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已知直线l的参数方程为（t为参数），曲线C的极坐标方程为ρsin2θ﹣16cosθ＝0，直线l与曲线C交于A，B两点，点P（1，3）， （1）求直线l的普通方程与曲线C的直角坐标方程； （2）求...
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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
已知极坐标的极点在直角坐标系的原点处极轴与x轴非负半轴重合直线l的参数方程为t为参数曲线C.的极坐标
已知在平面直角坐标系xOy中直线l的参数方程是t是参数以原点O.为极点x轴正半轴为极轴建立极坐标曲线
已知曲线C.的参数方程为α为参数直线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
已知曲线C.的极坐标方程为ρ=4cosθ以极点为原点极轴为x轴的正半轴建立平面直角坐标系设直线l的参
已知曲线C.的参数方程为t为参数C.在点11处的切线为l以坐标原点为极点x轴的正半轴为极轴建立极坐标
在平面直角坐标系中直线的参数方程为其中t为参数.现以坐标原点为极点x轴的正半轴为极轴建立极坐标系已知
已知曲线C.的极坐标方程是ρ=2sinθ设直线l的参数方程是t为参数.1将曲线C.的极坐标方程转化为
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
已知直线L.的参数方程为t为参数以原点O.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
已知直线l的参数方程是t为参数曲线C的极坐标方程是ρ=8cosθ+6sinθ则曲线C上到直线l的距离
已知极点与坐标原点重合极轴与x轴非负半轴重合两个坐标系单位长度相同已知直线lt为参数曲线C.的极坐标
已知直线l的参数方程为t为参数0≤φ＜π以坐标原点O.为极点x轴的正半轴为极轴建立极坐标系曲线C.的
已知在平面直角坐标系xOy中以坐标原点O.为极点以x轴正半轴为极轴建立极坐标系曲线C1的极坐标方程为
在直角坐标系xOy中过点P.21的直线l的参数方程为t为参数以坐标原点为极点x轴正半轴为极轴建立极坐
已知极坐标的极点在直角坐标系的原点处极轴与x轴非负半轴重合直线l的参数方程为t为参数曲线C.的极坐标
在平面直角坐标中以坐标原点为极点x轴的正半轴为极轴建立极坐标系已知曲线C.的极坐标方程为直线l的参数
已知曲线C.的极坐标方程为ρ＝4cosθ以极点为原点极轴为x轴正半轴建立平面直角坐标系设直线l的参数
已知曲线C.的参数方程为t为参数C.在点11处的切线为l以坐标原点为极点x轴的正半轴为极轴建立极坐标
已知曲线C.的极坐标方程是ρ=6cosθ以极点为平面直角坐标系的原点极轴为x轴的正半轴建立平面直角坐
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IsFreshAirReallyGoodforYou? Weallgrewuphearingpeopletellustogooutandgetsomefreshair.1AccordingtorecentstudiestheanswerisabigYESiftheairqualityinyourcampingareaisgood. 2Iftheairyou'rebreathingisclean﹣whichitwouldbeifyou'reawayfromthesmogofcities﹣thentheairisfilledwithlife﹣givingenergizingoxygen.Ifyouexerciseoutofdoorsyourbodywilllearntobreathemoredeeplyallowingevenmoreoxygentogettoyourmuscles肌肉andyourbrain. Recentlypeoplehavebegunstudyingtheconnectionbetweenthenaturalworldandhealing治愈.3Intheseplacespatientscangotobenearnatureduringtheirrecovery.Itturnsoutthatjustlookingatgreengrowingthingscanreducestresslowerbloodpressureandputpeopleintoabettermood情绪.Greeneryisgoodforus.HospitalpatientsWhoseetreebranchesouttheirwindowarelikelytorecoveratafasterratethanpatientswhoseebuildingsorskyinstead.4Itgivesusagreatfeelingofpeace. 5Whilethesun'srayscanageandharmourskintheyalsogiveisbeneficialVitaminD.TomakesureyougetenoughVitaminD﹣butstillprotectyourskin﹣putonsunscreenrightasyouheadoutside.Ittakessunscreenaboutfifteenminutestostartworkingandthat'splentyoftimeforyourskintoabsorbaday'sworthofVitaminD. A.Freshaircleansourlungs. B.Sowhatareyouwaitingfor? C.Beinginnaturerefreshesus. D.Anothersidebenefitofgettingfreshairissunlight. E.Butisfreshairreallyasgoodforyouasyourmotheralwayssaid? F.Justasimportantlywetendtoassociateairwithhealthcare. G.AllacrossthecountryrecoverycentershavebegunbuildingHealingGardens.
