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1、2023年中考英語時事熱點閱讀專練熱點13中國北斗衛(wèi)星導航系統(tǒng)一、閱讀理解1Atthemomentof9:43a.m.,onTuesday,June23rd,2020,attheXichangSatelliteLaunchCenter（衛(wèi)星發(fā)射中心）inSichuanProvince,thelastsatelliteofthethird-generationnetwork（第三代導航系統(tǒng)）wassentintospace.Itisthe55thmemberinthefamilyofBeiDou.ItbelongstoChinasBeidouNavigationSatelliteSystem（B

2、DS北斗衛(wèi)星導航系統(tǒng)）.Sofar,allthemembersofBeidou,59satellites,havebeenlaunchedintospace.WiththedevelopmentofChina,wehavealreadyownedthreeotherfamoussatellitelaunchcenters一Jiuquan,TaiyuanandWenchang.Now,thesatelliteworkswellwithotherBeidousatellitestogether.Sofar,Chinahascompletedthethird-generationnetworkofC

3、hinasBDS.Itwasanewmilestoneinthenationsspaceresearchwork.Thelaunchshowedthatourcountryhascompletedourlargestspace-basedsystem.Itsoneoffourinternationalnet-works,includingtheUnitedStatesGPS,RussiansGLONASSandtheEuropeanUnionsGalileo.BDShasbeenwidelyusedaspublicresourcesinourdailylife.Ithasbeensharedb

4、ythewholeworld.Itwillprovidemoreservicesaroundtheworld.BDSisthecommonwealthofthedevelopmentofhumanbeings.1. WheredidChinalaunchthelastsatelliteofthethird-generationnetwork?A. Xichang.B.Jiuquan.C.Wenchang.2. HowmanymembersarethereinthefamilyofBeidou?A. 5.B.55.C.59.3. Whatdoestheunderlinedword“milesto

5、ne”meaninChinese?A. 起點B.里程碑C.事業(yè)GLONASSbelongsto.A.ChinaB.RussiaC.theUnitedStatesAccordingtothepassage,wecanknowthat.A. BDShasbeensharedonlybyChineseThelastsatelliteofBDSwaslaunchedat9:43p.m.,June23rd,2020B. Sofar,Chinahascompletedthethird-generationnetworkofChinasBDStowithinafewmeters,BDSreducesthee

6、rrortocentimeters.Thishigh-precisionserviceis52.(use)forlandsurveying,mapping,agricultureandautomateddriving.ChinaiswillingtoshareBDSwiththeworld.AccordingtoRan,BDSproductshavebeenexportedtomorethan120countriesandregions.TheBeidousystemwillalwaysadheretothedevelopmentconceptofChinasBeidou,theworldsB

7、eidou,andthefirst-classBeidou,servingtheworldandbenefitingmankind,”Rantoldreportersafterthelatestlaunch.Headdedthatfutureplanscallforasmarterand53.(accessible)systemwithBeidouatitscore,tocomeonlineby2035.Bythen,wecanprobablysaythatRomehasfinallybeenbuilt.2023年中考英語時事熱點閱讀專練熱點13中國北斗衛(wèi)星導航系統(tǒng)一、閱讀理解1Atthemo

8、mentof9:43a.m.,onTuesday,June23rd,2020,attheXichangSatelliteLaunchCenter（衛(wèi)星發(fā)射中心）inSichuanProvince,thelastsatelliteofthethird-generationnetwork（第三代導航系統(tǒng)）wassentintospace.Itisthe55thmemberinthefamilyofBeiDou.ItbelongstoChinasBeidouNavigationSatelliteSystem（BDS北斗衛(wèi)星導航系統(tǒng)）.Sofar,allthemembersofBeidou,59sat

9、ellites,havebeenlaunchedintospace.WiththedevelopmentofChina,wehavealreadyownedthreeotherfamoussatellitelaunchcenters一Jiuquan,TaiyuanandWenchang.Now,thesatelliteworkswellwithotherBeidousatellitestogether.Sofar,Chinahascompletedthethird-generationnetworkofChinasBDS.Itwasanewmilestoneinthenationsspacer

