重庆市涪陵中学2025届高考全国统考预测密卷英语试卷含解析

重庆市涪陵中学2025届高考全国统考预测密卷英语试卷注意事项:1．答题前，考生先将自己的姓名、准考证号码填写清楚，将条形码准确粘贴在条形码区域内。2．答题时请按要求用笔。3．请按照题号顺序在答题卡各题目的答题区域内作答，超出答题区域书写的答案无效；在草稿纸、试卷上答题无效。4．作图可先使用铅笔画出，确定后必须用黑色字迹的签字笔描黑。5．保持卡面清洁，不要折暴、不要弄破、弄皱，不准使用涂改液、修正带、刮纸刀。第一部分（共20小题，每小题1.5分，满分30分）1．Thegovernor’sstatementonemployment________astormofcriticism,A．setupB．setoutC．setaboutD．setoff2．Withpeoplepayingattentiontofitness,self-servicemini-gyms,eachcoveringabout5squaremeters,________inChina’smajorcitiestheseyears.A．havesprungup B．sprangupC．hadsprungup D．springup3．Oneisexpectedtobehave_________onsomespecialoccasions.A．accurately B．precisely C．appropriately D．rightly4．Thegeneralsecretarystressedthatwhathehadjustsaidwasonlyhis_________view,notofficialintentions.A．private B．separate C．personal D．single5．—HowaboutgoingsightseeingthisSaturdayafternoon?Sorry,I_______myresearchreportthewholeweekend.A．willhavewritten B．willbewritingC．havewritten D．havebeenwriting6．—Iamgainingweight.Ineedtoseeadoctor.—ButIthinkyoueattoomuch.___________.A．Neglectofhealthisdoctor’swealth B．Laughatyourills,andsavedoctors’billsC．Dietcuresmorethanthedoctor D．Anappleadaykeepsthedoctoraway7．Apublichealthcampaign_____thenumberofheartdiseasedeathsby80percentoverthepastthreedecades．A．hadreduced B．hadbeenreducedC．hasreduced D．hasbeenreduced8．Althoughhedidnotdoit___________,hedefinitelyhadsomeresponsibility.A．instantly B．deliberatelyC．accidentally D．casually9．Thereasonwhyheadaptedtothenewsituationsquicklyisthathehada________attitude.A．changeableB．stableC．movableD．flexible10．—Canyoudomeafavour,Mr.Smith?Mycar______start.—Noproblem.Youcancountonit.A．won’tB．mustn’tC．needn’tD．shouldn’t11．JamesSmithandhisgirlfriendwenttoChenyiSquaretocelebratetheNewYear,never_________.A．returned B．toreturnC．returning D．havingreturned12．Hehasnoideawhatthebookisabout．Hehavereaditverycarefully．A．needn’t B．shouldn’t C．can’t D．mustn’t13．Inviewofrapidlyagingpopulation,thesecond-childpolicyatthestartof2016.A．isadoptedB．wasadoptedC．hasbeenadoptedD．wasbeingadopted14．Doyouknowthat______chairmanofthemeetinghasannouncedthatMrHodgehasbeenmade______managerofthisfactory?A．the,the B．/,the C．the,/ D．a,a15．--Jassy,youspeakChinesesofluently!______.Youarelying,Ihavetosay.B．Thanksalotforsayingso.C．That’snoneofyourbusiness.D．Ican’tagreemore.16．．WhatIlikeaboutHarvardisthere’stheoldclassicallook—thereareparksandtraditionalbuildings.A．why B．where C．that D．how17．Thecollegeexaminationis________________easierthisyearthanIhaveexpected.A．fairly B．quiteC．rather D．very18．Becalm,Madam.Canyouremember_____________youhadyourmobilephonestolen?A．whenwasitthat B．thatitwaswhenC．whereitwasthat D．itwaswherethat19．_______thosepastyears,wecouldn’thelpfeelingsorryforourparentswhoneverhadarestalltheyearround.A．Lookingbackupon B．Lookingaround C．Lookingout D．Lookingup20．_____thatitwassoldoutwhenitcameout. A．Sowashersuccessfulbook B．Sosuccessfulwasherbook C．Soherbookwassuccessful D．Sosuccessfulherbookwas第二部分阅读理解（满分40分）阅读下列短文，从每题所给的A、B、C、D四个选项中，选出最佳选项。21．