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在平面直角坐标系xOy中，曲线C的参数方程为，（θ为参数），以坐标原点O为极点，x轴正半轴为极轴建立极坐标系，已知直线l的极坐标方程为ρ（cosθ+sinθ）＝m（m＞0）． （1）求曲线C的极坐...
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高三上学期数学《》真题及答案
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在直角坐标系xOy中已知曲线C的参数方程是θ是参数若以O为极点x轴的正半轴为极轴取与直角坐标系中相同
在直角坐标系xOy中以原点O.为极点x轴的正半轴为极轴建立极坐标系.曲线C.1的参数方程为t为参数曲
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中直线m的参数方程为t为参数在以O.为极点射线Ox为极轴的极坐标系中曲线C.的
选修4-4坐标系与参数方程在平面直角坐标系xoy中已知曲线C1x2+y2=1以平面直角坐标系xoy的
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
在直角坐标系xOy中曲线C.1的参数方程为α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
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
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在直角坐标系xOy中曲线M.的参数方程为α为参数若以直角坐标系中的原点O.为极点x轴的正半轴为极轴建
在平面直角坐标系xOy中直线l的参数方程为t为参数.以坐标原点O.为极点x轴的正半轴为极轴建立极坐标
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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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如图一束光线从点A44出发经y轴上的点C反射后经过点B10则点C的坐标是
8分Breathewaveandsmile.Alongwithmorethan300otherseniorsImarchedintothestadiumontheafternoonofMay10.Theaudienceburstintodeafeningcheers.Thehugestadiumshookwithallthewhistlingandclapping. ItwasasifaHollywoodsuperstarhadwalkedonstage.Andindeedeverysingleseniorthatdaywasastarofthemoment.Eachdeservedit.Theseniorshadbeenpreparingforfouryearsforthisonce﹣in﹣a﹣lifetimemoment﹣thecommencement. SeatedIwaitedanxiouslyfortheopeningaddress.AsaforeignexchangestudentIwasnotabletoreceiveadiploma.HoweverIstillhadthewonderfulfeelingofbeingpartofthings.LiketheothergraduatesIwasdressedinpurplecapandgown. OurprincipalMr.Gloverdeliveredashortwarmgreeting.TheUSnationalanthemfollowedandthenhandsonchestsasolemnPledgeofAllegiance效忠宣誓. Studentswhohadexcelledacademicallygavefarewellspeeches.Thetearsinsomeeyesconvincedmethatmanyhaddeepfeelingsabouttheoccasion.ItwasastheclassmottosaysLifebringsustearssmilesandmemories.Thetearsdry;thesmilesfade;butthememorieslastforever. Thencamethecore核心ofthecommencement.Hundredsofnameswereannounced.Eachgraduatewalkedacrossthestagetoreceivehisorherdiplomafromtheprincipal.Fromthedifferentcheerseachgraduategotwehadthefunnysensethatitwasakindofcompetitionofwhocouldcheertheloudest. Tobehonestthepresentationofdiplomasgotboring.Agirlsittingnexttomeevenstartedyawning.Butitwasn'tboringforthosereceivingthediploma:theywouldtreasurethemomenttheprincipalplacedthesacredbrowndocumentintheirhandsfortherestoftheirlives. Anewpageinthebookofthatperson'slifehadturned.Theywereglimpsingtheirfutures:futuresofchallengehardshipperhapslonelinesstoowhichwouldtakealloftheircourage. 1.What'sthearticlemainlyabout? A.AnAmericangraduationceremony. B.Theopeningceremonyofasportsmeeting. C.Apresentationofcollegediplomas. D.AUScollege'sfarewellparty. 2.AccordingtothetextwhichofthefollowingstatementsabouttheauthorisTRUE? A.Hollywoodsuperstarswenttoattendtheceremony. B.Everysingleseniorbecameasuperstarattheceremony. C.Wheneachgraduategothisorherdiplomatherewerecheers. D.Allgraduateswouldtreasurethediplomafortherestoftheirlives. 3.Therightorderofthefollowingeventsis. a.Diplomaswerepresentedtograduates. b.Studentsgavefarewellspeeches. c.TheUSnationalanthemwasplayed. d.Theprincipalgaveashortwarmspeech. e.Seniorswentintothestadium. A.b﹣c﹣a﹣d﹣e B.b﹣d﹣c﹣e﹣a C.e﹣d﹣b﹣a﹣c D.e﹣d﹣c﹣b﹣a 4.Fromthetextwecaninferthat. A.foreignexchangestudentscouldgetadiploma B.adiplomaguaranteesabrightfuture C.theceremonysymbolizesthebeginningofanewstageinlife D.everyonefeltexcitedatthepresentationofthediploma
