首页
试卷库
试题库
当前位置：
X题卡
>
所有题目
>
题目详情
如图所示，在平面直角坐标系xoy中，一组同心圆的圆心为坐标原点O，它们的半径分别为1，2，3，…，按照“加1”依次递增；一组平行线，l0，l1，l2，l3，…都与x轴垂直，相邻两直线的间距为l，其中...
查看本题答案
包含此试题的试卷
教案备课库《》真题及答案
点击查看
你可能感兴趣的试题
在平面直角坐标系中圆的方程是X—30²+Y—25²=15²此圆的圆心坐标为
（30， 25）
（—30， —25）
（900， 625）
（—900， —625）
在平面直角坐标系xOy中圆C的方程为x﹣42+y2=1若直线y=kx﹣3上至少存在一点使得以该点为圆
在平面直角坐标系xOy中以原点O为圆心的圆过点A130直线y=kx﹣3k+4与⊙O交于B.C两点则弦
如图所示在平面直角坐标系xOy中半径为2的⊙P.的圆心P.的坐标为-30将⊙P.沿x轴正方向平移使⊙
有下列叙述①在空间直角坐标系中在x轴上的点的坐标一定可记为0bc②在空间直角坐标系中在y轴上的点的坐
如图所示在平面直角坐标系xOy中角α的终边与单位圆交于点A.点A.的纵坐标为则cosα＝____.
如图所示在平面直角坐标系xOy中角α的终边与单位圆交于点A.点A.的纵坐标为则cosα＝______
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中以点10为圆心且与直线2mx﹣y﹣4m+1=0m∈R.相切的所有圆中半径最
如图在平面直角坐标系xOy中一单位圆的圆心的初始位置在01此时圆上一点P.的位置在00圆在x轴上沿正
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
如图在平面直角坐标系xOy中点A03直线l:y=2x-4设圆C的半径为1圆心在l上 若
如图在平面直角坐标系xOy中△
′
′
在平面直角坐标系xOy中以点10为圆心且与直线mx-y-2m-1=0m∈R.相切的所有圆中半径最大的
在平面直角坐标系xOy中经过点sin45°cos30°的直线与以原点为圆心2为半径的圆的位置关系是
相交
相切
相离
以上三者都有可能
在平面直角坐标系xOy中圆M.x－a2＋y＋a－32＝1a＞0点N.为圆M.上任意一点.若以N.为圆
如图一圆弧过方格的格点A.B.C.试在方格中建立平面直角坐标系使点A.的坐标为-24则该圆弧所在圆的
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
热门试题
更多
ChangeyourlifearoundinfoureasystepsChangeyourwayofthinkingYourhomeenvironmenthasnodoubtinstilled灌输certainexpectationsinyouabouthowyourlifeshoulddevelop.1.dependingonyourbackground.Tochangeyourlifearoundstartbyshakingoffsuchexpectationsandsettingyourselfsomenewgoals.2Askyourselfwhatyoureallywantoutoflife.Makealistofideasaboutyourcareermoneypeopleyoulovethingsyou'dliketodoetc.Studyitsoastodecidewhichthreeitemsarethemostimportanttoyou.3.It'sunrealistictoimaginedoingso.Butbyconsciouslychoosingthreespecificgoalsyouwillbeamazedathowmuchmorefocusedanddeterminedyoufeel.OvercomeyourdoubtsConfidenceiseverything.Allthesameacertainamountoffearanduncertaintyisnatural.4.andremainfocusedonyourgoal.Althoughyoumaybeshakingontheinsideshowoutwardconfidenceandbelieveinyourself.Learntovieweveryobstacleasachance.Ifatfirstyoudon'tsucceed﹣﹣Weareallafraidoffailing.Bethatasitmayfailureisanimportantpartofsuccessandyouneedtoholdontothatfactandseesetbacksassteppingstonestowardsyourfinalgoal.5.youshoulduseyourmistakesaslearningtoolsandmoveon.A.LimityourtimeB.PracticehidingitC.FocusyoureffortsD.DifficultthoughitmayseematthetimeE.HoweverthesemaylimityouorbemisleadingF.Rememberit'snevertoolatetolearnsomethingnewG.Howevermuchyou'dliketoachieveeverythingonyourlist
Istillkeepthephototakenbymymomandtreasureitasmylife.ThatwasmanyyearsagowhenIwastakingsummer1incollegeandwasmovingintoanapartment.Iwascarryingtwo2witheverythingthatIwasgoingtoneedto3the6weeksofclasses.ItisthelasttimeIcanrememberevertravelingthat4.Sincethenmypossessionshave5.Thoughmostofthemlikemyfurnitureare6thereareoccasionswhenIfeel7downbyallofthem.IamsurethatIwillneedtwotrucksratherthantwosuitcasesifIever8again.Onethoughthoweverbringsme9.ItistheknowledgethatwhenImakemy10journeyfromthisworld﹣IamdeadIwon't11anyofthosethingswithme.TheonlythingsIwilltakewithmewillbewhatIhavepackedinthesuitcaseofmy12.Iwillbecarryingwithmeevery13thingIeverdideverylovingthoughtIeversharedandeverybitof14Ieverbroughtintothisworldtomakeotherslaugh.IwillbecarryingallthegoodnessIgavetoothersallthe15Iwasabletoshare?andallthejoyIcreated.Thesethingswon'tbeweighingmedown.InsteadIwillbesurely16.Asyouare17foryourownfinaltrip﹣completelypreparedmakesurethatyoushouldnotmakeyour18heavy.Makesurethatthebelongingsinyourhome19takesecondplacetotheloveinyourheart.Whenyou20itinHeavenGodandallHisangelswillsmile.1A.journeys B.holidays C.lectures D.classes2A.trucks B.suitcases C.books D.computers3A.bringout B.takeaway C.getthrough D.payfor4A.hard B.light C.unforgettably D.happily5A.gone B.appeared C.lessened D.grown6A.expensive B.useful C.beautiful D.enjoyable7A.weighed B.put C.turned D.calmed8A.treasure B.possess C.move D.demand9A.confusion B.matter C.hate D.comfort10A.final B.pleasant C.tiring D.latest11A.compare B.take C.fill D.stand12A.soul B.body C.home D.college13A.strange B.little C.kind D.smart14A.knowledge B.hope C.thought D.laughter15A.love B.information C.time D.money16A.burstout B.wornout C.givenup D.liftedup17A.ready B.eager C.fit D.responsible18A.world B.weight C.travel D.heart19A.hardly B.always C.rather D.never20A.cover B.wrap C.unpack D.untie