（6分）WhenTVnewsprogramsreportwarsordisasters,theeditorsrarelyusethemosthorrifyingpicturesofdeadorwoundedvictimsbecausetheydon’twanttoupsettheirviewers.Evenso,viewersareusuallywarnedinadvancethatthey“mayfindsomeofthesedisturbing”sotheycanlookawayiftheychoose.Butthemenandwomenwhosejobsaretorecordthosescenes--theTVcameramen—havenosuchchoice.Itistheirdutytowitnessthehorrorsofthewarandrecordthem,nomatterhowhorrifyingandunpleasanttheymaybe.Consequently,itisoneofthemostdangerous,exposedandemotionallytaxingjobthattheworldoffers.Today,thedemandfortheirworkisrising.Theexplosionofsatellitebroadcastingand24hournewsinrecentyearshavecreatedanalmostinsatiable(无法满足的)demandforTVinformation.ButmajorbroadcastersandtheTVnewsagencies--suchasReutersandWTNhaveneverhadenoughstafftomeettheworldwidedemandforup-to-datepictures,soincreasinglytheyturnto“Freelance”TVcameramen.Thesefreelancecameramenareindependentoperatorstiedtonoparticularorganization.Theywillworkforanycompanywhichhiresthemforjustafewhoursorforseveralweeksinawarzone.Butifafreelancecameramanisinjuredinthecourseofthejob,theTVcompanyisnotresponsibleforhim.Thefreelancermustsurviveonhisown.“TVwillalwaysneedhard,vividmovingpictureswhicharefresh,butthesecompaniesfeeluncomfortablewithlargenumbersofemployeesontheirbooks,”explainsNikGrowing,onceforeigneditorforBritain’sChannel4NewsandnowaBBCnewspresenter.“Byhiringfreelancers,theycanbuyintheskillstheyneedonlywhentheyneedthem.Italsoenablesthemtocontractouttherisk,”hesays.1、Theunderlinedword“taxing”inPara1mostprobablymeans_________.A．demandingB．strikingC．satisfyingD．encouraging2、TVnewsagenciesturntofreelancecamerameninorderto_______.A．saveexpensesandavoidriskB．getfirsthandinformationandpicturesC．lookforpicturesthatareoffinequalitiesD．buythehorrifyingpicturestheyneed3、Fromthepassagewecanknowthat_______.A．TVcameramenshouldbegivenbetterchoiceofworkB．TVcameramenarebeingchallengedbythefreelancersC．TVcameramenhavetowitnessdisastersandkillingwhethertheylikethemornotD．TVcameramenhavetocontractouttherisksfortheircompanies4、Theauthorofthepassageshowshis_______thefreelancecameramen.A．respectforB．sympathytoC．ignoranceofD．admirationto22．（8分）Scientistshaveprovidednewevidencetohelpsolveoneoftheworld’soldestmysterieszebrasstripes.Researchersrecentlydescribedexperimentsshowingthathorseflieshaveadifficulttimelandingonzebraswhileeasilylandingonhorsesofasinglecolor.Inoneexperiment,theresearchersputblanketswithstripesonhorsesandsawthatfewerflieslandedonthem."Theyflypastthemorhitthemandbounceoff,"saidTimCarooftheUniversityofCalifornia-Davis.Hewastheleadwriterofareportonthestudy.ThereportwaspublishedinthejournalPLOSONE.Closelyrelatedtohorses,theworld’sthreezebraspeciesareknownfortheirblack-and-whitestripedbodies.ZebrasarenativetoAfricassavannas,orgrasslands.Theappearanceofthestripesisdifferentfromonezebratothenext.Therehavebeenfourmaintheoriesaboutthereasonswhyzebrasdevelopedstripes.Thefirsttheoryistoavoidattacksbymeat-eatinganimals.Anotheristhatzebrashaveaneasiertimerecognizingotherzebras.athirdideaisthermoregulation,whichistheabilityofacreaturetocontrolitsbodytemperature,evenwhenthesurroundingtemperatureisdifferent.Thefourththeoryistopreventattacksbybitingflies.Onlythelaststandsup,Carosaid."Mostbiologistsinvolvedinresearchonmammalcolorationacceptthatthisisthereasonwhyzebrashavestripes.UniversityofBristolbiologistMartinHowworkedwithCaroonthestudy.Hesaidstripesmayconfuseflieswhentheygettooclosetozebras.Africanhorsefliescarrydiseases,suchastrypanosomiasis.Thesicknesscancauseweaknessandbedeadly.