10、esearchwork.Thelaunchshowedthatourcountryhascompletedourlargestspace-basedsystem.Itsoneoffourinternationalnet-works,includingtheUnitedStatesGPS,RussiansGLONASSandtheEuropeanUnionsGalileo.BDShasbeenwidelyusedaspublicresourcesinourdailylife.Ithasbeensharedbythewholeworld.Itwillprovidemoreservicesaroun

11、dtheworld.BDSisthecommonwealthofthedevelopmentofhumanbeings.1. WheredidChinalaunchthelastsatelliteofthethird-generationnetwork?A. Xichang.B.Jiuquan.C.Wenchang.2. HowmanymembersarethereinthefamilyofBeidou?A. 5.B.55.C.59.3. Whatdoestheunderlinedword“milestone”meaninChinese?A. 起點B.里程碑C.事業(yè)GLONASSbelongs

12、to.A.ChinaB.RussiaC.theUnitedStatesAccordingtothepassage,wecanknowthat.A. BDShasbeensharedonlybyChineseThelastsatelliteofBDSwaslaunchedat9:43p.m.,June23rd,2020B. Sofar,Chinahascompletedthethird-generationnetworkofChinasBDS【答案】1.A2.B3.B4.B5.C【解析】本文介紹了中國第三代北斗衛(wèi)星導航系統(tǒng)的發(fā)射情況，以及中國北斗衛(wèi)星導航系統(tǒng)的發(fā)展過程。1. 細節(jié)理解題。根據(jù)第一

13、段第一句Atthemomentof9:43a.m.,onTuesday,June23rd,2020,attheXichangSatelliteLaunchCenter（衛(wèi)星發(fā)射中心）inSichuanProvince,thelastsatelliteofthethird-generationnetwork（第三代導航系統(tǒng)）wassentintospace.”可知，中國第三代衛(wèi)星網(wǎng)絡(luò)的最后一顆衛(wèi)星在四川省西昌衛(wèi)星發(fā)射中心發(fā)射升空。故選A。2. 細節(jié)理解題。根據(jù)第一段第二句Itisthe55thmemberinthefamilyofBeiDou.可知，它是北斗大家庭的第55個成員。由此說明北斗系統(tǒng)

14、有55顆衛(wèi)星。故選B。3. 詞義猜測題。根據(jù)下文“Thelaunchshowedthatourcounttyhascompletedourlargestspace-basedsystem.”可知，這次發(fā)射表明我國已經(jīng)完成了我國最大的太空系統(tǒng)。由此推測此處表明這是研究太空工作的一個新的里程碑，符合語境。milestone指代里程碑。故選B。4. 細節(jié)理解題。根據(jù)第二段最后一句Ttsoneoffourinternationalnet-works,includingtheUnitedStates9GPS,RussiansGLONASSandtheEuropeanUnionsGalileo.”可知，G

15、LONASS是俄羅斯的。故選Bo細節(jié)理解題。根據(jù)第二段第二句“Sofar,Chinahascompletedthethird-generationnetworkofChinasBDS.可知，目前，中國已建成北斗系統(tǒng)第三代網(wǎng)絡(luò)。故選C。2ChinabuildsBeidouOnMay17,2019ChinalaunchedanewsatelliteattheXichangSatelliteLaunchCenter（西昌衛(wèi)星發(fā)射中wastheforty-fifthBeidousatellitethatChinahadsentintospace.SowhatisBeidou?Beidouisposit

16、ioningsystem（定位系統(tǒng)）.ItisdevelopedbyChina.Chinaisthethirdcountryintheworldtohaveitsownpositioningsystem.WithBeidou,Chinanolongerhastodependonforeignsystems.Thisisveryimportantfornationalsafety.WorkonBeidoubeganin1994.However,thefirsttwoBeidousatellites,werenotsentintospaceuntil2000.Sincethen,Chinahasl