SmallincreasesintemperaturefoundtoaddpowertostormsintheAtlantic.HurricanesthatformintheAtlanticOceanareexpectedtogainconsiderablestrengthastheglobaltemperaturecontinuestoriseanewstudyhasfound.UsingmodelingdatafocusedontheconditionsinwhichhurricanesformagroupofinternationalresearchersbasedatBeijingNormalUniversityfoundthatforevery1.8°F1℃riseoftheEarth'stemperaturethenumberofhurricanesintheAtlanticthatareasstrongorstrongerthanHurricaneKatrinawillincreasetwofoldtosevenfold.Hurricanestrengthisdirectlyrelatedtotheheatofthewaterwherethestormforms.Morewatervaporintheairfromevaporatingoceanwateraddsfueltohurricanesthatbuildstrengthandheadtowardland.HurricaneKatrinaiswidelyconsideredthemeasureforadestructivestormholdingthemaximumCategory5designationforafull24hoursinlateAugust2005.ItloststrengthasitpassedovertheFloridapeninsulabutgaineddestructivepowerfightbeforecollidingwithNewOrleanskillingmorethan200peopleandcausing﹩80billionindamage.ThestudypointstoagradualincreaseofKatrina﹣likeevents.Thewarmingexperiencedoverthe20thcenturydoubledthenumberofsuchdebilitating将人类摧垮的storms.Buttheongoingwarmingoftheplanetintothe21stcenturycouldincreasethefrequencyoftheworstkindsofstormsby700percentthreateningcoastlinesalongtheAtlanticOceanwithmuitipleCategory5stormseveryyear.'Ourresultssupporttheideathatchangesinregionalseasurfacetemperaturesistheprimarycauseofhurricanevariability'saidAslakGirnsteadaresearcherwiththeCenterforIceandClimateattheUniversityofCopenhagen.Thelargeimpactofsmallsea﹣surfacetemperatureincreaseswasmorethanGirusteadandhiscolleagueshadanticipated.TheentirestudywaspublishedintheProceedingsoftheNationalAcademyofSciences.Globaltemperatureshavesteadilyincreasedmakingthepastdecadethewarmestonrecord.EarlierthisyearclimateresearchersreportedthattheEarth'stemperatureshaverisenfasterinthelastcenturythanatanypointsincethelasticeage11300yearsago.Theprimarycauseacouseususofscientistshassaidistherisingemissionsofgreenhousegaseslikecarbondioxideandmethane.Pasthurricaneshavesupportedthestudy'sfindingthatglobaltemperatureriseislinkedtomoredestructivestorms.AccordingtotheNationalCenterforAtmosphericResearchwhilethefrequencyofstormsdoesn'tappeartohaveincreasedthepercentageofstrongoneshasrisensharplyoverthepastfewdecades.Thetrendmaybesimilarfurtherbackintimebutcomprehensivehurricanedatadoesn'texist.1AccordingtotheteamofinternationalresearchersbasedatBeijingNormalUniversitytheriseoftheEarth'stemperatureislikelytocause.A.thecomingoficeageB.lessintensehurricanesC.moreKatrina﹣likeorworsehurricanesD.moregreenhousegasesintheatmosphere2Theoceanwaterintheregionwherethestormforms.A.isheatingthehurricanesB.evaporatesandbecomesfuelC.headstowardlandD.turnsintowatervaporthatmakeshurricanesstronger3Whatresultcanregionalseasurfacetemperaturechangesproduce?A.Hurricanechanges.B.Increasinggreenhousegasemissions.C.Globalwarming.D.Destructivehurricanes.4Itcanbeinferredfromthepassagethat.A.thereisnolinkbetweengreenhousegasemissionsanddestructivestormsB.reductionofgreenhousegasemissionsmayreducedestructivestormsC.thehigherpercentageofstrongonesroseasmorehurricanesappearedD.pastrecordsonhurricanesincludedeverythingneeded
Asmallstudyofprofessionalsoccerplayersfoundthateventhosewhohaveneverexperiencedaconcussion脑震荡stillhavechangesinthewhitematteroftheirbrainsprobablyfromroutineandunprotectedheaders头球.Thebrain'swhitematterismadeupofnervesandtheirmyelin髓磷脂protectivecoatingthatplayanimportantroleinconnectingbrainareasandsettingupnervousnetworks.PreviousstudieshaveinvestigatedhowconcussionsleadtochangesinthiswhitematterbutanewstudyledbyDr.IngaK.KoerteofHarvardMedicalSchoolinBostonisoneofthefirsttolookathowevenblowstotheheadthataren'tconsideredconcussionsmayleadtobraininjury.InthestudytheresearcherscomparedbrainscansoftwelvemalesoccerplayersfromGermantop﹣levelsoccerclubswhohadnotexperiencedaconcussiontobrainscansofelevencompetitiveswimmerswhohadsimilarlyneverexperiencedrepetitivebraininjury.TheresearchteamuseddiffusiontensorimagingDTIwhichishighlyeffectiveatcatchingwhitematterchanges.Theresearchersfoundsurprisingchangesinthewhitematter.Eventhoughtheplayershadnoconcussionstheirbrainstoldadifferentstoryofdamageincludingchangestothemyelincoatingsurroundingnerves.'Althoughourstudyissmallitisthefirsttolookatsoccerplayerswithnosymptomsofconcussions'saysKoerte.'Wethinkitisanimportantfindingnotjustforsoccerplayersbutotherathletesofothersportstoo.''Ifplayersaredamagingtheirbrainsitisalargepublichealthissuebecauseeveryoneevenatayoungagehitstheirheadlikethis'saysDr.JeffreyBazariananassociateprofessorofemergencymedicineatauniversity.HewasnotinvolvedwiththestudybuthasalsousedDTItoassessmildbraininjuryinhighschoolfootballandhockeyplayers.Koertesaysmoreresearchisneededtogetabetterideaofhowpotentiallydamagingheadinjurycanbeatyoungages.IfitturnsoutrepetitiveheadblowsareharmingbrainfunctionsKoertesaysregulationslikestoppingplayingafterafixednumberofhitsmaybeneeded.Orheadingshouldn'tbeallowedatalluntilacertainage.ThestudyispublishedintheJournaloftheAmericanMeclicalAssociationJAMA.1Accordingtothestudysoccerplayersarelikelytobethreatenedby.A.sportsinjuriesB.routineheadersC.mildconcussionsD.fiercecompetition2Thestudyexplorestheconnectionbetween.A.concussionsandthewhitematterB.repetitiveheadblowsandbraininjuryC.thewhitematterandnervousnetworksD.nervesandtheirmyelinprotectivecoating3Howmanyplayerstookpartinthestudy?A.Eleven.B.Twelve.C.Twenty﹣three.D.Twenty﹣four4Dr.Bazarianseemstofeelthefindingsofthestudymaybe.A.importantB.interestingC.incorrectD.conflicting
Havingbattledwiththeiroverwhethertoofferhelptoanagedmanorwomanwhohasfallenovermostpeoplechoosetohelp. A.compromise B.contradiction C.conscience D.competence
Wecompletedonethirdoftheprojectandtheloaninplacewehadtodelaytheresttillthenextmonth. A.notarranged B.wasnotarranged C.notarranging D.hadnotbeenarranged
WeofferedtopayourhalfofthecostthatwasneededtorestoretheshareddoorwaybutCharleswouldhaveofit. A.nothing B.anything C.none D.any
假定你是高三学子李华在离高考还有一个月之际你给校报英语天地投稿给本校高三学生写一封建议信对考前一个月的英语学习生活等提出自己的建议.内容包括: 1学习方法心态调整; 2生活作息规律; 3表达祝福 注意:1.词数100左右;2.可以适当增加细节以使行文连贯. Deareditor AsaseniorofhighschoolIfindmanyofmyfellowstudentsarestressedandworriedabouttheirEnglishwhilepreparingforthecomingCollegeEntranceExamination. ThereforeI'dliketogivethemsomeadvice. Yours LiHua
Youngcoupleswillbehappytoseetheirbabieswithgoodhealthandintelligencewhentheyareborn. A.tobless B.blessing C.blessed D.beingblessed
下列化学方程式中不能正确表达反应颜色变化的是
假定英语课上老师要求同桌之间交换修改作文请你修改你同桌写的以下作文.文中共有10处语言错误每句中最多有两处.每处错误仅涉及一个单词的增加删除或修改. 增加:在缺词处加一个漏字符号∧并在其下面写出该加的词. 删除:把多余的词用斜线\划掉. 修改:在错的词下划一横线并在该词下面写出修改后的词. 注意: 1.每处错误及其修改均仅限一词; 2.只允许修改l0处多者从第11处起不计分. DearLiMei Withthemidtermexamcomeyoumustgetpreparedforit.Inmyopinionthatyouneedisarightstudymethod.Asweallknowtherearethreestageinstudy﹣previewstudyinclassandreviewamongthemreviewisthemostimportant.Youshouldfirstmakereviewplanandthensticktoit. Ifollowmyreviewplanstrictlyandhadmadeprogress.Itturnsouttobewellenough.Ofcoursetherearemanywaystoreview.SolongasyoureviewregularI'msurethatIcanfindmorewaystostudywell. IfyouhaveanyquestionsyoumayaskmeandI'mgladtohelpyou.WecanmeetinourschoollibraryineveryFridayafternoon. Bestregards. Yours LiHua
VioletteChilde67isadiningcompanionwhohelpsservepatientslunches.Therolewasintroducedtenyearsagobyadietitianconcerningthatsomepatientswerenoteatingtheirmeals.'Manyofourpatientsareelderlyandcanbeconfusedbythenoisybusyenvironmentofthehospitalandsowon'tfocusoneating'explainsYvonneDouglas﹣Morrisheadofvolunteeringwhooverseestheactivitiesofall528ofthetrustyvolunteers.'Staffarebusywiththeclinicalsideofthingssothediningcompanionswereintroduced.Theywillassistthepatientsandencouragethemtoeat'Violettearetiredlibrarymanagerhasbeenhelpingoutforsixyears.'Itmakesmefeelabitmorecomplete'shesayssimply.'Helpingwiththemealsfreesupthenursestogetonwithotherthings.Ibelieveinbeingapartofthecommunityandthishospitalispartofmycommunity.'Anotherkeyroleisplayedbythedischargevolunteerswhooffersupporttotheelderlyespeciallythoseaged70andover﹣﹣leavinghospitaltoreturntoanemptyhome.Theteamhasabudgetof£10perpersonandwillpoptotheshopsandbuymilkbreadandamealtotidethemoverforthefirstfewhours.Theythencallthepatients他ularlyforaslongastheyneedtocheckhowtheyaregettingonandiftheyneedextrasupport.ThevolunteersinKingstonworkfromadedicatedoffice﹣asmallroominoneofthebuildingsonthehospitalgroundswhereaChristmastreedecoratedwithbaubles小饰物bearingthefacesofvolunteerssitsinthecomer.'Allthevolunteerscomeandgatherhereitgetsverybusyattimes'smilesNicolaHutin*67adischargesupportvolunteer.Amotheroftwoandgrandmotheroffourshewasamembershipcoordinator协调员foratradeassociationuntilsheretiredandhassincevolunteeredatthehospitalonemorningaweekfor18months.1Whatcanwelearnaboutdiningcompanions?A.Theirworkingconditionsarenoisy.B.Theyaregreatassistantsfordoctors.C.Theyoftenmakepatientsmorenervous.D.Theoccupationexistedmorethantenyearsago.2WhatdoesViolettethinkofherwork?A.Shefindsittiringandboring.B.Shefindsiteasytocompleteherwork.C.Shebelievesitgivesherasenseofbelonging.D.Shebelieveshelpingpatientswithtnealsistofreeupthecommunity.3Whatdoesadischargevolunteerdoforthepatients?A.Raisemoneyfortheelderly.B.Payavisittothemathome.C.Buydailynecessitiesforthem.D.Ringtochecktheirhealthcondition.4Whichofthefollowingcanbestdescribethethemeofthetext?A.Itisnevertoooldtolearn.B.Manyhandsmakelightwork.C.Healthisbetterthanwealth.D.Godhelpsthosewhohelpthemselves.
假定你是李华你校学生会创办的你最喜爱的英语月报EnglishMonthly向读者征集意见.请你给主编写封邮件内容包括: 1.自我介绍; 2.说明该报优点:内容丰富;指导英语学习; 3.提出建议:多介绍中国传统文化及励志故事. 注意: 1.词数100左右; 2.可以适当增加细节以使行文连贯.
Moreandmorepeopleprefertoliveinthecountrysideappealforthemliesinthequietandslow﹣pacedlife. A.who B.which C.whose D.what
近年来我国科学家发现了一系列意义重大的铁系超导材料其中一类为Fe﹣Sm﹣As﹣F﹣O组成的化合物．回答下列问题 1元素As与N同族．预测As的氢化物分子的立体结构为其沸点比NH3的填“高”或“低”其判断理由是． 2Fe成为阳离子时首先失去轨道电子Sm的价层电子排布式4f66s2Sm3+价层电子排布式为． 3比较离子半径F﹣O2﹣填“大于”“等于”或“小于”． 4一种四方结构的超导化合物的晶胞如图1所示．晶胞中Sm和As原子的投影位置如图2所示． 图中F﹣和O2﹣共同占据晶胞的上下底面位置若两者的比例依次用x和1﹣x代表则该化合物的化学式表示为通过测定密度ρ和晶胞参数可以计算该物质的x值完成它们关系表达式ρ＝g•cm﹣3． 以晶胞参数为单位长度建立的坐标系可以表示晶胞中各原子的位置称作原子分数坐标例如图1中原子1的坐标为则原子2和3的坐标分别为．
WantawonderfultravelinLondon?Don'tmissthefollowing!CartoonMuseumThishighlyentertainingLondontouristattractioncoversthehistoryanddevelopmentofBritishcartoonsfromthe18thcenturytothepresentday.Youcanfindadetailedcollectionofalltypesofcartoonsinthismuseumincludingcaricatures讽刺漫画andrareexamplesofcartoonart;it'sanidealplacetoentertainkidsofallagesaswellasaseriouscollectionforanimationenthusiasts.Thereareoverninehundredpiecesonexhibitandthemuseumregularlyholdseventswherebothchildrenandadultscanparticipate.BookingfortheseeventsisrecommendedduetothepopularityyearroundofthisLondonMuseum.Telephone:02075808155ChislehurstCavesChislehurstinLondonishometochalkcavesthatwereminedbyhandforover8000years.AtourofthesecavesisanexcitingwaytoseehowBritishpeoplehaveimpactedontheirenvironmentoverthousandsofyears.Telephone:02084673264TheOldOperatingTheatreMuseumTheOldOperatingTheatreMuseumisoneLondonmuseumofferingafascinatinginsightintothemedicalprofessionofthepast.This300﹣yearoldherbgarret阁楼isBritain'sonlysurvivingoperatingtheatrewithawoodenoperatingtableandanobservationstandfromwhichvisitorscanwitnesssurgeryperformed.Telephone:02071882679CurzonMayfairCinanaMuseumRecentlyvotedoneofLondon'sbestcinemasbyTimeOutreaderstheCurzonMayfaircinemaiseverythingyouwouldexpectfromthisparticularpartoftown:luxurious奢华的andtasteful.Showingmostlyart﹣houseandindependentfilms.theCurzonMayfairisuniqueintheworldofLondoncinemaforitsroleinscreeningthesefilmsforindustryandpress.Telephones033332101041WhatcanwelearnfromtheCartoonMuseum?A.Itisdesignedonlyforkids.B.ItistheoldestcartoonmuseuminBritain.C.Visitorscantakepartintheactivitiesheldinit.D.Onemustbookthemuseuminadvancetovisitit.2Whichwillyoucallupifyou'dliketoknowsurgeryofthepast?A.02075808155・B.02071882679.C.03333210104.D.02084673264.3Whichofthefollowingmayattractanaturelover?A.ChislehurstCaves.B.CartoonMuseum.C.CurzonMayfairCinemaMuseum.D.TheOldOperatingTheatreMuseum.
