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BTeslamadeamajorbreakthroughinautomobileproduction.C.Teslahasfulfilledthesci-fiwriters'promises.D.ADASisthebestsystemintheglobalcarmarket.小题剂WhatisthefeatureofLevel4automationfordriving?已知A.StayinginthespecificlaneB.Drivingwithhandsfree.求：C.Drivingwithawanderingmind.D.Respondingwelltotraffieflow.在△AUWhatconributetothedifferentstagesofdevelopmentinselfdrivingcarsbetweenChinaandtheUS?2A.Differentlevelsofprivacyprotection.B.Differentcapacityfordevelopingproducts.C.Differentdataanalyticalabilities.D.Differenttrafficflowcontrolsystems.1.Whichsectionofanewspaperisthistextprobablytakenfrom?A.Fashion&Leisure.B.Education&.Lifestyle.C.Technology&Innovation.D.Arts&.Entertainment.0Thinkbacktothelasttimeyougotacomplimentfromsomeoneelse.Itprobablyfeltgood,evenforastranger.And-forthatmatter-itcanfeelgoodtocomplimentsomeoneelseaswell.满分Yet,mostpeopledon'tcomplimentothersasoftenastheyshould.ApaperbyXuanZhaoand三棱NicholasEpleyina2021issueoftheJournalofPersonalityandSocialPsychologyexploredwhythishappens.上Inonesetofexperiments,participantswererandomlyassignedtoeithergeneratecomplimentsorto并receivecompliments.Forexample,inonestudy,pairsofpeoplewalkingtogetherinapublicparkwere角Gstopped.Onaverage,theykneweachotherforalmost10years.Oneparticipantwroteoutthreecomplimentsfortheotherpersonthatweresupposedtobenicethingsthattheyhadn'ttoldthatpersonbefore.Then,thecomplimentwriterpredictedhownicetheotherpersonwouldfeelreceivingthecompliment.Theyalsofocusedonhowawkwardthatpersonwouldfeel.Inaddition,theyratedtheircomplimentsforhowwarmtheywereaswellashowwell-phrasedtheywere.Then,therecipient()readthecomplimentsandratedhowgoodtheyfeltreceivingthem,howawkwardtheyfelt,andhowwarmandwell-phrasedthecomplimentswere.Thekeyfindingwasthatparticipantsunderestimatedhowgoodthecomplimentwouldmakethe12recipientfeelandoverestimatedhowawkwardtherecipientwouldfeel.Theyalsoslightlyunderestimated-ahowwarmtherecipientswouldfindthecompliment.Finally,participantsstronglyunderestimatedhowwell-phrasedrecipientsfoundthecomplimenttobe.0Anotherstudydemonstratedthatthismisestimationoftheimpactofcomplimentsaffectswhetherpeoplechoosetogivethem.Inafinalstudy,individualswroteoutcomplimentsforanotherpersonintheirlives.Then,participantsweredirectedtofocuseitheronthewarmthofthecomplimentoronhowwell-phraseditwas.Participantswhofocusedonthewarmthofthecomplimentratedthemselveslaterasmuchmorewillingtodeliverthecomplimenttotheotherpersonthanthosewhofocusedonhowwellhraseditwas.Whatdoestheauthorfocusonabouttheexperimentinthethirdparagraph?A.Backgroundfacts.C.PurposeB.Findings.D.Process.Accordingtothefindings,whatdocomplimentsleastbring?A.Pleasure.C.Positivity.B.Warmth.D.Embarrassment.【2023届高三·英语试题(3)·第5页（共8页）】
分析求出方程sinx=x的根的个数，然后由子集概念得答案．
解答解：令f（x）=sinx-x，
∵f′（x）=cosx-1≤0，∴f（x）=sinx-x为单调函数，
又f（0）=0，∴集合A={x∈R|sinx=x}={0}．
∴集合A={x∈R|sinx=x}的子集为：∅，{0}，
子集个数为2．
故选：B．
点评本题考查子集与真子集，考查了函数零点的判断，是基础题．
