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如图,在Rt△ABC中,∠ACB=90°,AC=6,BC=8,AD平分∠BAC,AD交BC于点D,ED⊥AD交AB于点E,△ADE的外接圆⊙O交AC于点F,连接EF. (1)求证:BC是⊙O的切线...
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在Rt△ABC中∠ACB=90°AC=6BC=4.将△ABC绕直角顶点C.顺时针旋转90°得到△DE
在Rt△ABC中∠ACB=90°AC=24cmAB=26cm则其直角边BC的长为
6cm
100cm
15cm
10cm
如图Rt△ABC中∠ACB=90°AC=4BC=6以斜边AB上的一点O.为圆心所作的半圆分别与AC.
2.5
1.6
1.5
1
如图在Rt△ABC中∠ACB=90°AC=6BC=4将△ABC绕直角顶点C.顺时针旋转90°得到△D
已知Rt△ABC中∠ACB=90ºAB=5两直角边ACBC的长是关于x的方程x2m+5x+6m=0的
如图Rt△ABC中∠ACB=90°AC=BC=2若把Rt△ABC绕边AB所在直线旋转一周则所得几何体
如图已知Rt△ABC中∠ACB=90°AC=6BC=4将△ABC绕直角顶点C.顺时针旋转90°得到△
如图在Rt△ABC中∠ACB=90°AC=BC=1将Rt△ABC绕A.点逆时针旋转30°后得到Rt△
如图在Rt△ABC中∠ACB=90°AC=BC=1将Rt△ABC绕A.点逆时针旋转30°后得到Rt△
如图在Rt△ABC中∠ACB=90°AC=8BC=6CD⊥AB垂足为D则tan∠BCD的值是.
如图Rt△ABC中∠ACB=90°AC=4BC=6以斜边AB上的一点O.为圆心所作的半圆分别与AC.
2.5
1.6
1.5
1
已知Rt△ABC中∠ACB=90ºAB=5两直角边ACBC的长是关于x的方程x2—m+5x+6m=0
如图4240在Rt△ABC中∠ACB=90°AC=3BC=4以点A.为圆心AC长为半径画弧交AB
如图Rt△ABC中∠ACB=90°AC=BC=2若把Rt△ABC绕边AB所在直线旋转一周则所得几何体
已知如图在Rt△ABC中∠ACB=90°CD⊥AB于点D.若AC=4BC=3则CD=________
如图在Rt△ABC中∠ACB=90°AC=BC=2将Rt△ABC绕点A.逆时针旋转30°后得到Rt△
如图在Rt△ABC中∠ACB=90°AC=3BC=4以AC为直径的圆交AB于点D.求BDCD的长.
如图1168在Rt△ABC中∠ACB=90°CD⊥ABAC=6AD=3.6则BC=_______
如图已知Rt△ABC中∠ACB=90°AC=6BC=4将△ABC绕直角顶点C.顺时针旋转90°得到△
如图在Rt△ABC中∠ACB=90°AC=6BC=8AD是∠BAC的平分线.若P.Q.分别是AD和A
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Canetoadsalsoknownasbufotoadsareyetanotherinvasive入侵speciesthathasfoundahospitablehomeinwarmsouthernFlorida.DeliberatelyintroducedfromSouthandCentralAmericainthe1930stheyweresupposedtocontrolbeetlesdamagingthesugarcanecrop﹣that'showtheygotthename'canetoads.'Canetoadscanposeaparticulardangerbecausetheadultonesshoottoxin毒素fromtheirbackwhenattacked.Thetinytoadsdon'tcarryenoughtoxintobedeadlyyetbutbigadultonescaneasilysendadogintoaseizure疾病发作orevenkillit.Thetoxinis'veryviscousandwouldstickinsidethedog'smouth'saysSteveJohnsonawildlifeecologistattheUniversityofFlorida.Ownersshouldtrytowipeoutanaffecteddog'smouthandimmediatelytakeittothevet.TilfordstartedToadBustersin2017.Thewomanwholivedtherehadninecatswhichshefedbydumpingalmostabagofcatfoodeverynight.Canetoadsnormallyeatbugsbuttheyarehappytoeatpetfoodtoo.CanetoadshaveadaptedbeautifullytotheFloridasuburbssoalotofTilford'sworkalsoinvolvesgettingpeopletorethinktheirsuburbanbackyard.Nomorecatfoodforexample.Petpoop粪便canalsoattractinsectswhichcaninturnattracttoads.Asdolights.Andtoadslovetobreed繁殖inattractivepoolsofwatersuchasthelakeintheaffectedPalmBeachGardenneighborhood.For'theselargercommunitiesthatwanttobuildthesebeautifulpondsandwanttohavehousesonponds'Tilfordsaid'thisisalmostapest﹣controlservice.'Thecanetoadsaren'tgoingawaybuttheycanbemanagedlikemosquitoesorrats.DealingwithtoadsamountstoanannoyingthinginFloridabuttheycanalsocreatemoredramaticproblems.InAustralia﹣wheretheywerealsodeliberatelyintroducedinthe1930stoprotectsugarcane﹣theyareagenuinescourge灾祸.TheissueisthatAustraliahasnonativetoadspeciessononeofthepredators食肉动物knewhowtoavoidthetoxictoads.Asthecanetoadsadvancedeasttowestacrossthecontinent'theyleftawakeofdeadanimalsintheirpaths'saysSeanDoodyanecologistattheUniversityofSouthFloridaatSt.PetersburgwhohasstudiedcanetoadsinAustralia.Turtleslizardsandcrocodilesjuststarteddyingoutwhichwasgoodnewsfortheirprey受害者.'Ifyouwereasmallspeciesthatwaspreviouslybeingeatensuddenlyyou'reonahoneymoon'saysRickShineabiologistatMacquarieUniversityinSydneyAustraliawhohasalsostudiedtheimpactofcanetoadsonAustralianwildlife.1Whatcancanetoadsbedescribedas?A.InvasivespeciesintroducedtoSouthAmerica.B.Naturalenemiesofbeetlesdamagingsugarcane.C.Dangerousspeciesmakingactiveattacksondogs.D.Agreatthreatpresentedtosomewildlifeecologists.2WhichmightbetheproperwayofavoidingcanetoadsaccordingtoTilford?A.Abandonthesuburbanbackyard.B.Lightupthebackyardatnight.C.Controlthenumberoflargehouses.D.Keeppetfoodawayfrombackyard.3WhathappenedinAustraliaaftercanetoadsbeingintroduced?A.Canetoadsdestroyedsomefoodchains.B.Mostofthepredatorsdiedoftoadtoxin.C.Canetoadsbredatamuchslowerpace.D.Bigspecieslearnedtoavoidcanetoads.
