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设直线l1，l2分别是函数f（x）＝，图象上点P1，P2处的切线．l1与l2垂直相交于点P，且l1，l2分别与y轴相交于点A，B，则A，B两点之间的距离是（ ）
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高三下学期数学《》真题及答案
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某一杠杆在传递外力中输入力为P1输入力臂为L1输出力为P2输出力臂长度为L2其P1P2之值等于
L1：L2
L2：L1
（L2+L1）：L1
（L2+L1）：L2
如图9所示电路电源两端电压一定灯L1标有6V2W的字样闭合开关调节滑动变阻器的滑片位置使灯L1正常发
用灯L2替换灯L1后，滑动变阻器滑片P.应向左滑动
用灯L2替换灯L1后，电流表的示数变化了1A
I∶I′＝3∶2，P ∶P′＝3∶2
I∶I′＝2∶3，P1∶P2＝2∶3
已知两直线l12x－y－2＝0与l2x＋y＋3＝01直线l经过l1与l2的交点且与l2垂直求直线l的
如图甲所示请问⑴电灯L1L2的连接方式2分⑵电流表A.1A.2各自测量谁的电流2分⑶两只电流表的示数
设直线l1l2分别是函数fx=图象上点P1P2处的切线l1与l2垂直相交于点P.且l1l2分别与y轴
，
则则△PAB的面积的取值范围是 A.(0,1) B. (0,2)
(0,+∞)
(1,+ ∞)
下面是两个额定电压为220V的白炽灯L1和L2的电压与电流关系的图象1请根据图象计算L2的额定电功率
设直线l1l2分别是函数fx=图象上点P.1P.2处的切线l1与l2垂直相交于点P.且l1l2分别
，
，则△PAB的面积的取值范围是 （A.）(0,1) （B.）(0,2) （
）(0,+∞) （
）(1,+∞)
设r1r2和L1L2分别是变压器初次级绕组的电阻和自感M是其互感则理想变压器的条件是
r1=r2=0L1=L2=M=0
r1=r2=0L1=L2=M=∞
r1=r2=∞L1=L2=M=0
r1=r2=∞L1=L2=M=∞
已知A.B.为抛物线C.y2=4x上的两个动点点A.在第一象限点B.在第四象限l1l2分别过点A.B
设直线l1l2分别是函数fx=图象上点P1P2处的切线l1与l2垂直相交于点P且l1l2分别与y轴
（0，1）
（0，2）
（0，+∞）
（1，+∞）
如图函数y=和y=-的图象分别是l1和l2.PC⊥x轴垂足为C.交l2于点A.PD⊥y轴垂足为D.交
如图曲线C的方程为y=fx点32是它的一个拐点直线l1与l2分别是曲线C在点00与32处的切线其交
如右图所示l1是反比例函数 在第一象限内的图象且过点A21l2与l1关于x轴对称那么图象l2的函数
某一杠杆在传递外力当中当输入力为P1输入力臂长为L1输出力为P2输出臂长为L2时其P2P1之值等于
L1：L2
L2：L1
（L2+L1）：L1
（L2+L1）：L2
设直线l1l2分别是函数图象上点P1P 2处的切线l1与l2垂直相交于点P且l1l2分别与y轴相交
（0，1）
（0，2）
（0，+∞）
（1，+∞）
两只灯泡L1和L2的额定电压相同额定功率之比P1∶P2=2∶1并联后接在电路中总电流为3安培则通过L
如图直线l1:y=kxk>0与直线l2:y=-kx之间的阴影区域不含边界记为W.其左半部分记为W1右
下面是两个额定电压为220V的白炽灯L1和L2的电压与电流关系的图象1请根据图象计算L2的额定电功率
1如图11所示电路灯L1和L2是完全相同的两盏灯若开关S.闭合后电流表示数为0.3A则通过灯L1的电
已知函数fx=且fx的图象在x=1处与直线y=2相切.1求函数fx的解析式2若P.x0y0为函数fx
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IncredibleexperiencesinBucharestAdmireoneoftheworld'slargestbuildingsTheworld'sbiggestparliamentarybuildingPalaceofParliamenthappenstobeinBucharest.Hour﹣longguidedtoursmanagetotakeinjustafractionofthebuilding'sthree﹣million﹣plussquarefeettherearemorethanathousandroomsandfocusonthetonsofmarblehardwoodandgoldusedinthebuilding'sconstructioninthe1980satimewhenRomaniawastryingtofeeditsownpeople.CeausescuandhiswifeElenabothplayedadirectroleintheconstruction.ItwasoriginallyintendedtohousethepresidentialofficesandtheCentralCommitteeoftheRomanianCommunistPartybutwasneverfinished.Seeremainsofold'Paris''ParisoftheEast'wasBucharest'snicknameinthedecadesbeforeWorldWarII.Decadesofcommunistmisruleandatragicearthquakein1977broughtmuchoftheoldcitydownbutthereareplaceshereandtherewherethatformerelegancecanstillbeglimpsed.TheCismigiuGardensinthecenterofthecityisapearlofparkbuiltaroundaromanticlakeandfeaturingold﹣growthtreesandgraciouswrought﹣ironsignpostsandbenches.LearnaboutRomania'srootsWalkingthoughBucharest'sbusystreetsit'seasytoforgetthatoutsidethecapitalandaUlargecitiesRomaniaisalargelyagriculturalcountrywithalongandrichpeasanttradition.TheamazingMuseumoftheRomanianPeasantshowsofftheelaboratewoodworkingpottery﹣makingegg﹣paintingandweavingskillsofthepeasantryinawaythat'sbotheducationalandamusing.Smalltongue﹣in﹣cheeksignsattheentrancetoeachroompokefunatmodernlifebringachuckleanddrawyouin.Downstairsthere'sasideexhibitionontheCommunists'effortstonationalizethepeasantryinthe1970sand1980s.Appreciate21st﹣centuryartRomaniahasexplodedontothecontemporaryartsceneinrecentyears.TheexcitementwasgeneratedinitiallybyagroupofyoungpaintersandvisualartistsfromthenortherncityofCluj﹣Napocabutatleastsomeoftheactionhasshiftedtothecapitalasnewgalleriesanddesigncentersopenup.It'shardtopinpointpreciselywhatconstitutesRomaniancontemporaryartthoughcriticspointtosharedelementsofwitanddarkhumorasombermoodandbitsofsurrealismindefiningacommonstyle.1TouriststoBucharestcandothefollowingthingsEXCEPT.A.admiringbeautifulsceneryofaparkB.appreciatingitsuniquecontemporaryartC.learningabouttheagriculturaldevelopmentinRomaniaD.seeingtheoldcityofBucharestthathasbeenwell﹣preserved2Itcanbeinferredfromthepassagethat.A.CeausescuandElenaweretwofamousarchitectsB.Romaniansmighthavesufferedalotduringthe1970sand1980sC.PalaceofParliamentinBucharestisthelargestbuildingintheworldD.Romanian's21st﹣centuryartoriginatedfromthecapitalcityBucharest
Thecreationcankeeppeopleawayfromtheirsmartphonesinawaysimilartoe﹣cigaretteshaveallowedpeopletoquitsmoking. A.that B.how C.which D.what
Goingtouniversityissupposedtobeamind﹣broadeningexperience.Thatassumptionispossiblymadeincontrasttotrainingforworkstraightafterschool.Butisitactuallytrue?JessikaGolleoftheUniversityofTubingenGermanythoughtshewouldtrytofindout.Herresulthoweverisnotquitewhatmightbeexpected.Itshowsthatthosewhohavebeentouniversitydoindeedseemtoleavewithbroaderandmoreinquiringmindsthanthosewhohavespenttheirimmediatepost﹣schoolyearsinvocationaltrainingforwork.Howeveritisnotthecasethatuniversitybroadensminds.Ratherworkseemstonarrowthem.Afterstudyingtheearlycareerof2095GermanyoungstersDr.Gollereachedtheconclusion.DuringtheperiodunderinvestigationGermanyhadthreetracksinitsschools:alowoneforpupilswhowouldmostprobablyleaveschoolearlyandentervocationaltraining;ahighoneforthosealmostcertaintoenteruniversity;andanintermediateonefromwhichtherewasachoicebetweentheacademicandvocationalroutes.Theteamusedtwostandardizedteststoassesstheirvolunteers.Onewasofpersonalitytraitsandtheotherofattitudes.Theyadministeredbothteststwice﹣oncetowardstheendofeachvolunteer'stimeatschoolandthenagainsixyearslater.Oftheoriginalgroup382wereontheintermediatetrackanditwasonthesethattheresearchersfocused.Ofthem