10分Youoftenfindsomebodywhoworksaroundyoucomplainingallthetimedon'tyou? 1About70%ofAmericanssaybeingaroundnonstopcomplainerssometimeshasabadinfluenceonthem.Luckilyhereare4tipstohelpformpositivepatterns. 1Self﹣awareness Whenanegativethoughtpopsintoyourmindimmediatelycorrectit.InsteadoftellingyourselfThat'saniceshirtbutIcan'tafforditchangethemessagetoThatwilllookgreatwithmyblackpantswhenIcanaffordit.2 Ofcourseeveryonecomplainssometimes.Butthelessfrequentlyyoucomplainthebetteryouwillfeel. 2Distanceyourself 3Excuseyourselfandgosomewherequietsomewhereoutdoorsinthefreshair.Thinkofsomethingpleasantbeforereturning.Youhavetotakethisseriouslybecausenegativepeoplecanandwillpullyouintothequicksand困境. 3Don'ttrytochangecomplainers Ifyoufindyourselftrappedinagroupofcomplainersinameetingoratasocialeventsimplychoosesilence.Lettheirwordsbounceoffyouwhileyouthinkofsomethingelse.Attemptingtostopthecomplainingcanmakeyouatarget.4IfsomeonesaysIhateMondaysweekendsaretooshorttrytothinkI'mgladIrestedupovertheweekendsoI'mreadytomakesomeimprovementonthatbigproject. 45 WhensomeoneisshoutingatyouangrilythrowtheresponsibilitybackatthembyaskingSowhatdoyouintendtodoaboutit?Inmostcasescomplainersdon'treallywantasolution.Theyjustwanttospeakthemout.Ifyoumakethemawarethattheythemselveshavetofindthesolutionstheywillleaveyoualoneandfindsomeoneelsetocomplainto.Ifsoyouwillbehappy. A.Findsolutions B.Changeresponsibility C.Youhavegotalotofcompany. D.Bydoingthisitwillleadtopositivebehaviors. E.Butyoucanredirectthediscussioninyourownmind. F.Wheneverpossibleescapefromnegativeconversations. G.Youwillneverknowwhattheyaregoingtotalkabout. 1. 2. 3. 4. 5.
已知关于xy的方程组的解满足x+y＝5则k的值为．
15分AsanoldEnglishsayinggoesHonestyisthebestpolicy.Itismorethananoldcliché陈词滥调but1goodwaytoliveyourlife. Firsthonestyisthe2easychoicethatwecanmake.Whenpeoplegetcaughtinliesitalwayscoststhemsomething.Manyrelationshipsaredestroyedbylies. Secondhonestygivesusmuch3free.Manypeoplebelievethatbeinghonestlimitstheminlifebutthatisnottrue.Soonerorlaterthosedishonestpeople4payapricefortheiracts;onthecontrarywhenwearehonestweare5truefree. Ifthereweretwopeople6standbeforeyouapersonwitharecordofbeinghonestandaperson7isknowntobedishonestwhowouldyoubemorelikely8believe?I'msuremostpeoplewouldsidewiththehonestperson.9weliveinthetruthorweliveinlies.Thetruthsetsusfreandliesleaveusinnothingbutmoretroubles.Honestyisachoicethatwemakeeachday.Thechoiceis10you.Whatwillyouchoose? 1. 2. 3. 4. 5. 6. 7. 8. 9. 10.
如图在△ABC中AD平分∠BAC交BC于点D∠B＝30°∠ADC＝70°则∠C的度数是
8分AlibabastartedtakingtheleadinChinabyconnectingbigChinesemanufacturerswithbigbuyersacrosstheworld.Itsbusiness﹣to﹣businesssiteAlibaba.comallowedbusinesstobuyalmosteverything.Alibaba'sadvantagewasn'thardtojudge:size.AlibabaisjustbigevenbyChinesestandards.Itsmarketattracts231millionactivebuyers8millionsellers11.3billionordersayear﹣andAlibabaisjustthemiddleman.Itencouragespeopletouseitsmarkets﹣notchargingsmallsellersapercentageofthesale. IfyouwantaquicklookintotheinfluenceofAlibabaondailyChineselifetakemyexperience.ImovedtoBeijingayearagoandquicklygottiredofvisitingsmallstoresacrossthecrowdedpollutedcityof20millionpeopleinsearchofnewelectronicsbathroomfurnishingsandanythingelsemywifewanted.Whatexactlyareyoulookingfor?Whynottryit?myChineseteacheraskedmeoneday.WiththatmywonderfulnewrelationshipwithAlibababegan. Alibaba'soriginalbusiness﹣to﹣businessmodelnowissecondtoconsumerbuying.Chineseretail零售buyingmakesup80%ofAlibaba'sprofitandleadingthatgroupisTaobaowith800millionitemsforsaleandthemostunbelievableselectionofthingsyou'lleverfind.TMall.comisAlibaba'sotherbigsitewhereyoucanfindbrandnamegoodsfromNikeandUnilevernearthelowestprices. WhatIhaveahardtimeexplainingtofriendsandfamilybackintheU.S.ishowChinahasgonebeyondtraditionalshopping﹣big﹣boxretailersespecially﹣infavorofonlinepurchasesonTaobaoandafewothersites.InsmallertownsthanBeijingwherebigretailershavenotyettraveledshoppingonlineisshoppingandshoppingisTaobao. IhavealistofsomeofmyrecentpurchasesonTaobaoforasenseofhowwidethemarketplaceis.Almosteverythingarrivedadayortwoafterorderingwithfreeshipping.I'mnotevenabigbuyerbecauseIneedfriendstohelpmesearchtheChinese﹣languagesite.WhenIwassearchingmypurchasehistoryonmyChineseteacher'siPadwhichhelpsmebuygoodsIlookedthroughwithgreatdifficultyabout10ofherpurchasesforeveryoneofmine. 1.Alibaba'sadvantagemainlyliesin. A.itsbusiness﹣to﹣businessservice B.itsbigsize C.itsnotchargingsmallsellers D.itslowprice 2.Whatcanwelearnfromtheunderlinedsentenceinthepassage? A.Alibabaisofmiddlesizeamongalltheonlinesites. B.Alibabawillcontinuetodevelop. C.Alibabaactsasabridgebetweenthebuyersandsellers. D.Alibabastandsoutasthebestonlinesite. 3.Whatcanbeinferredfromthepassage? A.Alibaba'sbusiness﹣to﹣businessserviceearnsmoremoneythanretail. B.Taobaohasnoobviousadvantageoverothersimilaronlinesites. C.TMall.comprovidesmoreprofitthanTaobao. D.Theauthor'sChineseteacherisalsoanonlinepurchaselover. 4.Whatisthepassagemainlyabout? A.ShoppingonlineinChinaisTaobao. B.Alibabainfluencespeople'sdailypurchaseinChina. C.Shoppingonlinegoesbeyondtraditionalshopping. D.HowtheauthorpurchasesonlineinChina.
8分Raisedinafatherlesshomemyfatherwasextremelytightfistedtowardsuschildren.Hisattitudedidn'tsoftenasIgrewintoadulthoodandwenttocollege.IhadtoridethebuswheneverIcamehome.ThoughthebusstoppedabouttwomilesfromhomeDadnevermetmeeveninseverweather.IfIgrumbledhe'dsayinhisloudestfather﹣voiceThat'swhatyourlegsarefor! Thewalkdidn'tbothermeasmuchasthefearofwalkingalonealongthehighwayandcountryroads.Ialsofeltlessthanvaluedthatmyfatherdidn'tseemconcernedaboutmysafety.Butthatfeelingwascanceledonespringevening. Ithadbeenaparticularlydifficultweekatcollegeafterlonghoursinlabs.Ilongedforhome.WhenthebusreachedthestopIsteppedoffanddraggedmysuitcasetobeginthelongjourneyhome. Arowofhedge树篱edgedthedrivewaythatclimbedthehilltoourhouse.OnceIhadturnedoffthehighwaytostartthelastlapofmyjourneyIalwayshadasenseofrelieftoseethehedgebecauseitmeantthatIwasalmosthome.OnthatparticulareveningthehedgehadjustcomeintoviewwhenIsawsomethinggraymovingalongthetopofthehedgemovingtowardthehouse.UponcloserobservationIrealizeditwasthetopofmyfather'shead.ThenIkneweachtimeI'dcomehomehehadstoodbehindthehedgewatchinguntilheknewIhadarrivedsafely.Iswallowedhardagainstthetears.Hedidcareafterall. Onlatervisitsthatspotofgraybecamemywatchtower.IcouldhardlywaituntilIwascloseenoughtowatchforitssecretmovementabovethegreenery.UponreachinghomeIwouldfindmyfathersittinginnocentlyinhischair.So!Mysonit'syou!he'dsayhisfacelengtheningintopretendedsurprise. IrepliedYesDadit'sme.I'mhome. 1.WhatdoestheunderlinedwordgrumbledinParagraph1probablymean? A.Acceptedhappily. B.Explainedclearly. C.Agreedwillingly. D.Spokeunhappily. 2.Whatmadetheauthorfeelupsetwas. A.thetirednessafterlonghoursinlabs B.thefearofseeingsomethingmoving C.thefeelingofbeinglessthanvalued D.thelonelinessofridingthebushome 3.Theauthor'sfatherwatchedbehindthehedgebecause. A.hewasconcernedabouthisson'ssafety B.hewantedtohelphissonbuildupcourage C.hedidn'twanttomeethissonatthedoorway D.hedidn'tthinkhissonwasoldenoughtowalkalone 4.Whichofthefollowingcanbethebesttitleforthetext? A.MyFather'sSecret. B.MyCollegeLife. C.TerribleJourneyHome. D.RidingBusAlone.
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