Visuallanguageisaformofcommunicationthatusesvisualelements元素asopposedtoformalwrittenlanguagetoconveymeaningoranideaGraphicacytheabilitytocommunicatevisuallyisconsideredasimportantasliteracyandnumeracytheabilitiestoreadandcount.Somepeoplearevisualthinkersusingthatpartofthebrainthatisemotionalandcreativetoprocessandgivemeaningtoinformation.Visualcommunicationcanfindexpressioninpaintingsdrawingssymbolsorsimplylinesandshapesarrangedforaspecificeffect.Artisanexampleofvisuallanguage.Apaintingorsculpturecanconveyideasorarousespecifickindsofemotionalresponses.Itmayalsoexpressideasabouthistoricaleventsabstractconceptsorsimplybeaboutthewaycertainshapesorforms'work'togetherorcreateacertaineffectonthemind.Someresearchersbelievethatdifferentpartsofthebrainrespondinuniquewaystocolorsandshapes.Pictograms象形文字andideograms表意文字aretypesofvisuallanguage.Pictogramsarepicturesthataresimilartowhattheyrepresent.Theyarestillusedtodaytocommunicateinformation.Manypeoplearoundtheworldarefamiliarwiththepictogramsindicatingsuchthingsasairportspublicfacilitiesandnon﹣smokingareasindicatedbyacigaretteinacirclewithalineacrossit.Ideogramsarepicturesthatrepresentideasandcanoftenbeunderstoodwithouttheaidofwrittenlanguage.SomescholarstrackmodernalphabetstopicturesLettersareactuallyancientpicturesandwordsareaseriesofpictures.Modernalphabetlettersarenotonlyphonetic语音的symbolsbutarebasedonancientreligiousimagesandsymbols.Musivisualcommunicationisalsoapartofvisuallanguage.Thetermreferstomusiccreatedspecificallytoimprovethevisualexperienceoffilm.Itcorrespondstotheimagesbeingseenonthescreenandthemusicmayarouseasenseofterrorfearorotheremotions.Mostmoviegoersunderstandthelanguageofmusicalcluesshowingthatsomethingdramaticorimportantisabouttohappen.1Whatisvisuallanguageaccordingtothetext?A.Anideaconveyedbyartists.B.Anabilitytoreadandcount.C.Asystemusedtoarouseemotions.D.Awayofprocessingandexpressinginformation.2Whatmaybetheoriginofthemodernalphabetletters?A.Publicfacilities.B.Imaginarylines.C.Religiousimages.D.Livingconditions.3Whatcanwelearnaboutthemusicofafilmfromthelastparagraph?A.Itcanhelppredicttheplot.B.Avisualthinkercanmakeitbetter.C.Itoftenchangeswithouttheaudience'snoticeD.Itmakesthefilmmoreemotionalandcomplex.4Whatcanbethebesttitleofthetext?A.HowdoesVisualLanguageAffectLife?B.HowcanWeLearnVisualLanguage?C.WhatIstheOriginofLanguage?D.WhatIsVisualLanguage?
FormepersonallyIcouldwritefordaysaboutmanydifferentsituationswhereadversity逆境1mylife.NowletmetellyouoneexperiencewhereIalmostletadversity2.Wehadaglassstudiowhichwaslocated50feetfromourhome.Acoupleofyearsagoweexperiencedan3winter;wehadalotofsnowandice.The4oftheiceandsnow5theroofonourstudiotakingwithitoneofoursourcesofincome.6itdidfalldownwegotontheroofandtriedto7thesnowandicebutwhenyouhave5feetoficeandtemperaturesofminus20Celsiusitwaspretty8todo.Wehadapartnercomeintohelpustryto9theroofbysupporting.Intheendtherewas10thatcouldbedone.Theroofcamedown.Wehadmovedalotofourgoodsandtoolsfromthestudio11welostalotalso:glasskilnsworkbenchestonameonlyafewoftheitems.Itwasa12experience.Herewewereinthemiddleofwinterwithourstudiocollapsed.Wecouldn'tworkaswehadalmost13allthematerialsinabuildingwewerenotusing.Wecouldhavedoneoneofthetwothings:wecouldsimplysaythatwecannolonger14ourglassbusiness.Letmetellyouthatthiswascertainlythoughtthat15ourmind.Orwecouldfindawaytogetourstudiobackupandrunning.Wepickedthe16option.Wehadalargebarnthatwewerenotusing.Sowerenovated翻新thebarn17ourworkingareaandtodaywehaveanicerstudiothanwe18had.Iftheadversitywewere19hadnothappenedweprobablywould20beworkingintheoldstudio﹣astudiothatwaslessefficient.1A.influenced B.promoted C.protected D.prevented2A.suffer B.escape C.work D.win3A.awful B.wonderful C.aware D.awkward4A.size B.height C.temperature D.weight5A.limited B.destroyed C.pressed D.struck6A.Unless B.Before C.Although D.When7A.remove B.reduce C.recycle D.replace8A.worthwhile B.rewarding C.tough D.annoying9A.examine B.test C.restore D.secure10A.nothing B.enough C.all D.something11A.for B.or C.but D.so12A.vain B.happy C.exciting D.disastrous13A.displayed B.arranged C.presented D.piled14A.predict B.inform C.conduct D.quit15A.approached B.cleared C.crossed D.comforted16A.former B.latter C.easier D.further17A.evaluated B.organized C.redesigned D.reserved18A.previously B.hopefully C.eventually D.desperately19A.concernedabout B.facedwith C.cautiousabout D.awareof20A.still B.ever C.even D.already
Atouringdigitalexhibitionofaformeremperors'residenceistokickoffinlateApriltheBeijing﹣sPalaceMuseumalso1knowastheForbiddenCityandShenzhen﹣basedculturalcompanyArtronannouncedonFriday.Theexhibitionwillusevirtual2real.andartificialintelligenceamongmanyothertechnologiesto3wellintroducethefruitsofacademicresearchonYangxinDiantothepublic4digitallypresentingtheabundantcollectionofculturalrelicsandofferinteractiveexperiencestovisitors.Thehallbuiltinthemid﹣16thcenturyduringtheMingDynastywasalso5residenceoflasteightemperorsoftheQingDynasty.Anditisoneofthemostimportant6buildintheForbiddenCity7wasChinasimperialpalacefrom1420to1911.YangxinDian8shuttothepublicsinceDecember2015foramajorrenovation维修.HoweveritsculturalrelicshavebeenexhibitedincitieslikeShenzhenandHongKong.Therenovationistolastuntil2020.Meanwhile9offeramorelmmersiveexperiencetovisitorsthePalaceMuseumdevelopedthedigitalexhibitionin2017presentedinthemuseum'sdigitalgallery.In2018itwasshownattheArtronArtCenterinShenzhenattractingabout10000visitorsovertwomonths.TheupcomingexhibitiontourwillstartfrominL+MallinShanghai10thelaterdestinationsofthetourhaven'tbeenannounced.