17、auncheddozensofBeidousatellites.Thesesatelliteshaveformedaglobalnetwork.Now,Chinaisfurtherimprovingthesystem.Itplanstolaunch（發(fā)身寸）tenmoreBeidousatellites.Ifitgoeswell,Beidouwillbecompletedbefore2020.ThecompleteBeidouwillbemorepowerfulthananyexisting（現(xiàn)存白勺）positioningsystemallovertheworld.YangChangfeng

18、isadesignerofBeidou.Hesaysthesystemcannoticethesway（搖擺）ofabuildinginstrongwinds.Beidouhasboughtmanyadvantagestoourlives.InShanghai,thousandsofbuseshavebeenusingBeidou.Whenwearewaitingforabus,wecanknowwhenitisabouttocome.ManysmartphoneshavealsobeenusingBeidou,Manypeoplesay,letmeturnonmyGPS.Infact,the

19、irphonesareusingBeidou,jokesasalespersoninBeijing.5. Accordingtothearticle,howmanycountrieshaddevelopedtheirownpositioningsystemsbeforeChina?A. Two.B.Three.C.Forty-fiveD.Forty-four.6. WhendidChinasendthefirsttwoBeidousatellitesintospace?A. In1994.B.In2000.C.In2008.D.In2018.7. Whatcanwelearnfromthela

20、stparagraph?A. Beidouisverypowerful.B.ManypeoplehavebeenusingBeidou.C.GPScanbemorepowerfulthanBeidou.D.FewsmartphoneshavebeenusingBeidou.8. Whichofthefollowingistrue?A. TheBeidousystemhasalreadybeencompletedsinceMay17,2019.B. Chinadidnthavetodependonforeignpositioningsystemsbefore.C. TheCompletedBei

21、dousystemwillhave45satellitesinall.D. Beidouwillbethemostpowerfulpositioningsystemintheworld.【答案】6.A7.B8.B9.D【解析】本文主要講述了北斗導航系統(tǒng)一一我國自行研制的衛(wèi)星導航系統(tǒng)。該系統(tǒng)于1994年開始研發(fā)，到目前為止，已成為我國最優(yōu)秀的衛(wèi)星導航系統(tǒng)。這從根本上改變了我國對國外衛(wèi)星導航系統(tǒng)的依賴。4. 細節(jié)理解題。根據(jù)第三段中的“Chinaisthethirdcountryintheworldtohaveitsownpositioningsystem.”可知，中國是世界上第三個擁有自己的定位

22、系統(tǒng)的國家，也就是說在中國之前擁有定位系統(tǒng)的國家有兩個。故選Ao細節(jié)理解題。根據(jù)第四段中的“However,thefirsttwoBeidousatellites,werenotsentintospaceuntil2000.可知，直到2000年，中國才首次將兩枚“北斗”衛(wèi)星發(fā)射進入太空。故選B。5. 段落大意題。根據(jù)最后一段中的Manysmartphoneshave.jokesasalespersoninBeijing.可知，人們常說的打開GPS,可能就是在使用“北斗”衛(wèi)星導航的功能。故選B。6. 細節(jié)理解題。根據(jù)第四段中“Ifitgoeswell,Beidouwillbecompletedb

23、efore2020.”可知，如果進展順利，北斗將在2020年前建成，但是沒有確切的日期，故A錯誤；根據(jù)第三段中“WithBeidou,Chinanolongerhastodependonforeignsystems.”可知，沒有北斗之前，中國一直是依賴國外的定位系統(tǒng)，故B項錯誤；根據(jù)第四段中Ttplanstolaunch（發(fā)射）tenmoreBeidousatellites.可知，完整的北斗導航系統(tǒng)不止45顆衛(wèi)星，故C項錯誤；根據(jù)第五段中ThecompleteBeidouwillbemorepowerfulthananyexisting（現(xiàn)存的）positioningsystemallover