“Inadditiontostripesthatpreventcontrolledlandingsbyhorseflies,zebrasarealwaysmovingtheirtailandmayfrightenoffthehorsefliesiftheydolandsuccessfully,"MartinHowsaid.Headdedthatzebrasarealsousingbehavioralmeanstopreventfliesfrombitingthem1、Whydidtheresearchersputblanketswithstripesonhorses?A．ToconfuseAfricanhorseflies.B．Todrawtheattentionofrealzebras.C．TohelpdriveawayAfricanhorseflies.D．ToseehowAfricanhorsefliesrespondedtothem.2、WhatdowelearnaboutzebrasfromParagraph3?A．Theylookthesametothehumaneye.B．Theirstripesaredifferentfromeachother.C．Zebras'livinghabitsaresimilartohorses.D．Threezebraspeciesworldwideareendangered.3、AccordingtoTimCaro,howdozebrastakeadvantageoftheirstripes?A．Theykeephorsefliesfrombitingthem.B．Theyusethemtoavoidattacksbyotheranimals.C．Theycontroltheirbodytemperaturethroughthem.D．Theycaneasilyrecognizeeachotherthroughthestripes.4、WhyarethediseasecarrierAfricanhorsefliesmentionedinthetext?A．Tohelpusknowmoreaboutsuchflies.B．Totellushowzebrassurvivebitingflies.C．Toexplainaboutacauseofdeathofzebras.D．Toshowthenecessityforzebrastoavoidflies.5、Whatisthebesttitleforthetext?A．Whydozebrashavestripes?B．Howdidzebrasevolvefromhorses?C．Whatistheworld’soldestmystery?D．Whendidzebrasstarttopreventhorseflies?23．（8分）Theworld’sfirstself-drivingtaxisbeganpickinguppassengersinSingaporerecently.Selectmembersofthepubliccanhail(招呼)afreeridethroughtheirsmartphonesintaxisoperatedbynuTonomy,anautonomousvehiclesoftwarestartup.Whileanumberofcompanies,includingGoogleandVolvo,havebeentestingself-drivingcarsonpublicroadsforseveralyears,nuTonomyisthefirsttoofferridestothepublic.ItslaunchinSingaporeisbeatingride-hailingserviceUber,whichplanstoofferridesinautonomouscarsinPittsburghsoon.NuTonomyisstartingsmall—sixcarsnow,growingtoadozenbytheendoftheyear.Thelong-termgoalistohaveafullyself-drivingtaxifleet(车队)inSingaporeby2018,tohelpcutthenumberofcarsonSingapore’sovercrowdedroadsfrom900,000to300,000.Eventually,themodelcouldbeadoptedincitiesaroundtheworld,nuTonomyhopes.“Whenyouareabletotakethatmanycarsofftheroad,itcreatesalotofpossibilities.Youcancreatesmallerroads,youcancreatemuchsmallercarparks,”saidDougParker,nuTonomy’schiefoperatingofficer.Fornow,thetaxisonlyrunina2.5-square-milebusinessandresidential(住宅的)districtcalled“one-north”,andpick-upsanddrop-offsarelimitedtospecifiedlocations.RidersmusthaveaninvitationfromnuTonomytousetheservice.Thecompanysaysdozenshavesignedupforthelaunch,anditplanstoexpandthatlisttothousandsofpeoplewithinafewmonths.Thecars—modifiedRenaultZoeandMitsubishii-MiEVelectrics—haveadriverinfrontwhoispreparedtotakebackthewheelandaresearcherinthebackwhowatchesthecar’scomputers.EachcarisfittedwithsixsetsofLidar—adetectionsystemthatuseslaserstooperatelikeradar—includingonethatconstantlyspinsontheroof.Therearealsotwocamerasonthedashboardtoscanforobstacles(障碍)anddetectchangesintrafficlights.NuTonomywasformedin2013.Earlierthisyear,thecompanywasthefirsttowinapprovalfromSingapore’sgovernmenttotestself-drivingcarsinone-north.NuTonomyannouncedaresearchpartnershipwithSingapore’sLandTransportAuthorityearlierthismonth.Singaporeisidealbecauseithasgoodweather,greatinfrastructrueanddriverswhotendtoobeytrafficrules.Asaland-lockedisland,thecityof5.4millionpeopleisseekingcreativewaystogrowitseconomy,soit’sbeensupportiveofautonomousvehicleresearch.1、Itseemsthattheserviceofself-drivingtaxis________.A．