SignsofEatingDisorderAbout30millionAmericanslivewithaneatingdisorder.1Yetmanyothersareoftenhiddeninplainsight.It'simportanttoknowthesymptomsinthosewhomightbeatriskforaneatingdisorder.They'reconstantlytalkingaboutdieting.Thediscussionaroundchangingeatinghabitsisincrediblycommon.Lookatanylifestylemagazineorwebsiteandyou'lllikelyfinddietingtipsandadvice.2Ifsomeoneyouloveisconstantlytalkingaboutfoodortheirdietinghabitsitmightbeasignofconcern.3Changesinmoodorbehaviorssurroundingfoodorexercisecanbesignsofconcern.Thiscouldmeanaswitchinactivitylevellikeoverexercisingtoooftencountingcaloriesfrequentlyvisitingthebathroomaftereatingfastingoreatingtoomuch.4They'reconstantlyturningdownfood﹣centricsocialgatherings.Avoidingsocialinteractionssuchasbirthdaypartiesorgoingouttodinnerwithfriendsisasignificantdangersignal.Peoplelivingwiththeconditionhaveanintensefocusonfoodorbodyimage.Theywillkeepawayfromsituationslikelyonesthatoncebroughtthemjoy﹣wherethatdeterminationmightbetested.Thebestwaytosupportsomeonewhomaybeexperiencinganeatingdisorderisbytalkingwiththembutwhenandhowyoudoitmatters.5Approachthemwithloveandcompassionletthemknowthatyoucareaboutthemandthatyounoticethatthereissomethingtheymaybestrugglingwith.A.Thisalsomightcomewithanoticeableweightlossorgain.B.Howeverbeingtrappedinthatdiscussionisadifferentstory.C.Theirfitnessoreatinghabitsareconstantlyoutoftheordinary.D.Moodchangesassociatedwitheatingmayalsobeadangersignal.E.Itshouldbeawayfromthenormalroutineandoutsideofamealtime.F.Somesymptomsofaneatingdisordermaybemorevisibletotheeyes.G.Eatingdisordersareagroupofconditionsmarkedbyanunhealthyrelationshipwithfood.
今年是门捷列夫发现元素周期律150周年．下表是元素周期表的一部分WXYZ为短周期主族元素W与X的最高化合价之和为8．下列说法错误的是
环戊二烯是重要的有机化工原料广泛用于农药橡胶塑料等生产．回答下列问题 1已知g═g+H2g△H1＝100.3kJ•mol﹣1① H2g+I2g═2HIg△H2＝﹣11.0kJ•mol﹣1② 对于反应g+I2g═g+2HIg③△H3＝kJ•mol﹣1． 2某温度下等物质的量的碘和环戊烯在刚性容器内发生反应③起始总压为105Pa平衡时总压增加了20%环戊烯的转化率为该反应的平衡常数Kp＝Pa．达到平衡后欲增加环戊烯的平衡转化率可采取的措施有填标号． A．通入惰性气体B．提高温度C．增加环戊烯浓度D．增加碘浓度 3环戊二烯容易发生聚合生成二聚体该反应为可逆反应．不同温度下溶液中环戊二烯浓度与反应时间的关系如图所示下列说法正确的是填标号． A．T1＞T2 B．a点的反应速率小于c点的反应速率 C．a点的正反应速率大于b点的逆反应速率 D．b点时二聚体的浓度为0.45mol•L﹣1 4环戊二烯可用于制备二茂铁FeC5H52结构简式为后者广泛应用于航天化工等领域中．二茂铁的电化学制备原理如图所示其中电解液为溶解有溴化钠电解质和环戊二烯的DMF溶液DMF为惰性有机溶剂． 该电解池的阳极为总反应为．电解制备需要在无水条件下进行原因为．
Bootcamp﹣stylefitnessclassesaretakingNewYorkCitybystormandevensoldierssaysomeoftheseexercisesareharderthanthebasictrainingtheyexperienced.Theseclassescondense压缩90daysoftrainingintoanhour﹣longclass.'It'smuchmorechallengeableinthatyoudon'thaveabreak'saysChadVincent37.Soifyouwantaworkoutthatwillhelpyoubeallyoucanbeherearesomegoodchoices:CircuitofChange57W.16thSt.212255﹣0053Thebase:Thisclass﹣foundedbyBrianDelmonicoin2011﹣helpsNewYorkersfindpeaceofmind.Marchingorders:Theone﹣hourfocusdoesn'tmeanyouwon'tsweat.Expectamixofgymnasticsandyogaindoorswhileoutdoorclassesincluderunningandjumpingoverbenchesandasmallwall.WarriorFitnessBootCamp29W.35thSt.212967﹣7977Thebase:Monkeybarsandhangingropesdecoratethisspacewhereacrewoffivenot﹣afraid﹣to﹣shoutinstructorsdohelp.Marchingorders:ThisworkoutmodeledafterrealbootcampsisasauthenticasitgetsaccordingtoformerMarineSgt.