24、theworld?9可知，完整的北斗導航系統(tǒng)是最好的定位系統(tǒng)，故選D。3Whenyouwanttogosomewhere,youcaneasilyfindyourwaybyusingamapapponyoursmartphone.Yoursmartphoneknowswhereyouareandcantellyouwheretogo.Thisispossiblewiththehelpofsatellitenavigation（satnav）systems.Asatnavsystemusesgroupsofsatellitestofindoutwherepeopleare.Itsendsinfo

25、rmationtoareceiver,suchasasmartphone.Themoresatellitesasystemhas,themoreaccurate（精確的）itis.OnJune23,thelastsatelliteofChinasBeidouNavigationSatelliteSystemwaslaunchedintospace.Beidou,Chinasownsatnavsystemwasfinallycompleted.Itisoneoffourglobalnavigationsystems,alongwithUSGPS,RussiasGLONASSandtheEurop

26、eanUnionsGalileo.OnJuly31,Beidoustartedprovidingfull-scaleglobalservices.Morethan120countriesandregionsarenowusingBeidouservices.Since2000,Chinahaslaunched59Beidousatellites.Beidoucanbeusedinareasthatincludefarming,publicservicesandbusiness.Ithasapositioning（定位）accuracyofunder10meters.Thissummer,peo

27、plealongtheYangtzeRiverusedBeidou-baseddevicetomonitorfloodwatersinreal-timewithanaccuracyofjustafewcentimeters.7. Beidouistheglobalnavigationsystem.A. firstB.secondC.thirdD.fourthWhichofthefllowingisTRUEaboutBeidou?A. ItonlyworksinChina.C.ItstartedworkingonJune23.12. Whatdoesasatnavsystemdo?A.Ithel

28、pspeopleplantrips.C.Itletspeoplesendtextnavigate.13. Whatcanwelearnfromthepassage?A.Beidoucanbeusedinmanyareas.B. Itsnewestsatellitesaremoreaccurate.D. Itwillhavemoresatellitesinthefuture.B. Ithelpspeopleshoponline.D. Itmakespeoplesphonessmarter.B. BeidoucanmonitoreverythingonEarth.C. There9re60Beid

29、ousatellitesaboveEarthBeidouwillreplacemobilephonenetworks.【答案】10.D11.B12.C13.A【解析】本文是一篇說明文，主要講了衛(wèi)星導航系統(tǒng)，并著重介紹了中國的北斗衛(wèi)星導航系統(tǒng)。9. 細節(jié)理解題。根據(jù)Itisoneoffourglobalnavigationsystems,alongwithUSGPS,RussiasGLONASSandtheEuropeanUnionsGalileo”可知，它是第四個全球?qū)Ш较到y(tǒng)，故選D。10. 推理判斷題。根據(jù)最后一段的介紹Tthasapositioning（定位）accuracyofunder

30、10meters.Thissummer,peoplealongtheYangtzeRiverusedBeidou-baseddevicetomonitorfloodwatersinreal-timewithanaccuracyofjustafewcentimeters.”可知，最新的衛(wèi)星越來越精確了，故選Bo細節(jié)理解題。根據(jù)Yoursmartphoneknows”whereyouareandcantellyouwheretogo及Thisispossiblewiththehelpofsatellitenavigation（satnav）systems”可知，衛(wèi)星導航系統(tǒng)可以幫助人們導航，故選C

31、。11. 推理判斷題。根據(jù)Beidoucanbeusedinareasthatincludefarming,publicservicesandbusiness,可知，北斗可以被用于許多領(lǐng)域，故選A。4Manyyearsago,peoplereliedonthesun,themoonandstarstofindtheirwayaround.Later,thecompass（指南針）wasintroduced.Andnow,wehavesatnav（衛(wèi)星導航）systemstoguideus.Asatnavsystemusesgroupsofsatellitestoshowtheusersloca

32、tion.Theysendinformationtoareceiver,suchasasmartphone,toshowuswhereweare.TheearliestbuiltsatnavsystemistheGlobalPositioningSystem,whichbelongstotheUS.ThenthereisRussiasGlobalNavigation（導航）SatelliteSystem,theEuropeanUnionsGalileoandChinasownsatellitenavigationsystem,BeiDou.OnOctober14,2017,anARJ21-70

33、0plane,whichwasthefirstdomestically-producedjet（國產(chǎn)噴氣式飛機）equippedwiththeBeiDounavigationsystem,successfullycompletedatestflight.TheresultsshowedtheperformanceofthesystemdevelopedbyChinamatchesthatofsimilarsystemsproducedaboard,accordingtotheCommercialAircraftCorporationofChina.Sinceitsintroductionin2

34、000,theBeidounavigationsystemhasseenincreasingnumbersofapplicationslinkedtoeverydaylife,fromsharedbikestofarming.Whenitcomestosharedbikes,smartlocksthatsupportBeiDouchipsoffermoreaccuratepositioningthanothers,makingiteasiertofindabike.FarmerscanuseBeiDou-enabledtractorstoplow（犁）thesoilanduseunmanned

35、aircraftwithBeiDoutosowseeds,whichcanimproveefficiencyandmakebetteruseofresources.BeiDousfarmingapplicationshavespreadfromHeilongjiangprovincetoBeijing,Liaoning,Shanxi,HubeiandotherregionsacrossChina.Withitsmanyuses,theBeidounavigationsystemisevenplayingabigroleintheBeltandRoadInitiative（一帶一路）.“Toda

36、te,theBeiDousystemhascoveredmostpartsoftheAsia-Pacificregion（地區(qū)），aswellascountriesalongtheSilkRoadEconomicBeltandthe21stCenturyMaritimeSilkRoad”saidYangChangfeng,ChiefdesigneroftheBeiDousystem.Today,therearemorethan20BeiDousatellitesaboveourheads,andChinaplanstolaunchevenmorethisyeartoexpandtheBeiDo

37、unetworktobetterservetheBeltandRoadInitiative.AsBeiDouexpandsitsoverseasreach,itwillbeincreasinglypopularinthelogistics（物流）industry,”saidMiaoQianjun,secretary-generalofthenavigationservicesassociation.Ships,forexample,canuseittopositionthemselveswhilesailingacrossoceanstoEuropeancountries,nolongerli

38、mitedtoSoutheastAsianregionsinthenearfuture.Whatisthepurposeofthefirsttwoparagraphs?A. Tocomparesomemodernsatnavsystems.B. Todescribethebenefitsofsatnavsystems.C. Totellushowsatnavsystemswerecreated.D. Tointroducesomesatnavsystemsandhowtheywork.12. WhatcanweknowabouttheBeiDounavigationsystemaccordin

39、gtothearticle?A. Itwasusedsuccessfullyinanewjetplane.B. Itismorepowerfulthanothersatnavsystems.C. ItwasintroducedintoChinaonOctober14,2017.D. Itwasntusedinoureverydaylifeuntilrecently.13. Accordingtothearticle,theBeiDounavigationsystemisalreadywidelyusedfor.A. plowingthesoilandsowingseedsimprovingth

40、eefficiencyofnetworksB. producingmoresmartlocksforsharedbikesnavigatingshipsacrossoceanstoEuropeancountries14. WhatisMiaoQianjunsattitudetowardthefutureoftheBeiDousystem?A. worriedB.uncertainC.positiveD.doubtfulWheredoesthepassageprobablycomefrom?A. Agovernmentreport.B.Asciencemagazine.C. Astorybook

41、.D.Asciencefiction.【答案】14.D15.A16.A17.C18.B【解析】這篇文章介紹了中國的衛(wèi)星導航系統(tǒng)一一北斗衛(wèi)星系統(tǒng)。文章介紹了北斗衛(wèi)星在生活中起到的重要作用。14. 段落大意題。根據(jù)Andnow,wehavesatnav（衛(wèi)星導航）systemstoguideus.現(xiàn)在我們有了自己的衛(wèi)星導航，Asatnavsystemusesgroupsofsatellitestoshowtheuserslocation.衛(wèi)星導航來展示使用者的位置，TheearliestbuiltsatnavsystemistheGlobalPositioningSystem,whichbelon

