththedevelopmentofChina,wehavealreadyownedthreeotherfamoussatellitelaunchcenters一Jiuquan,TaiyuanandWenchang.Now,thesatelliteworkswellwithotherBeidousatellitestogether.Sofar,Chinahascompletedthethird-generationnetworkofChinasBDS.Itwasanewmilestoneinthenationsspaceresearchwork.Thelaunchshowedthatourcountryhascompletedourlargestspace-basedsystem.Itsoneoffourinternationalnet-works,includingtheUnitedStatesGPS,RussiansGLONASSandtheEuropeanUnionsGalileo.BDShasbeenwidelyusedaspublicresourcesinourdailylife.Ithasbeensharedbythewholeworld.Itwillprovidemoreservicesaroundtheworld.BDSisthecommonwealthofthedevelopmentofhumanbeings.1. WheredidChinalaunchthelastsatelliteofthethird-generationnetwork?A. Xichang.B.Jiuquan.C.Wenchang.2. HowmanymembersarethereinthefamilyofBeidou?A. 5.B.55.C.59.3. Whatdoestheunderlinedword“milestone”meaninChinese?A. 起点B.里程碑C.事业GLONASSbelongsto.A.ChinaB.RussiaC.theUnitedStatesAccordingtothepassage,wecanknowthat.A. BDShasbeensharedonlybyChineseThelastsatelliteofBDSwaslaunchedat9:43p.m.,June23rd,2020B. Sofar,Chinahascompletedthethird-generationnetworkofChinasBDS【答案】1.A2.B3.B4.B5.C【解析】本文介绍了中国第三代北斗卫星导航系统的发射情况，以及中国北斗卫星导航系统的发展过程。1. 细节理解题。根据第一段第一句Atthemomentof9:43a.m.,onTuesday,June23rd,2020,attheXichangSatelliteLaunchCenter（卫星发射中心）inSichuanProvince,thelastsatelliteofthethird-generationnetwork（第三代导航系统）wassentintospace.”可知，中国第三代卫星网络的最后一颗卫星在四川省西昌卫星发射中心发射升空。故选A。2. 细节理解题。根据第一段第二句Itisthe55thmemberinthefamilyofBeiDou.可知，它是北斗大家庭的第55个成员。由此说明北斗系统有55颗卫星。故选B。3. 词义猜测题。根据下文“Thelaunchshowedthatourcounttyhascompletedourlargestspace-basedsystem.”可知，这次发射表明我国已经完成了我国最大的太空系统。由此推测此处表明这是研究太空工作的一个新的里程碑，符合语境。milestone指代里程碑。故选B。4. 细节理解题。根据第二段最后一句Ttsoneoffourinternationalnet-works,includingtheUnitedStates9GPS,RussiansGLONASSandtheEuropeanUnionsGalileo.”可知，GLONASS是俄罗斯的。故选Bo细节理解题。根据第二段第二句“Sofar,Chinahascompletedthethird-generationnetworkofChinasBDS.可知，目前，中国已建成北斗系统第三代网络。故选C。2ChinabuildsBeidouOnMay17,2019ChinalaunchedanewsatelliteattheXichangSatelliteLaunchCenter（西昌卫星发射中wastheforty-fifthBeidousatellitethatChinahadsentintospace.SowhatisBeidou?Beidouispositioningsystem（定位系统）.ItisdevelopedbyChina.Chinaisthethirdcountryintheworldtohaveitsownpositioningsystem.WithBeidou,Chinanolongerhastodependonforeignsystems.Thisisveryimportantfornationalsafety.WorkonBeidoubeganin1994.However,thefirsttwoBeidousatellites,werenotsentintospaceuntil2000.Sincethen,ChinahaslauncheddozensofBeidousatellites.Thesesatelliteshaveformedaglobalnetwork.Now,Chinaisfurtherimprovingthesystem.Itplanstolaunch（发身寸）tenmoreBeidousatellites.Ifitgoeswell,Beidouwillbecompletedbefore2020.ThecompleteBeidouwillbemorepowerfulthananyexisting（现存白勺）positioningsystemallovertheworld.YangChangfengisadesignerofBeidou.Hesaysthesystemcannoticethesway（摇摆）ofabuildinginstrongwinds.Beidouhasboughtmanyadvantagestoourlives.InShanghai,thousandsofbuseshavebeenusingBeidou.Whenwearewaitingforabus,wecanknowwhenitisabouttocome.ManysmartphoneshavealsobeenusingBeidou,Manypeoplesay,letmeturnonmyGPS.Infact,theirphonesareusingBeidou,jokesasalespersoninBeijing.5. Accordingtothearticle,howmanycountrieshaddevelopedtheirownpositioningsystemsbeforeChina?A. Two.B.Three.C.Forty-fiveD.Forty-four.6. WhendidChinasendthefirsttwoBeidousatellitesintospace?A. In1994.B.In2000.C.In2008.D.In2018.7. Whatcanwelearnfromthelastparagraph?A. Beidouisverypowerful.B.ManypeoplehavebeenusingBeidou.C.GPScanbemorepowerfulthanBeidou.D.FewsmartphoneshavebeenusingBeidou.8. Whichofthefollowingistrue?A. TheBeidousystemhasalreadybeencompletedsinceMay17,2019.B. Chinadidnthavetodependonforeignpositioningsystemsbefore.C. TheCompletedBeidousystemwillhave45satellitesinall.D. Beidouwillbethemostpowerfulpositioningsystemintheworld.【答案】6.A7.B8.B9.D【解析】本文主要讲述了北斗导航系统一一我国自行研制的卫星导航系统。该系统于1994年开始研发，到目前为止，已成为我国最优秀的卫星导航系统。这从根本上改变了我国对国外卫星导航系统的依赖。4. 细节理解题。根据第三段中的“Chinaisthethirdcountryintheworldtohaveitsownpositioningsystem.”可知，中国是世界上第三个拥有自己的定位系统的国家，也就是说在中国之前拥有定位系统的国家有两个。故选Ao细节理解题。根据第四段中的“However,thefirsttwoBeidousatellites,werenotsentintospaceuntil2000.可知，直到2000年，中国才首次将两枚“北斗”卫星发射进入太空。故选B。5. 段落大意题。根据最后一段中的Manysmartphoneshave.jokesasalespersoninBeijing.可知，人们常说的打开GPS,可能就是在使用“北斗”卫星导航的功能。故选B。6. 细节理解题。根据第四段中“Ifitgoeswell,Beidouwillbecompletedbefore2020.”可知，如果进展顺利，北斗将在2020年前建成，但是没有确切的日期，故A错误；根据第三段中“WithBeidou,Chinanolongerhastodependonforeignsystems.”可知，没有北斗之前，中国一直是依赖国外的定位系统，故B项错误；根据第四段中Ttplanstolaunch（发射）tenmoreBeidousatellites.可知，完整的北斗导航系统不止45颗卫星，故C项错误；根据第五段中ThecompleteBeidouwillbemorepowerfulthananyexisting（现存的）positioningsystemallovertheworld?9可知，完整的北斗导航系统是最好的定位系统，故选D。3Whenyouwanttogosomewhere,youcaneasilyfindyourwaybyusingamapapponyoursmartphone.Yoursmartphoneknowswhereyouareandcantellyouwheretogo.Thisispossiblewiththehelpofsatellitenavigation（satnav）systems.Asatnavsystemusesgroupsofsatellitestofindoutwherepeopleare.Itsendsinformationtoareceiver,suchasasmartphone.Themoresatellitesasystemhas,themoreaccurate（精确的）itis.OnJune23,thelastsatelliteofChinasBeidouNavigationSatelliteSystemwaslaunchedintospace.Beidou,Chinasownsatnavsystemwasfinallycompleted.Itisoneoffourglobalnavigationsystems,alongwithUSGPS,RussiasGLONASSandtheEuropeanUnionsGalileo.OnJuly31,Beidoustartedprovidingfull-scaleglobalservices.Morethan120countriesandregionsarenowusingBeidouservices.Since2000,Chinahaslaunched59Beidousatellites.Beidoucanbeusedinareasthatincludefarming,publicservicesandbusiness.Ithasapositioning（定位）accuracyofunder10meters.Thissummer,peoplealongtheYangtzeRiverusedBeidou-baseddevicetomonitorfloodwatersinreal-timewithanaccuracyofjustafewcentimeters.7. Beidouistheglobalnavigationsystem.A. firstB.secondC.thirdD.fourthWhichofthefllowingisTRUEaboutBeidou?A. ItonlyworksinChina.C.ItstartedworkingonJune23.12. Whatdoesasatnavsystemdo?A.Ithelpspeopleplantrips.C.Itletspeoplesendtextnavigate.13. Whatcanwelearnfromthepassage?A.Beidoucanbeusedinmanyareas.B. Itsnewestsatellitesaremoreaccurate.D. Itwillhavemoresatellitesinthefuture.B. Ithelpspeopleshoponline.D. Itmakespeoplesphonessmarter.B. BeidoucanmonitoreverythingonEarth.C. There9re60BeidousatellitesaboveEarthBeidouwillreplacemobilephonenetworks.