212wenttouniversityandtheremaining170chosenforvocationaltrainingandajob.WhenitcametothesecondroundoftestsDrGollefoundthatthepersonalitiesofthosewhohadgonetouniversityhadnotapparentlychanged.Thosewhohadundergonevocationaltrainingandthengotjobswerenotthatmuchchangedinpersonalityeither﹣exceptinonecrucialrespect﹣theyhadbecomemoreresponsible.Thatsoundslikeagoodthingcomparedwiththecommonpublicimageofundergraduatesasabunchofpamperedlayabouts娇生惯养的闲人.Butchangesinattitudetheresearchersrecordedweremoreworrying.Intheuniversitygroupagainnoneweredetectable.Butthosewhohadchosenthevocationalrouteshowedmarkeddropsininterestintasksthatareinvestigativeandenterprisinginnature.Andthatmightrestricttheirchoiceofcareers.Someinvestigativeandenterprisingjobssuchasscientificresearchareindeedofflimitstothedegreeless.ButmanyparticularlyinGermanywithitstraditionofvocationaltrainingarenot.Theresearchersmentionforexamplecomputerprogrammersfinance﹣sectorworkersandentrepreneursascareersrequiringtheseattributes.IfDrGolleiscorrectandchangesinattitudebroughtaboutbytheverytrainingGermanypridesitselfonarenarrowingpeople'schoicesthatisindeedamatterofconcern.1Comparedwithstudentsgoingtouniversitythosechoosingthevocationalroute.A.showmorechangesintheirattitudesB.finditmoredifficulttolandsuitablejobsC.aremoreinterestedintasksrelatedtoscienceD.aremoreresponsibleanddotheirworkbetter2Theunderlinedword'detectable'inPara.9canbereplacedby.A.desirableB.predictableC.noticeableD.changeable3WhichofthefollowingisTRUEaccordingtothepassage?A.Universitygraduatesdon'tneedtoreceivetrainingatall.B.Germanyshouldchangethetraditionofvocationaltraining.C.Peoplewithoutadegreemayfindalimittotheirchoicesofcareers.D.Incomparisonwithvocationaltraininguniversitiescangreatlybroadenpeople'sminds.4Inwhichcolumnofamagazinecanyoufindthepassage?A.Science.B.Culture.C.Economy.D.Education.
﹣ThesewinterdaysaregettingtobemorethanIcantake. ﹣Holdon.Accordingtotheweatherreportpeoplehavesomereliefbytheendoftheweek. A.would B.should C.need D.shall
1AccordingtotheadvertisementLondonZoo. A.providesanidealplaceforfamiiestoholdtalksinanrainforest. B.combinesentertainmentandinteractiveexperienceswithcreatures. C.offersunlimitedaccesstopremierattractionswithalittlemorecharge. D.caterstothecuriosityofchidlrenwithguidedexplorationandinteractions. 2Itcanbelearnedfromthepassagethat. A.visitorswillbeadmittedtothezooattheirconvenience. B.driversshallgetparkingspacewithapaidentryticket. C.latecomersmaymisssomeoftheanimalexhibits. D.wheelchairuserscanhaveaccesstoanybuilding.
Thegirlwasthenhitasecondtimebyanothervananelderlytrashcollectorcametoheraidaccordingtosomewitnesses. A.before B.where C.until D.when
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