42、gstotheUS.最早的的衛(wèi)星導航是屬于美國GPS,ThenthereisRussiasGlobalNavigation（導航）SatelliteSystem,然后俄羅斯有了全球衛(wèi)星導航，theEuropeanUnionsGalileoandChinasownsatellitenavigationsystem,BeiDou.歐洲的伽利略聯(lián)盟和中國的北斗；可知前兩段的主要目的是介紹一些衛(wèi)星導航系統(tǒng)和他們的功能；故選D。15. 細節(jié)理解題。根據(jù)OnOctober14,2017,anARJ21-700plane,whichwasthefirstdomestically-producedjet（國產(chǎn)

43、噴氣式飛機）equippedwiththeBeiDounavigationsystem,successfullycompletedatestflight在2017年十月14日，國產(chǎn)第一個裝有北斗衛(wèi)星導航的噴氣式飛機ARJ21-700成功完成了試飛；故選A。16. 細節(jié)理解題。根據(jù)FarmerscanuseBeiDou-enabledtractorstoplow（犁）thesoilanduseunmannedaircraftwithBeiDoutosowseeds農(nóng)民能使用北斗導航拖拉機犁地，用帶有北斗導航的無人機播種；故選A。17. 觀點態(tài)度題。根據(jù)itwillbeincreasinglypo

44、pularinthelogistics（物流）industry它會在物流產(chǎn)業(yè)也來越受歡迎，Ships,forexample,canuseittopositionthemselveswhilesailingacrossoceanstoEuropeancountries,nolongerlimitedtoSoutheastAsianregionsinthenearfuture.在不久的將來輪船穿越海洋到歐洲國家時，能確定自己的位置，不再限制于東南亞地區(qū)；可推測他對北斗系統(tǒng)的前景非常樂觀；故選C。18. 推理判斷題。根據(jù)文章介紹了中國的衛(wèi)星導航系統(tǒng)北斗衛(wèi)星系統(tǒng)，可推測文章可能來自一本科學雜志；Ago

45、vernmentreport一個政府報告；Asciencemagazine一本科學雜志；Astorybook一本故事書；Asciencefiction一本科幻小說；故選Bo5Howdopeoplefindtheirways?Atfirst,peoplediditbylookingatthesun,themoonandstars.Later,westartedtousethecompass旨南針）.Today,therearenavigationsatellitesystems（衛(wèi)星導航系統(tǒng)）.Anavigationsatellitesystemusesgroupsofsatellites（衛(wèi)星

46、），theysendinformationtoareceiver,suchasyoursmartphone.Thentheycanfindwhereyouare.TheearliestnavigationsystemistheGlobalPositioningSystem（GPS）（全球定位系統(tǒng)）oftheUnitedStates.TheUShasput24satellitesintospacetomakesureGPScanlocateapersoncorrectlyandglobally.RussiasGLONASSandEuropeanUnion*sGalileocanalsoworkg

47、lobally.TheBeiDouNavigationSatelliteSystem（BDS）isChinashomegrownnavigationsystem.Itwassetupin2000.OnJune23rd2020,thelastsatelliteofChinasBeidouNavigationSatellitesystemwassentintospace.Beidou,Chinasownnavigationsystem,wasfinallycompleted.OnJuly31,Beidoustartedprovidingfull-scaleglobalservices（全面的全球服

48、務(wù)）.Morethan120countriesandregions（地區(qū)）arenowusingBeidouservices.Since2000,Chinahassent55Beidousatellites.BeiDoucanfindyouwhereveryouare.Ithelpsyougofasterbyfindingshortcutsandusingcorrectdirections.Whenyouareintroubleandcallthepolice,theywillknowexactlywhereyouareifyouhaveasmartphonethatusesBeiDou.Be

