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Unit3Scienceandnature能力提升题组训练(A)Ⅰ.阅读理解Manyyearsago,peoplereliedonthesun,themoonandstarstofindtheirwayaround.Later,thecompasswasintroduced.Andnow,wehavesatnav(卫星导航)systemstoguideus.Asatnavsystemusesgroupsofsatellitestoshowtheuser’slocation.Theysendinformationtoareceiver,suchasasmartphone,toshowuswhereweare.TheearliestbuiltsatnavsystemistheGlobalPositioningSystem,whichbelongstotheUS.ThenthereisRussia’sGlobalNavigation(导航)SatelliteSystem,theEuropeanUnion’sGalileoandChina’sownsatellitenavigationsystem,BeiDou.OnOctober14,2017,anARJ21-700plane,whichwasthefirstdomestically-producedjetequippedwiththeBeiDounavigationsystem,successfullycompletedatestflight.TheresultsshowedtheperformanceofthesystemdevelopedbyChinamatchesthatofsimilarsystemsproducedabroad,accordingtotheCommercialAircraftCorporationofChina.Sinceitsintroductionin2000,theBeiDounavigationsystemhasseenincreasingnumbersofapplicationslinkedtoeverydaylife,fromsharedbikestofarming.Whenitcomestosharedbikes,smartlocksthatsupportBeiDouchipsoffermoreaccuratepositioningthanothers,makingiteasiertofindabike.FarmerscanuseBeiDou-enabledtractorstoplow(犁)thesoilanduseunmannedaircraftswithBeiDoutosowseeds,whichcanimproveefficiencyandmakebetteruseofresources.BeiDou’sfarmingapplicationshavespreadfromHeilongjiangProvincetoBeijing,Liaoning,Shanxi,HubeiandotherregionsacrossChina.Withitsmanyuses,theBeiDounavigationsystemisevenplayingabigroleintheBeltandRoad(“一带一路”)construction.“Todate,theBeiDousystemhascoveredmostpartsoftheAsia-Pacificregion,aswellascountriesalongtheSilkRoadEconomicBeltandthe21stCenturyMaritimeSilkRoad,”saidYangChangfeng,chiefdesigneroftheBeiDousystem.Today,therearemorethan20BeiDousatellitesaboveourheads,andChinaplanstolaunchevenmorethisyeartoexpandtheBeiDounetworktobetterservetheBeltandRoadInitiative.“AsBeiDouexpandsitsoverseasreach,itwillbeincreasinglypopularinthelogistics(物流)industry,”saidMiaoQianjun,secretary-generalofthenavigationservicesassociation.“Ships,forexample,canuseittopositionthemselveswhilesailingacrossoceanstoEuropeancountries,nolongerlimitedtoSoutheastAsianregionsinthenearfuture.”1.WhatcanweknowabouttheBeiDounavigationsystemaccordingtothearticle?A.Itwasusedsuccessfullyinanewjetplane.B.Itismorepowerfulthanothersatnavsystems.C.ItwasintroducedtoChinaonOctober14,2017.D.Itwasn’tusedinoureverydaylifeuntilrecently.2.Accordingtothearticle,theBeiDounavigationsystemisalreadywidelyusedfor.A.plowingthesoilandsowingseedsB.improvingtheefficiencyofnetworksC.producingmoresmartlocksforsharedbikesD.navigatingshipsacrossoceanstoEuropeancountries3.WhatisMiaoQianjun’sattitudetowardthefutureoftheBeiDousystem?A.Worried.B.Casual.C.Positive.D.Doubtful.语篇解读:本文是说明文,介绍了中国的北斗卫星导航系统在生活中的运用。答案及剖析:1.A细节理解题。根据第三段第一句话可知,装有北斗卫星导航系统的喷气式飞机成功试飞。2.A细节理解题。根据第六段中的Farmerscanuse...tosowseeds和BeiDou’sfarmingapplications...andotherregionsacrossChina.可知,北斗卫星导航系统已广泛用于耕地播种。3.C推理判断题。根据最后一段第一句话可知,北斗卫星导航系统将会在物流业中越来越受欢迎,故推知他的态度是乐观积极的。Ⅱ.七选五Mymotherisadiligentandkindwoman.Sheisverybusyfrommorningtillnight.Asateacher,sheworkshard.1.BothmybrotherandIloveherdearlyasshelovesus.Mymotherhasbeenteachingmathatamiddleschoolinmyhometown.Shegoestoworkearlyinthemorninganddoesnotreturnhomeuntillateintheafternoon.2.Shetreatsthemwithpatienceandteachesthemwell.Forherexcellentqualityandverygoodteachingresults,shehasbeenelectedasamodelteacherseveraltimes.3.Everyday,whenshecomesbackhomefromwork,shesetsaboutdoinghousework,sweepingthelivingroomandbedroomsorcleaningthefurniture,andputtingeverythingingoodorder.Sheseemstobebusyallthetime.Asshehasbeenverybusyworkingeveryday,shelooksolderthanherage.Butshelooksascheerfulandhappyasever.Motherneverbuysexpensivedressesforherself,butsheoftenbuyssomeinexpensivebuthighqualityclothesforus.4.Shejusteatsaplainmealoutsidewhensheistoobusytocookherself.Shelivesabusyyetsimplelife,withoutanycomplaints.Oftenshesaystous,“workwhileyouwork,andplaywhileyouplay.Thatisthewaytobehappyandgay.Ifyoudonotwork,youwillbecomelazyandbeofnousetosociety”.Whatapieceofgoodadvicethisis!5.Thisadviceofherswillalwaysserveasaguidetomybehavior.Mymotherisgreatindeed,andIalwaysfeelproudofher.A.Sheenjoyslisteningtoclassicmusic.B.Asamother,shetakesgoodcareofusandgivesuseverycomfort.C.Shelovesherstudentsandcaresforthem.D.Shenevergoestoexpensiverestaurantstoenjoymeals.E.Mymotherishard-workingandneverwastesmoney.F.Ineverforgetitandalwaysbearitinmymind.G.Canyoutellussomethingaboutyourmother?答案:1-5BCEDFⅢ.完形填空AHeroicDriverLarryworkswithTransportDrivers,Inc.Onemorningin2009,Larrywas1along165northafterdeliveringtooneofhis2.Suddenly,hesawacarwithitsbrightlightson.3hegotcloser,hefound4vehicleupsidedownontheroad.Onemorelookandhenoticed5shootingoutfromunderthe6vehicle.Larrypulledover,setthebrakeand7thefireextinguisher(灭火器).Twogoodburstsfromtheextinguisherandthefirewasputout.Themanwhohadhisbrightlightson8andtoldLarryhehad9anemergencycall.They10heardawoman’svoicecomingfromthewrecked(毁坏的)vehicle.11thevehicle,theysawthatawomanwastryingtogetoutofthebrokenwindow.Theytoldhertostay12untiltheemergencypersonnelarrived,13shethoughtthecarwas