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1、第二題閱讀理解體裁話題命題形式押題指數(shù)科技說明文北斗導(dǎo)航系統(tǒng)細(xì)節(jié)理解題1推理判斷題2主旨大意題3Chinahascompleteditshome-grownBeiDouNavigation(導(dǎo)航）SatelliteSystem(BDS)withthesuccessfullaunchoftwomoreBDS-3satelliteswhichworkwith17otherBDS-3satellitesalreadyinspace,andstartedtoprovideservicesforcountriesparticipatingi
2、ntheBeltandRoadInitiative(倡議）inlate2018.TheBDS,whichwillcompeteagainstAmerica'sGlobalPositioningSystem(GPS),willprovidehigh-precision,reliablepositioning,navigationandtimingservicesanywhereintheworldbytheendof2020.TheBeltandRoadInitiative(BRI)isanambitiousefforttoimpr
3、overegionalcooperationandconnectivityinatrans-continentalrange.Theinitiativeaimstostrengtheninfrastructure(礎(chǔ)設(shè)施）,trade,andinvestmentlinksbetweenChinaandsome65othercountries.ItisalsoexpectedtoincreaseBeijing'sinfluenceinthesecountries."ThisisakeystepfortheBDSindevelopin
4、gfromaChinesehomesystemtoaregionalandthenaglobalnavigationsystem,"saidYangChangfeng,chiefdesigneroftheBDS.Chinaplanstolaunchanother11BDS-3satellitesinthecomingtwoyears.ChinadevelopedtheBDSthroughauniquetechnologicalapproach,contributingChinesewisdomtothetheoryandconst
5、ructionofinternationalsatellitenavigationsystems.Altogether18BDSsatelliteshavebeensentintospacein2018,whichhasseenthemostintensivelaunchoftheBDSsatellites.Theyimprovedtheirworkefficiencybyreformingthemanagementprocess.Thenumberofsatellitestaffatthelaunchcenterhasbeenr
6、educedbnearlyhalf,andthetestingtimelaunchhasbeenshortenedbynearlyathird.InthecastproductionbaseinBeijing,severalBDSsatellitesarebeingmanufacturedatthesametime.Theytrytoimproveintelligentmanufacturingcapability,andcutdownproductiontimeConstructionoftheBDS-3systemhasacc
7、elerated.OncetheBDSisfullycompleted,itwillbethefourthglobalsatellitenavigationsystemafterAmerica'sGPS,Russia'sGLONASSandtheEuropeanUnion'sGalileoSatelliteNavigaSystem.Indiatoo,isbuildingitsnavigationsystemcalledtheIndianRegionalNavigatioSatelliteSystem(IRNSS),withanop
8、erationalnameofNAVIC.1.WhencantheBDSofferglobalservice?A.In2018.B.In2019.C.In2020.D.In2025.2.WhatcanweinferabouttheuseoftheB