49、iDoualsohasauniquemessagingability.Itallowspeopletosendtextmessagesupto1,200Chinesewordswhenmobilephoneservicesareinterrupted（中斷）becauseofsomereasons.19. Howdidpeoplefindtheirwaysatfirstaccordingtothispassage?A. Bylookingatthesun,themoonandstars.B. Byusingthenavigationsatellitesystems.C. Bylookingat

50、thecompass.20. Whatdoesanavigationsystemsdo?A. Ithelpspeopleplantrips.B. Ithelpspeoplefindwheretheyare.C. ItletspeoplesendtextmessagesHowmanynavigationsatellitesystemsarementionedinthepassage?A.TwoB.ThreeC.FourWhatdoestheunderlinedwordlocateinthethirdparagraphmean?A.位于B.設(shè)置C.定位WhatdoyouknowabouttheBe

51、iDousystem?A.ItwassetupbeforeGPS.B. BeiDousystemswerecompletedinJune.C. OnlyChinacanuseBeiDousystemservices.【答案】19.A20.B21.C22.C23.B【解析】本文介紹了衛(wèi)星導航系統(tǒng)的發(fā)展進程以及中國自主研發(fā)的導航系統(tǒng)一一北斗衛(wèi)星導航系統(tǒng)。15. 細節(jié)理解題。根據(jù)Atfirst,peoplediditbylookingatthesun,themoonandstars,可知，起初人們通過看太陽，月亮和星星尋找方向，故選A。16. 細節(jié)理解題。根據(jù)Thentheycanfindwhere

52、youare99,可知，衛(wèi)星導航系統(tǒng)幫助人們找到他們在哪里，故選Bo細節(jié)理解題。根據(jù)“TheearliestnavigationsystemistheGlobalPositioningSystem(GPS)(全球定位系統(tǒng))oftheUnitedStatesRussiasGLONASSandEuropeanUnion*sGalileocanalsoworkglobally,及TheBeiDouNavigationSatelliteSystem(BDS)isChina%homegrownnavigationsystem,可知，本文共提到了四個衛(wèi)星定位系統(tǒng),故選C。17. 詞義猜測題。根據(jù)“TheU

53、Shasput24satellitesintospacetomakesureGPScanlocateapersoncorrectlyandglobal!/可知，美國向太空發(fā)射了24顆衛(wèi)星，以確保全球定位系統(tǒng)能夠在全球范圍內(nèi)準確定位一個人，所以locate表示“定位”，故選Co細節(jié)理解題。根據(jù)OnJune23rd2020,thelastsatelliteofChinasBeidouNavigationSatellitesystemwassentintospace.Beidou,Chinasownnavigationsystems,wasfinallycomplete,可矢口，2020年6月北斗衛(wèi)

54、星定位系統(tǒng)最終完成，故選B。6ThelaunchofBeiDouNavigationSatelliteSystem(北斗衛(wèi)星導航系統(tǒng))onJune23rd2020marksthecompletionofChinasself-developedandoperatedBeiDounetwork,oneofthefourglobalnavigationnetworks,alongwiththeUSAsGPS,RussiasGLONASSandtheEuropeanUnionsGalileo.ItalsomarkstheendofthecountrysdependenceonAmericaforani

55、mportantservice:locationdata.GPSwastheearliestnetworktoprovidegloballocationdata.ThesystemisownedbyAmericasgovernment,whichmeansAmericanofficialscoulddecidetoturnoffordowngradethesignalscomingfromGPSsatellites.ThemainpurposeofbuildingBDSistogiveChinafullcontroloveranavigationsystem.WorkonBDSbeganint

56、he1990sandincludedthreephases.ThefirstphasewasaboutbuildingtheBeiDou-1system,whichstartedin1994andin2000providedpositioning,shortmessagetelecommunicationandtimingservicesinChina.Thesecondphase-theBeiDou-2system,whichstartedin2004,wascompletedin2012.TheChinabuildsBeidouOnMay17,2019Chinalaunchedanewsa