Allchildrenshouldgetaccesstoahigh﹣qualityeducationtheirracezipcodeorfamilyincome. A.dueto B.regardlessof C.apartfrom D.dependingon
1Inwhichrestaurantcanyouhaveamealwithpeacefulcountrysurroundings?A.CHANGTOMTHAIRESTAURANTANDHOTELB.JACK'STRADITIONALANDAMERICANRESTAURANTC.MOGHULEXPRESSINDIANTAKEAWAYD.THEMARINARESTAURANT2Itcanbeconcludedthat.A.youcanenjoythefreshestlocalproduceinCHANGTOMTHAIRESTAURANTANDHOTELB.JACK'STRADITIONALANDAMERICANRESTAURANTsatisfiesalldifferenttastesC.youcanhaveyourorderdeliveredinMOGHULEXPRESSINDIANTAKEAWAYforanextrafeeD.THEMARINARESTAURANTprovidesthebestaccommodationofthefourrestaurants
﹣ThesewinterdaysaregettingtobemorethanIcantake. ﹣Holdon.Accordingtotheweatherreportpeoplehavesomereliefbytheendoftheweek. A.would B.should C.need D.shall
IamimpressedwithChina'scommitmenttoitsclimategoalsevidencedbythefactwearesureofChinahasmetits2020targetsthreeyearsaheadofschedule. A.that B.which C.what D.where
NeedaJobThisSummer?Theprovincialgovernmentanditspartnersoffermanyprogramstohelpstudentsfindsummerjobs.Thedeadlinesandwhatyouneedtoapplydependontheprogram.Notastudent?Gotothegovernmentwebsitetolearnaboutprogramsandonlinetoolsavailabletohelppeopleunder30buildskillsfindajoborstartbusinessesallyearround.JobsforYouthIfyouareateenagerlivingincertainpartsoftheprovinceyoucouldbeeligible符合条件forthisprogramWhichprovideseightweeksofpaidemploymentalongwithtraining.Whoiseligible:Youth15﹣18yearsoldinselectcommunities社区.SummerCompanySummerCompanyprovidesstudentswithhands﹣onbusinesstrainingandawardsofupto$3000tostartandruntheirownsummerbusinesses.Whoiseligible:Studentsaged15﹣29returningtoschoolinthefall.StewardshipYouthRangerProgramYoucouldapplytobeaStewardshipYouthRangerandworkonlocalnaturalresourcemanagementprojectsforeightweeksthissummer.Whoiseligible:Studentsaged16or17attimeofhirebutnotturning18beforeDecember31thisyear.SummerEmploymentOpportunities机会ThroughtheSummerEmploymentOpportunitiesprogramstudentsarehiredeachyearinavarietyofsummerpositionsacrosstheProvincialPublicServiceitsrelatedagenciesandcommunitygroups.Whoiseligible:Studentsaged15orolder.Somepositionsrequirestudentstobe15to24orupto29forpersonswithadisability.1WhatisspecialaboutSummerCompany?A.Itrequiresnotrainingbeforeemployment.B.Itprovidesawardsforrunningnewbusinesses.C.Itallowsonetoworkinthenaturalenvironment.D.Itoffersmoresummerjobopportunities.2WhatistheagerangerequiredbyStewardshipYouthRangerProgram?A.15﹣18.B.15﹣24.C.15﹣29.D.16﹣17.3Whichprogramfavorsthedisabled?A.JobsforYouth.B.SummerCompany.C.StewardshipYouthRangerProgram.D.SummerEmploymentOpportunities.
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