海军中士RubenBelliard.'Westaytruetothefactthatthisiswhatwewentthrough'hesays.Classesincludeaseriesof90﹣seconddrillsthatrequireteamworktocomplete.Stacy'sBootCamp646537﹣5466;stacysbootcamp.comThebase:StacyBermanturns17yearsofkickboxingexperienceintoaseriesofoutdoorbootcampsinCentralParkandBatteryPark.Marchingorders:ThreeweeklyclassesstartintheearlymorningaccordingtoLieslMarelli.Uncertaintyisabigpartoftherecipe.'Youdon'tknowwhatshe'sgoingtothrowatyouthatday'saysMarelli.BrickNewYork257W.17thSt.;bricknewyork.comThebase:ThispopularLosAngelesCrossFitgymopenedthismonthandinstructorWillLanierisalreadybeginningtotrainNewYorkerswithbootcamp﹣stylerunsandoutdoorworkouts.Marchingorders:ThelO﹣minutewarm﹣uprunwillfeeleasybeforeLanierstartshis'60﹣minuteworkout.'AlsodifferentformbootcampBrickwillsoonofferyogaclasses.1WhatisspecialaboutStacy'sBootCamp?A.Ithelpstofindinnerpeace.B.Thewarm﹣upactivityiseasy.C.Ithasaveryflexibleschedule.D.Theinstructorsareextremelystrict.2Whichofthefollowingclassesneedsmoreteamspirit?A.WarriorFitnessBootCamp.B.Stacy'sBootCamp.C.CircuitofChange.D.BrickNewYork.3Whatisthepurposeofthetext?A.Toencouragereaderstodomoreindoorexercises.B.Torecommendseveralbootcamp﹣stylefitnessclasses.C.Topersuadereaderstojoinbootcamp﹣stylefitnessclassesD.Tointroducetheadvantagesofbootcamp﹣stylefitnessclasses.
Hotshotjetpilotsarenomatchforcliffswallows.ThebirdsrocketoverbridgesandskimoverlakesrushingforwardataccelerationsthatwouldknockanAirForce.Bytrackingthesecontestswithhigh﹣speedcamerasanewstudygivesthefirstin﹣depthpeekintoavianaerodynamics鸟类空气力学inthewild.'Thefindingsmayevenprovideinsightintohowtodesignbettermicroairvehicles﹣tinydrones.Thistechnologywillbebrilliantlyuseful'saysbiomechanicsexpertJimUsherwoodoftheUnitedKingdom'sRoyalVeterinaryCollegeinHatfield..'High﹣resolutionfieldstudieslikethishaveneverbeendonebeforeforbirds.'ForcliffswallowsthetroublestartswhentheyreturnfromwinteringinSouthAmericatotheirsummerhomesinNorthAmerica.Afterarrivaltheyseekouttheiroldmudnests﹣usuallylocatedunderconcretebridgesandfreeways﹣andstartrebuildingtheirhomes.Butratherthanhuntdownafreshsupplyofmudsomeswallowspreferstealingsuppliesfromtheirmorehardworkingneighbors.Otherstakethingsfurtherandwillevenlayaneggortwointheirneighbor'snestbeforetakingoff.Battlesintheairfollowiftheinvadersarecaughtintheactandanewstudytakesadvantageofthesefightstolearnhowbirdsperformhigh﹣speedmaneuvers演习.TheteamplacedthreecamerasalongaNorthCarolinalakecrossedbyahighwaybridgethathousesseveralcliffswallownestsandwaitedforthebattlestocommence.Theteamwassurprisedtolearnthatmostofthetime*chaserscopiedthemoveoffleeinginvaders.Swallowsalsopullveryhardturnstoescapeanenemy*withoneextremecasereaching＝7.8gravity.Fighterpilotsusuallypassoutatabout5or6gravitywhichiswhytheseexperimentshaveearnedinterestandpartialfundingfromtheOfficeofNavalResearch.TheNavymayusethefindingstobuildbetterguidancesystemsformicroairvehicles.Howevertheswallowsbiomechanicsarecomplexandnowtheteamissimplytryingtocollectafewtricks.1WhydidtheUsherwoodcarryoutthestudies?A.Toguideabetterdesignofairvehicles.B.Toprovetheswallowsarebetteratflying.C.Toexperimentwithitshigh﹣speedcameras.D.Totrackhowtheswallowsskimoverlakes.2Whatleadstothebattlesamongthebirds?A.Sharingfood.B.Occupyingothers'nests.C.Seizingmudfornesting.D.Competingfortheuseofbridges.3Whichcanbestreplacetheunderlinedword'commence'inparagraph3?A.continueB.accelerateC.endD.begin4Whatisthetrickoftheswallowtoescapeitsenemy?A.Acceleratingtowardit.B.Copyingwhatitsenemydo.C.MakingsharpturnsduringflightD.Seekingforhelpfromitsfellows.