57、telliteattheXichangSatelliteLaunchCenter（西昌衛(wèi)星發(fā)射中心、）.Itwastheforty-fifthBeidousatellitethatChinahadsentintospace.SowhatisBeidou?Beidouispositioningsystem（定位系統(tǒng)）.ItisdevelopedbyChina.Chinaisthethirdcountryintheworldtohaveitsownpositioningsystem.WithBeidou,Chinanolongerhastodependonforeignsystems.Thisis

58、veryimportantfornationalsafety.WorkonBeidoubeganin1994.However,thefirsttwoBeidousatellites,werenotsentintospaceuntil2000.Sincethen,ChinahaslauncheddozensofBeidousatellites.Thesesatelliteshaveformedaglobalnetwork.Now,Chinaisfurtherimprovingthesystem.Itplanstolaunch（發(fā)射）tenmoreBeidousatellites.Ifitgoes

59、well,Beidouwillbecompletedbefore2020.ThecompleteBeidouwillbemorepowerfulthananyexisting（現(xiàn)存白勺）positioningsystemallovertheworld.YangChangfengisadesignerofBeidou.Hesaysthesystemcannoticethesway（搖擺）ofabuildinginstrongwinds.Beidouhasboughtmanyadvantagestoourlives.InShanghai,thousandsofbuseshavebeenusingB

60、eidou.Whenwearewaitingforabus,wecanknowwhenitisabouttocome.ManysmartphoneshavealsobeenusingBeidou,“Manypeoplesay,letmeturnonmyGPS.Infact,theirphonesareusingBeidou,jokesasalespersoninBeijing.4. Accordingtothearticle,howmanycountrieshaddevelopedtheirownpositioningsystemsbeforeChina?A.Two.B.Three.C.For

61、ty-fiveD.Forty-four.5. WhendidChinasendthefirsttwoBeidousatellitesintospace?A.In1994.B.In2000.C.In2008.D.In2018.6. Whatcanwelearnfromthelastparagraph?A.Beidouisverypowerful.B.ManypeoplehavebeenusingBeidou.C. GPScanbemorepowerfulthanBeidou.D.FewsmartphoneshavebeenusingBeidou.7. Whichofthefollowingist

62、rue?A. TheBeidousystemhasalreadybeencompletedsinceMay17,2019.B. Chinadidnthavetodependonforeignpositioningsystemsbefore.BeiDou-2groundsystemnotonlyservesChinabutalsoprovidesusersintheAsia-Pacificregionwithmorethantensatellitesandofferedservicesabove.ThethirdphaseinvolvedthedevelopmentoftheBeiDou-3sy

63、stem,whichstartedin2009andwascompletedinJune,2020.AsoneoftheIGEmembers,ChinaisalwayscooperatingwithforeigncountriesanduseBDStoserveglobaluserswithhighperformanceandhighqualityinscientificresearch.BeiDoussatellitesaremoreadvancedthanthoseofGPS.IntheAsia-Pacificregion,BeiDouclaimsa10-cmaccuracy,compar

64、edwith30cmpositioningwithoutdoingwrongofferedbyGPS.Americabeganupgradingitssystemin1997butitmaytakeanother15yearstofinishtheproject.18. Whichofthefollowingnameisdifferentfromtheotherthreeaccordingtothepassage?A.BDS.B.GPS.C.Galileo.D.Russia.19. WhafstheimportanceofthesuccessfullaunchofBDS?A. ItmeansB

65、DSwillbetheearliestnetworktoprovidegloballocationdata.B. ItmeansBDSwillbethefourthnetworktoprovidegloballocationdata.C. ItmeansChinacanfullytakechargeofaglobalnavigationsatellitesystem.D. ItmeanswecanstopAmericanofficialsfromturningoffthesatellitessignals.20. WhatdoesParagraph3mainlytalkabout?A.IttalksaboutthreephasesofworkonBDS.