isoperatedwithhightechnologyB．haspassedthroughitsinitialstageC．issupportedbyGoogleandVolvoD．willspreadtoothercountriessoon2、Itisimpliedinthepassagethatself-drivingtaxiscanfinally________.A．reducepassengers’fareB．cutdownfuelconsumptionC．ensurepassengers’safetyD．resultinbetterenvironment3、Accordingtothepassage,whatmakesitpossibleforSingaporetoprovideself-drivingtaxiserviceincludes________.A．itssmallareaandurbanpopulationB．supportfromitspeopleandgovernmentC．itsadvancedeconomyandtechnologyD．necessitytoimproveitsinfrastructure4、Whatdowelearnaboutthepresentself-drivingtaxisinSingapore?A．Driversdrivethemwiththehelpofresearchers.B．Onecangetintooroutofthemwhereveroneis.C．Hundredsofpeoplecantakeadvantageofthem.D．Youdonothavetopaywheneveryoutakethem.24．（8分）WhenWarrenBuffett,themostsuccessfulinvestor,wasaskedaboutthesecrettohiswealthandsuccess,herevealedthathereadeveryday,500pages,tobeprecise.Unfortunately,ifyou'realreadyworking9‒5,youmightnothavethetimetoreadatall,letaloneanentirebookaday.Butwhatifyoucouldgetthebenefitsofreadingwithoutsacrificingallofyourfreetime?Youcan!WiththeBlinkistapp,yougetthekeylearninginminutes,nothoursordays.Ourexpertstransformthesebooksintoquick,easy-to-understandinsights.Startwiththe5most-readbooks.1.ThirteenThingsMentallyStrongPeopleDon'tDobyAmyMorin12minreadingtime27kreadsDoyoustruggletogetoveryourfailures?Gettingoverthesecanhaveaprofoundinfluenceonyoureverydaylife.Morinshareshowhermostsuccessfulpatientsovercamethesedifficulties.2.HowtoStopWorryingandStartLivingbyDaleCarnegie19minreadingtime238kreadsEverwonderedwhyyoucan'tstopworryingaboutsomething?Bydefiningthesourceofyourstress,youcangetoveritonceandforall.Carnegiecameupwithaformulathathelpsyouhandleanyoverthinkingsituation.3.HowWillYouMeasureYourLife?byClaytonM.Christensen1minreadingtime17kreadsAreyoumakingtherighttrade-offs(权衡)inlife?Whilecareerachievementscanbesatisfying,neglectingyourfamilyandfriendscanbebadinthelong-run—inwaysyoucan'tevenimagine.4.FindingYourElementbyKenRobinson1minreadingtime62.4kreadsEveryonehasapassion.Ifyoudon'tknowwhatyoursis,itjustmeansyouhaven'tdiscoveredityet.Findouthowyoucanbreakfreeofsociety'sstrictrulesandfindyourcallinginlife.5.EmotionalIntelligencebyDanielGoleman16minreadingtime318kreadsDidyouknowifyourpulseraterisesabove100bpm,you'redeemedtooemotionaltothinkrationally?Youprobablyletfeelingscloudyourjudgmentmoreoftenthanyouknow.Golemanexplainshowyoucanavoidlettingyouremotionsruleyouandmakebetterdecisionsinlife.1、WhatkindofpeopledoestheBlinkistappbestsuit?A．Successfulinvestors. B．Richbusinessmen.C．Peoplewhohavelittletimeforreading. D．Studentswholovebooks.2、Whichbookhasbeenreadbythelargestnumberofpeople?A．HowtoStopWorryingandStartLiving.B．HowWillYouMeasureYourLife?C．FindingYourElement.D．