【答案】10.D11.B12.C13.A【解析】本文是一篇说明文，主要讲了卫星导航系统，并着重介绍了中国的北斗卫星导航系统。9. 细节理解题。根据Itisoneoffourglobalnavigationsystems,alongwithUSGPS,RussiasGLONASSandtheEuropeanUnionsGalileo”可知，它是第四个全球导航系统，故选D。10. 推理判断题。根据最后一段的介绍Tthasapositioning（定位）accuracyofunder10meters.Thissummer,peoplealongtheYangtzeRiverusedBeidou-baseddevicetomonitorfloodwatersinreal-timewithanaccuracyofjustafewcentimeters.”可知，最新的卫星越来越精确了，故选Bo细节理解题。根据Yoursmartphoneknows”whereyouareandcantellyouwheretogo及Thisispossiblewiththehelpofsatellitenavigation（satnav）systems”可知，卫星导航系统可以帮助人们导航，故选C。11. 推理判断题。根据Beidoucanbeusedinareasthatincludefarming,publicservicesandbusiness,可知，北斗可以被用于许多领域，故选A。4Manyyearsago,peoplereliedonthesun,themoonandstarstofindtheirwayaround.Later,thecompass（指南针）wasintroduced.Andnow,wehavesatnav（卫星导航）systemstoguideus.Asatnavsystemusesgroupsofsatellitestoshowtheuserslocation.Theysendinformationtoareceiver,suchasasmartphone,toshowuswhereweare.TheearliestbuiltsatnavsystemistheGlobalPositioningSystem,whichbelongstotheUS.ThenthereisRussiasGlobalNavigation（导航）SatelliteSystem,theEuropeanUnionsGalileoandChinasownsatellitenavigationsystem,BeiDou.OnOctober14,2017,anARJ21-700plane,whichwasthefirstdomestically-producedjet（国产喷气式飞机）equippedwiththeBeiDounavigationsystem,successfullycompletedatestflight.TheresultsshowedtheperformanceofthesystemdevelopedbyChinamatchesthatofsimilarsystemsproducedaboard,accordingtotheCommercialAircraftCorporationofChina.Sinceitsintroductionin2000,theBeidounavigationsystemhasseenincreasingnumbersofapplicationslinkedtoeverydaylife,fromsharedbikestofarming.Whenitcomestosharedbikes,smartlocksthatsupportBeiDouchipsoffermoreaccuratepositioningthanothers,makingiteasiertofindabike.FarmerscanuseBeiDou-enabledtractorstoplow（犁）thesoilanduseunmannedaircraftwithBeiDoutosowseeds,whichcanimproveefficiencyandmakebetteruseofresources.BeiDousfarmingapplicationshavespreadfromHeilongjiangprovincetoBeijing,Liaoning,Shanxi,HubeiandotherregionsacrossChina.Withitsmanyuses,theBeidounavigationsystemisevenplayingabigroleintheBeltandRoadInitiative（一带一路）.“Todate,theBeiDousystemhascoveredmostpartsoftheAsia-Pacificregion（地区），aswellascountriesalongtheSilkRoadEconomicBeltandthe21stCenturyMaritimeSilkRoad”saidYangChangfeng,ChiefdesigneroftheBeiDousystem.Today,therearemorethan20BeiDousatellitesaboveourheads,andChinaplanstolaunchevenmorethisyeartoexpandtheBeiDounetworktobetterservetheBeltandRoadInitiative.AsBeiDouexpandsitsoverseasreach,itwillbeincreasinglypopularinthelogistics（物流）industry,”saidMiaoQianjun,secretary-generalofthenavigationservicesassociation.Ships,forexample,canuseittopositionthemselveswhilesailingacrossoceanstoEuropeancountries,nolongerlimitedtoSoutheastAsianregionsinthenearfuture.Whatisthepurposeofthefirsttwoparagraphs?A. Tocomparesomemodernsatnavsystems.B. Todescribethebenefitsofsatnavsystems.C. Totellushowsatnavsystemswerecreated.D. Tointroducesomesatnavsystemsandhowtheywork.12. WhatcanweknowabouttheBeiDounavigationsystemaccordingtothearticle?A. Itwasusedsuccessfullyinanewjetplane.B. Itismorepowerfulthanothersatnavsystems.C. ItwasintroducedintoChinaonOctober14,2017.D. Itwasntusedinoureverydaylifeuntilrecently.13. Accordingtothearticle,theBeiDounavigationsystemisalreadywidelyusedfor.A. plowingthesoilandsowingseedsimprovingtheefficiencyofnetworksB. producingmoresmartlocksforsharedbikesnavigatingshipsacrossoceanstoEuropeancountries14. WhatisMiaoQianjunsattitudetowardthefutureoftheBeiDousystem?A. worriedB.uncertainC.positiveD.doubtfulWheredoesthepassageprobablycomefrom?A. Agovernmentreport.B.Asciencemagazine.C. Astorybook.D.Asciencefiction.【答案】14.D15.A16.A17.C18.B【解析】这篇文章介绍了中国的卫星导航系统一一北斗卫星系统。文章介绍了北斗卫星在生活中起到的重要作用。14. 段落大意题。根据Andnow,wehavesatnav（卫星导航）systemstoguideus.现在我们有了自己的卫星导航，Asatnavsystemusesgroupsofsatellitestoshowtheuserslocation.卫星导航来展示使用者的位置，TheearliestbuiltsatnavsystemistheGlobalPositioningSystem,whichbelongstotheUS.最早的的卫星导航是属于美国GPS,ThenthereisRussiasGlobalNavigation（导航）SatelliteSystem,然后俄罗斯有了全球卫星导航，theEuropeanUnionsGalileoandChinasownsatellitenavigationsystem,BeiDou.欧洲的伽利略联盟和中国的北斗；可知前两段的主要目的是介绍一些卫星导航系统和他们的功能；故选D。15. 细节理解题。根据OnOctober14,2017,anARJ21-700plane,whichwasthefirstdomestically-producedjet（国产喷气式飞机）equippedwiththeBeiDounavigationsystem,successfullycompletedatestflight在2017年十月14日，国产第一个装有北斗卫星导航的喷气式飞机ARJ21-700成功完成了试飞；故选A。16. 细节理解题。根据FarmerscanuseBeiDou-enabledtractorstoplow（犁）thesoilanduseunmannedaircraftwithBeiDoutosowseeds农民能使用北斗导航拖拉机犁地，用带有北斗导航的无人机播种；故选A。17. 观点态度题。根据itwillbeincreasinglypopularinthelogistics（物流）industry它会在物流产业也来越受欢迎，Ships,forexample,canuseittopositionthemselveswhilesailingacrossoceanstoEuropeancountries,nolongerlimitedtoSoutheastAsianregionsinthenearfuture.在不久的将来轮船穿越海洋到欧洲国家时，能确定自己的位置，不再限制于东南亚地区；可推测他对北斗系统的前景非常乐观；故选C。18. 推理判断题。根据文章介绍了中国的卫星导航系统北斗卫星系统，可推测文章可能来自一本科学杂志；Agovernmentreport一个政府报告；Asciencemagazine一本科学杂志；Astorybook一本故事书；Asciencefiction一本科幻小说；故选Bo5Howdopeoplefindtheirways?Atfirst,peoplediditbylookingatthesun,themoonandstars.Later,westartedtousethecompass旨南针）.Today,therearenavigationsatellitesystems（卫星导航系统）.Anavigationsatellitesystemusesgroupsofsatellites（卫星），theysendinformationtoareceiver,suchasyoursmartphone.Thentheycanfindwhereyouare.TheearliestnavigationsystemistheGlobalPositioningSystem（GPS）（全球定位系统）oftheUnitedStates.TheUShasput24satellitesintospacetomakesureGPScanlocateapersoncorrectlyandglobally.RussiasGLONASSandEuropeanUnion*sGalileocanalsoworkglobally.TheBeiDouNavigationSatelliteSystem（BDS）isChinashomegrownnavigationsystem.Itwassetupin2000.OnJune23rd2020,thelastsatelliteofChinasBeidouNavigationSatellitesystemwassentintospace.Beidou,Chinasownnavigationsystem,wasfinallycompleted.OnJuly31,Beidoustartedprovidingfull-scaleglobalservices（全面的全球服务）.Morethan120countriesandregions（地区）arenowusingBeidouservices.Since2000,Chinahassent55Beidousatellites.BeiDoucanfindyouwhereveryouare.Ithelpsyougofasterbyfindingshortcutsandusingcorrectdirections.Whenyouareintroubleandcallthepolice,theywillknowexactlywhereyouareifyouhaveasmartphonethatusesBeiDou.BeiDoualsohasauniquemessagingability.Itallowspeopletosendtextmessagesupto1,200Chinesewordswhenmobilephoneservicesareinterrupted（中断）becauseofsomereasons.19. Howdidpeoplefindtheirwaysatfirstaccordingtothispassage?A. Bylookingatthesun,themoonandstars.B. Byusingthenavigationsatellitesystems.C. Bylookingatthecompass.20. Whatdoesanavigationsystemsdo?A. Ithelpspeopleplantrips.B. Ithelpspeoplefindwheretheyare.C. ItletspeoplesendtextmessagesHowmanynavigationsatellitesystemsarementionedinthepassage?A.TwoB.ThreeC.FourWhatdoestheunderlinedwordlocateinthethirdparagraphmean?A.位于B.设置C.定位WhatdoyouknowabouttheBeiDousystem?A.ItwassetupbeforeGPS.B. BeiDousystemswerecompletedinJune.C. OnlyChinacanuseBeiDousystemservices.【答案】19.A20.B21.C22.C23.B【解析】本文介绍了卫星导航系统的发展进程以及中国自主研发的导航系统一一北斗卫星导航系统。15. 细节理解题。根据Atfirst,peoplediditbylookingatthesun,themoonandstars,可知，起初人们通过看太阳，月亮和星星寻找方向，故选A。16. 细节理解题。根据Thentheycanfindwhereyouare99,可知，卫星导航系统帮助人们找到他们在哪里，故选Bo细节理解题。根据“TheearliestnavigationsystemistheGlobalPositioningSystem(GPS)(全球定位系统)oftheUnitedStatesRussiasGLONASSandEuropeanUnion*sGalileocanalsoworkglobally,及TheBeiDouNavigationSatelliteSystem(BDS)isChina%homegrownnavigationsystem,可知，本文共提到了四个卫星定位系统,故选C。17. 词义猜测题。根据“TheUShasput24satellitesintospacetomakesureGPScanlocateapersoncorrectlyandglobal!/可知，美国向太空发射了24颗卫星，以确保全球定位系统能够在全球范围内准确定位一个人，所以locate表示“定位”，故选Co细节理解题。根据OnJune23rd2020,thelastsatelliteofChinasBeidouNavigationSatellitesystemwassentintospace.Beidou,Chinasownnavigationsystems,wasfinallycomplete,可矢口，2020年6月北斗卫星定位系统最终完成，故选B。6ThelaunchofBeiDouNavigationSatelliteSystem(北斗卫星导航系统)onJune23rd2020marksthecompletionofChinasself-developedandoperatedBeiDounetwork,oneofthefourglobalnavigationnetworks,alongwiththeUSAsGPS,RussiasGLONASSandtheEuropeanUnionsGalileo.ItalsomarkstheendofthecountrysdependenceonAmericaforanimportantservice:locationdata.GPSwastheearliestnetworktoprovidegloballocationdata.ThesystemisownedbyAmericasgovernment,whichmeansAmericanofficialscoulddecidetoturnoffordowngradethesignalscomingfromGPSsatellites.ThemainpurposeofbuildingBDSistogiveChinafullcontroloveranavigationsystem.WorkonBDSbeganinthe1990sandincludedthreephases.ThefirstphasewasaboutbuildingtheBeiDou-1system,whichstartedin1994andin2000providedpositioning,shortmessagetelecommunicationandtimingservicesinChina.Thesecondphase-theBeiDou-2system,whichstartedin2004,wascompletedin2012.TheChinabuildsBeidouOnMay17,2019ChinalaunchedanewsatelliteattheXichangSatelliteLaunchCenter（西昌卫星发射中心、）.Itwastheforty-fifthBeidousatellitethatChinahadsentintospace.SowhatisBeidou?Beidouispositioningsystem（定位系统）.ItisdevelopedbyChina.Chinaisthethirdcountryintheworldtohaveitsownpositioningsystem.WithBeidou,Chinanolongerhastodependonforeignsystems.Thisisveryimportantfornationalsafety.WorkonBeidoubeganin1994.However,thefirsttwoBeidousatellites,werenotsentintospaceuntil2000.Sincethen,ChinahaslauncheddozensofBeidousatellites.Thesesatelliteshaveformedaglobalnetwork.Now,Chinaisfurtherimprovingthesystem.Itplanstolaunch（发射）tenmoreBeidousatellites.Ifitgoeswell,Beidouwillbecompletedbefore2020.ThecompleteBeidouwillbemorepowerfulthananyexisting（现存白勺）positioningsystemallovertheworld.YangChangfengisadesignerofBeidou.Hesaysthesystemcannoticethesway（摇摆）ofabuildinginstrongwinds.Beidouhasboughtmanyadvantagestoourlives.InShanghai,thousandsofbuseshavebeenusingBeidou.Whenwearewaitingforabus,wecanknowwhenitisabouttocome.ManysmartphoneshavealsobeenusingBeidou,“Manypeoplesay,letmeturnonmyGPS.Infact,theirphonesareusingBeidou,jokesasalespersoninBeijing.4. Accordingtothearticle,howmanycountrieshaddevelopedtheirownpositioningsystemsbeforeChina?A.Two.B.Three.C.Forty-fiveD.Forty-four.5. WhendidChinasendthefirsttwoBeidousatellitesintospace?A.In1994.B.In2000.C.In2008.D.In2018.6. Whatcanwelearnfromthelastparagraph?A.Beidouisverypowerful.B.ManypeoplehavebeenusingBeidou.C. GPScanbemorepowerfulthanBeidou.D.FewsmartphoneshavebeenusingBeidou.7. Whichofthefollowingistrue?A. TheBeidousystemhasalreadybeencompletedsinceMay17,2019.B. Chinadidnthavetodependonforeignpositioningsystemsbefore.BeiDou-2groundsystemnotonlyservesChinabutalsoprovidesusersintheAsia-Pacificregionwithmorethantensatellitesandofferedservicesabove.ThethirdphaseinvolvedthedevelopmentoftheBeiDou-3system,whichstartedin2009andwascompletedinJune,2020.AsoneoftheIGEmembers,ChinaisalwayscooperatingwithforeigncountriesanduseBDStoserveglobaluserswithhighperformanceandhighqualityinscientificresearch.BeiDoussatellitesaremoreadvancedthanthoseofGPS.IntheAsia-Pacificregion,BeiDouclaimsa10-cmaccuracy,comparedwith30cmpositioningwithoutdoingwrongofferedbyGPS.Americabeganupgradingitssystemin1997butitmaytakeanother15yearstofinishtheproject.18. Whichofthefollowingnameisdifferentfromtheotherthreeaccordingtothepassage?A.BDS.B.GPS.C.Galileo.D.Russia.19. WhafstheimportanceofthesuccessfullaunchofBDS?A. ItmeansBDSwillbetheearliestnetworktoprovidegloballocationdata.B. ItmeansBDSwillbethefourthnetworktoprovidegloballocationdata.C. ItmeansChinacanfullytakechargeofaglobalnavigationsatellitesystem.D. ItmeanswecanstopAmericanofficialsfromturningoffthesatellitessignals.20. WhatdoesParagraph3mainlytalkabout?A.IttalksaboutthreephasesofworkonBDS.