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在直角坐标系xOy中，直线l的参数方程为（t为参数），以坐标原点为极点，以x轴的正半轴为极轴建立极坐标系，曲线C的极坐标方程为ρ＝2cosθ+2sinθ，直线l与曲线C相交于A，B两点，与y轴相交于...
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高三下学期数学《》真题及答案
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已知在直角坐标系xOy中直线l的参数方程为t为参数以坐标原点为极点x轴的正半轴为极轴建立极坐标系曲线
选修4﹣4坐标系与参数方程在直角坐标系xOy中直线l的参数方程为t为参数.在极坐标系与直角坐标系xO
在平面直角坐标系xOy中直线l的参数方程为t为参数曲线C.的参数方程为θ为参数.试求直线l和曲线C.
在平面直角坐标系xOy中已知直线l的参数方程为t为参数圆C.的参数方程为θ为参数.若点P.是圆C.上
在直角坐标系xOy中直线l的参数方程为t为参数在以O.为极点x轴的非负半轴为极轴建立的极坐标系中曲线
在平面直角坐标系xOy中直线l的参数方程为k为参数以原点O.为极点以x轴正半轴为极轴与直角坐标系xO
[选修4-4坐标系与参数方程]在直角坐标系xOy中直线l的参数方程为t为参数在极坐标系与直角坐标系x
在平面直角坐标系xOy中以O.为原点以x轴正半轴建立极坐标系曲线C.的极坐标方程为ρ2﹣4ρsinθ
在平面直角坐标系xOy中已知直线l的参数方程为t为参数圆C.的参数方程为θ为参数.若点P.是圆C.上
在平面直角坐标系xoy中圆C.的参数方程为t为参数.在极坐标系与平面直角坐标系xoy取相同的长度单位
在平面直角坐标系xOy中直线l的参数方程为t为参数曲线C.的参数方程为θ为参数.试求直线l和曲线C.
在直角坐标系xOy中直线l的参数方程为t为参数．在极坐标系中与直角坐标系xOy取相同的长度单位且以
在平面直角坐标系xOy中直线l的参数方程为t为参数曲线C.的参数方程为θ为参数.试求直线l和曲线C.
在直角坐标系xOy中直线l的参数方程为t为参数在极坐标系与直角坐标系xOy取相同的长度单位且以原点O
在直角坐标系xOy中直线l的参数方程为t为参数在极坐标系与直角坐标系xOy取相同的长度单位且以原点O
选修4﹣4坐标系与参数方程在直角坐标系xOy中直线l的参数方程为t为参数.在极坐标系与直角坐标系xO
在平面直角坐标系xOy中直线l的参数方程为t为参数P.Q.分别为直线l与x轴y轴的交点线段PQ的中点
已知直角坐标系xOy中直线l的参数方程为.以直角坐标系xOy中的原点O.为极点x轴的非负半轴为极轴圆
在平面直角坐标系xOy中直线l的参数方程为t为参数曲线C.的参数方程为θ为参数试求直线l与曲线C.的
在平面直角坐标系xoy中已知直线l的参数方程为参数t∈R.同时在以坐标原点为极点x轴的正半轴为极轴建
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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.
Thesciencecompetitionisagoodopportunitytoshowstudentscreativitycanaddnewvaluetotheirshcoollife. A.where B.whether C.how D.when
Thegirlwasthenhitasecondtimebyanothervananelderlytrashcollectorcametoheraidaccordingtosomewitnesses. A.before B.where C.until D.when
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