EmotionalIntelligence.3、Whichbookoffersadvicetopeoplewhofeelstressed?A．ThirteenThingsMentallyStrongPeopleDon'tDo.B．HowtoStopWorryingandStartLiving.C．HowWillYouMeasureYourLife?D．FindingYourElement.25．（10分）TraditionalChinesemedicine（TCM）isgainingglobalpopularity．Accordingtoagovernmentwhitepaper，TCMhasbeenintroducedin183countriesandregionsaroundtheworld．Westerners'understandingofTCM，however，maybelimitedtoacupuncture，cuppingandmassage（针灸，拔罐和按摩）．Forinstance，thepurple，injury﹣likemarksleftonU．S．swimmerMichaelPhelps，backfromcuppingforthepurposeofrelaxinghismusclesandreducingpainbecamethecenterofattentionduringtheRioOlympicsin2016．Asamatteroffact，ChineseherbsplayamoreimportantroleingettingridofdiseasesandkeepingthebodyingoodconditionintheTCMtreatmentsystemthanphysicaltreatment．Itisthereforedishearteningtoknowthatwhile103WorldHealthOrganizationmembercountrieshavegivenapprovaltothepracticeofacupuncture，notmanyrecognizeChineseherbalmedicine．TCMfallsfarbehindWesternmedicineowingpartlytotheslowdevelopmentofChineseherbs．Herbsaremadeintopills，powderandsoup，andthekindofherbsused，theirqualityandquantity，andtheprocessingoftheingredients（原材料）jointlydeterminetheeffectivenessoftheprescription．ComparedwithWesternmedicine，whichhasstandardizeddrugproductionprocessesandtreatmentmethods，TCMlacksstandardization，withthechemicalcompositionandfunctionsofitsmedicinesbeingunclearandtheireffectsbeingunstable．Fortunately，standardizationhasimprovedinrecentdecades，withanincreasingnumberoffactoriesproducingpatentedTCMdrugs．AnotherfactorthathaspreventedthedevelopmentofTCMprescriptiondrugsisthelackofcreativity．WhileWesternmedicine﹣makingcompaniescomeupwithnewproductseveryyear，TCMdrugproducerstendtomakemedicinesaccordingtoprescriptionshandeddownfromthepast．ChinesechemistTuYouyou'swinningthe2015NobelPrizeinPhysiologyorMedicineforherresearchintomalaria（疟疾）treatmentmaydrivecreativitytosomeextentinChina'sTCMindustry．However，thecurrentstateofaffairscannotbechangedwithinashorttime．1、WhydoestheauthormentiontheexampleofMichaelPhelps？A．Becausehewasinjuredinhisswimming．B．BecausecuppingisakindofimportantTCMtreatment．C．BecausewesternersknowalittleaboutTCM．D．BecausewesternersattachgreatimportancetoTCM．2、Whydon'tsomemembercountriesofWHOrecognizeChineseherbalmedicine？A．BecauseChineseherbscangetridofdiseases．B．Becausetheyonlyapprovethepracticeofacupuncture．C．BecauseWesternmedicineismoreeffective．D．BecausemedicinemadeoutofChineseherbsdevelopsslowly．3、ComparedwithWesternmedicine，whatistheweakpointofTCMinParagraph4？A．Themethodsofplantingherbs．B．Theeffectivenessofprescription．C．Lackinginstandardization．D．Itsstablefunctions．4、ThelackofcreativityinTCMreferstothefactthat．A．medicine﹣makingcompanieslackcreativityB．prescriptionsaregotfromthepastC．WesterncompaniesaremoreexperiencedD．medicine﹣makingcompanieslackdrivingforce第三部分语言知识运用（共两节）第一节（每小题1.5分，满分30分）阅读下面短文，从短文后各题所给的A、B、C和D四个选项中，选出可以填入空白处的最佳选项．26．（30分）AliandAbrahamwerebrothers.Theirparentsdiedveryearly.Theyleftfortheirsonsacow.Aliwascunning(狡猾的).Hewas1,too.Abrahamwaskindand2.Hetrustedhiselderbrother.Theywantedto3theirfather’sproperty.Alisaid,“Iwillbevery4withyou,Abraham.Youtakethefrontpartofthecowasyourshare.Iwilltakethehindsideofthecow.Eachonegetshis5onlyfromhisshare.”Abraham6thecowverywellfreshgrassandwater.Thecowbecame7.Itgavelotsofmilk.Aligotthemilk.Hesoldthemilkandgotalotofmoney.Buthedidnotsharethe8withAbraham.Abrahamaskedhisbrotherabouthis9ofmoney.Alireplied,“Igotthemilk10mypartofourcow.Hindpartismineaccordingtothe11.Eachofusgetsthebenefitsonlyfromhis12Abrahamsaidnothing.A13manadvisedAbraham.Hesaidsomethinginthe14ofAbraham.ThenextdayAliwasmilkingthecow.ThenAbrahambeatthecowinthefrontpart.Thecowstartedkicking.Ali15Abraham.“You16!Whydoyoubeatthecow?Donotseememilkingthecow?”“Thefrontpartofthecowismine.Icando17.Thatisouragreement,”saidAbraham.Alicouldnotsayanything.18heagreedtosharethemoney.Abrahamsaid,“Not19money.Youmustalsosharetheworkoffeedingandtakingcareofthecowtoo.”Ali20.1、A．greedyB．smartC．diligentD．careless2、A．luckyB．selfishC．honestD．sensitive3、A．sellB．keepC．donateD．divide4、A．strictB．fairC．seriousD．patient5、A．profitB．rewardC．prizeD．award6、A．knewB．understoodC．fedD．remembered7、A．energeticB．healthyC．activeD．aggressive8、A．cowB．foodC．milkD．money9、A．shareB．amountC．useD．secret10、A．forB．fromC．ofD．to11、A．planB．decisionC．lawD．agreement12、A．laborB．knowledgeC．partD．effort13、A．kindB．wiseC．cruelD．funny14、A．earB．noseC．faceD．head15、A．escapedfromB．camefromC．laughedatD．shoutedat16、A．liarB．thiefC．foolD．monster17、A．nothingB．anythingC．somethingD．everything18、A．FinallyB．SuddenlyC．HappilyD．Gradually19、A．reallyB．entirelyC．justD．always20、A．quarreledB．repliedC．criedD．agreed第二节（每小题1.5分，满分15分）阅读下面材料，在空白处填入1个适当的单词或括号内单词的正确形式。27．（15分）Ateahouseisaspecialhousewhichprimarilyservesteaandotherlightrefreshments(茶点).Itsfunctionvarieswidely1．(depend)ontheculture.InChina,ateahouseisaplace2．peoplegathertoenjoytea,chatandsocialize.It3．(consider)asasymbolofChineseteacultureandpeople’sleisurelives.Chineseteahousesenjoyalong-standinghistory.Theydevelopedfromtea4．(stand)intheWesternJINDynasty,tookshapeintheTangDynasty,developed5．(gradual)intheSong,Yuan,MingandQingDynastiesandbecameboominginmoderntimes.IntheSongDynasty,teahousesspreadalloverthecitiesandvillages,ataratecomparablewiththatofrestaurants.Theownerspreferredtodecoratetheirteahouses6．paintingsofcelebritiesorrareandpreciousplants7．(attract)customers.IntheMingandQingDynasties,thenumberofteahouseswentbeyondthatofrestaurants,gainingmuch8．(wide)popularityandbecomingmorefamous.Later,theacculturation(文化植入)ofwesterncultureforcedtraditionalChineseteahousestotakeon9．newlook.Sincereformandopening-up,withtherapiddevelopmentoftheeconomyandevidentimprovementofpeople’slivingstandards,teahouses10．(flower)inChina.第四部分写作（共两节）第一节短文改错（满分10分）28．（10分）假定英语课上老师要求同桌之间交换修改作文，请你修改你同桌写的以下作文。文中共有10处语言错误，每句中最多有两处。每处错误仅涉及一个单词的增加、删除或修改。增加：在缺词处加一个漏字符号（∧），并在其下面写出该加的词。删除：把多余的词用斜线(＼)划掉。修改：在错的词下划一横线，并在该词下面写出修改后的词。注意：1、每处错误及其修改均仅限一词；2、只允许修改10处，多者（从第11处起）不计分。Breakingtrafficrulesandlitteringarecommoninthesedays,causedseriousharmtolifeandtheenvironment、Changingthissituationrequiredeveryone'seffort、Asforme,I'llkeeptrafficlawinmindallthewaytoschool、IfIridethebicycle,I'llalwayskeeptotherightandnevercrossaroadwhenthetrafficlightturnsgreen、IfIwalk,I'llneverforgettousethepedestriancr