Thewaypeopleholdtothebeliefthatafun﹣filledpain﹣freelifeequalshappinessactuallyreducestheirchancesofeverattainingrealhappiness.Iffunandpleasureareequaltohappinessthenpainmustbeequaltounhappiness.Butinfacttheoppositeistrue:moreoftenthannotthingsthatleadtohappinessinvolvesomepain.Asaresultmanypeopleavoidtheveryattemptsthatarethesourceoftruehappiness.Theyfearthepaininevitablybroughtbysuchthingsasmarriageraisingchildrenprofessionalachievementreligiouscommitmentselfimprovement.Askabachelorwhyheresistsmarriageeventhoughhefindsdatingtobelessandlesssatisfying.Ifheishonesthewilltellyouthatheisafraidofmakingacommitment.Forcommitmentisinfactquitepainful.Thesinglelifeisfilledwithfunadventureexcitement.Marriagehassuchmomentsbuttheyarenotitsmostdistinguishingfeatures.Coupleswithinfantchildrenareluckytogetawholenight'ssleeporthree﹣dayvacation.Idon'tknowanyparentwhowouldchoosethewordfuntodescriberaisingchildren.Butcoupleswhodecidenottohavechildrenneverknowthejoysofwatchingachildgrowuporofplayingwithagrandchild.Understandingandacceptingthattruehappinesshasnothingtodowithfunisoneofthemostliberatingrealizations.Itliberatestime:nowwecandevotemorehourstoactivitiesthatcangenuinelyincreaseourhappiness.Itliberatesmoney:buyingthatnewcarorthosefancyclothesthatwilldonothingtoincreaseourhappinessnowseemspointless.Anditliberatesusfromenvy:wenowunderstandthatallthosewhoarealwayshavingsomuchfunactuallymaynotbehappyatall.1Accordingtotheauthorabachelorresistsmarriagechieflybecause.A.heisreluctanttotakeonfamilyresponsibilitiesB.hebelievesthatlifewillbemorecheerfulifheremainssingleC.hefindsmorefunindatingthaninmarriageD.hefearsitwillputanendtoallhisfunadventureandexcitement2Raisingchildrenintheauthor'sopinionis.A.amoraldutyB.arewardingtaskC.athanklessjobD.asourceofinevitablepain3Fromthelastparagraphwelearnthatenvysometimesstemsfrom.A.HatredB.misunderstandingC.PrejudiceD.ignorance4Whatistheauthortryingtotellus?A.Happinessoftengoeshandinhandwithpain.B.Onemustknowhowtoattainhappiness.C.Itisimportanttomakecommitments.D.Itispainthatleadstohappiness.
分子式为C4H8BrCl的有机物共有不含立体异构
假定英语课上老师要求同桌之间交换修改作文请你修改你同桌写的以下作文.文中共有10处语言错误每句中最多有两处.每处错误仅涉及一个单词的增加删除或修改. 增加:在缺词处加一个漏字符号∧并在其下面写出该加的词. 删除:把多余的词用斜线\划掉. 修改:在错的词下划一横线并在该词下面写出修改后的词. 注意:1.每处错误及其修改均仅限一词; 2.只允许修改10处多者从第11处起不计分. MycousinLiMingtoldmehewouldbetakinghisdriver'stestagain.Heseemedconfidencealthoughhehavefailedhisfirstroadtest.Ifeltsympathyforhimthinkhemighthaveasamefearhedidlasttime.IencouragedhimthoughIwasnotsooptimisticabouttheirchances.Lateronhecalledsharethegoodnewsthathehadpassedit.Beforetheroadtestourfamilygatheredexcitedathishouse.Icongratulatedhimwithahug.Iaskedhimtodrivewithmeanywhereheliked.ThreeofourcousinpiledinwithusandwetookourfirstridewithLiMing.
Officefurniturelikechairsandsofasshouldbeattractiveaswellascomfortable. A.manually B.visually C.physically D.securely
﹣IsitenoughtofinishtheformforapassportMadam? ﹣Yourpassportapplicationformshouldbebytworecentphotos. A.updated B.accompanied C.established D.identified
Arecentstudyfoundthatpeoplewholiveincolderclimatesconsume1muchalcoholthanpeoplewholiveinwarmweather.'Alcoholissomethingthateveryonethoughtharmfulfor2decadebutnoonehasscientificallydemonstratedit'aprofessorwroteinapressrelease.WhydopeopleinRussiadrinksomuch?Everybody3assumethat'sbecausetheweatheriscold.Butwecouldn'tfindasinglepaper4linkclimatetoalcoholintake.Sincealcoholcouldincreasewarmbloodflowintheskinlastmonththeresearchersinastudy5suggestthatpeopleshouldreachforbooze豪饮whenit'scoldoutside.Theresearcherscombedthroughdatatocompareclimatefactorsandalcoholconsumptionpercapita每人的.6studyalsofoundthatastemperaturesandsunlighthoursdecreasealcoholconsumptiongoesup.Shorterhoursofsunlightandcoolertemperaturesalsorelate7higherratesofdepression8islinkedtoanincreaseindrinking.Theprofessorhopesthisdatawillhelpinfluencehealthpoliciesonalcoholabuse.'Knowingthatcolderplaceshavemoredrink﹣relatedproblemscouldbe9helptotheeffortsintheseareas10determinebetterpolicies'hesaid.
热门题库
更多
教案备课库
教案备课库
教案备课库
教案备课库
教案备课库
教案备课库
教案备课库
教案备课库
高一下学期数学
教案备课库
高一上学期数学
高一上学期化学
教案备课库
教案备课库
教案备课库
高一上学期物理
湘公网安备 43130202000226号