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
﹣的相反数是
Havingbattledwiththeiroverwhethertoofferhelptoanagedmanorwomanwhohasfallenovermostpeoplechoosetohelp. A.compromise B.contradiction C.conscience D.competence
Wecompletedonethirdoftheprojectandtheloaninplacewehadtodelaytheresttillthenextmonth. A.notarranged B.wasnotarranged C.notarranging D.hadnotbeenarranged
如图在等腰直角三角形ABC中∠BAC=90°一个三角尺的直角顶点与BC边的中点O重合且两条直角边分别经过点A和点B将三角尺绕点O按顺时针方向旋转任意一个锐角当三角尺的两直角边与ABAC分别交于点EF时下列结论中错误的是
WeofferedtopayourhalfofthecostthatwasneededtorestoretheshareddoorwaybutCharleswouldhaveofit. A.nothing B.anything C.none D.any
Youngcoupleswillbehappytoseetheirbabieswithgoodhealthandintelligencewhentheyareborn. A.tobless B.blessing C.blessed D.beingblessed
若不等式组无解则m的取值范围为
下列计算正确的是
TheurgetoshareourlivesonsocialmediaPeoplehavelongusedmediatoseereflectionsofthemselves.Longbeforemobilephonesorevenphotographydiarieswerekeptasawaytounderstandoneselfandtheworldinwhichonelives.Inthe18thand19thcenturiesasdiariesbecamemorepopularmiddle﹣classNewEnglandersparticularlywhitewomenwroteabouttheireverydaylivesandtheworldaroundthem.Thesediarieswerenotaplaceintowhichtheypouredtheirinnermostthoughtsanddesiresbutratheraplacetochronicle记录thesocialworldaroundthem.Thediariescapturedtheeverydayroutinesofmid﹣19th﹣centurylifeandwomendiaristsinparticularfocusednotonthemselvesbutontheirfamiliesandtheircommunities.Diariestodayareforthemostpartprivate.ButthingsweredifferentfortheseNewEnglanddiaries.Youngwomenwhoweremarriedwouldsendtheirdiarieshometotheirparentsasawayofmaintainingkin血缘relations.Whenfamilyorfriendscametovisititwasnotuncommontositdownandgothroughone'sjournaltogether.Diariesarenottheonlymediathatpeoplehaveusedtodocumentlivesandsharethemwithothers.Wehavelongusedmedialikephotoalbumsbabybooksandevenslideshowsasameansofcreatingtraces痕迹ofourlives.Wedothistounderstandourselvesandtoseetrendsinourbehaviour.Wecreatetracesaspartofouridentityandpartofourmemory.Sharingeverydaylifeeventscanstrengthensocialconnectionandintimacy亲密感.Forexampleyoutakeapictureofyourchild'sfirstbirthday.Itisnotonlyadevelopmentalmilestone:thephotoalsostrengthentheidentityofthefamilyunititself.Theactoftakingthephotoandproudlysharingitfurtherreaffirms再次证实oneasagoodandattentiveparent.Inotherwordsthemediatracesofothersfigureinourownidentities.Today'ssocialmediaplatformsarebyandlargefreetouseunlikehistoricaldiarieswhichpeoplehadtobuy.Todayadvertisingsubsidises补贴ouruseofnetworkedplatforms.Thereforetheseplatformsencourageuseoftheirnetworkstobuildlargeraudiencesandtobettertargetthem.Ourpicturesourpostsandourlikesarecommodified﹣thatistheyareusedtocreatevaluethroughincreasinglytargetedadvertising.Insteadofsocialmediamerelyconnectingusithasbecomeacraze狂热forinformationcontinuallytryingtodrawusinwiththepromiseofsocialconnectivity﹣it'ssomeone'sbirthdaysomeonelikedyourpictureetc.There'samultibillion﹣dollarindustrypullingusintooursmartphonesrelyingonalongstandinghumanneedforcommunication.Theurgetobepresentonsocialmediaismuchmorecomplexthansimplynarcissism自恋.Socialmediaofallkindsnotonlyenablepeopletoseetheirreflectionsbuttofeeltheirconnectionaswell.
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.
在菱形ABCD中点P是BC边上一点连接AP点EF是AP上的两点连接DEBF使得∠AED=∠ABC∠ABF=∠BPF. 求证1△ABF≌△DAE 2DE=BF+EF.
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
学习一定要讲究方法比如有效的预习可大幅提高听课效率.九年级1班学习兴趣小组为了了解全校九年级学生的预习情况对该校九年级学生每天的课前预习时间单位min进行了抽样调查并将抽查得到的数据分成5组下面是未完成的频数频率分布表和频数分布扇形图 请根据图表中的信息回答下列问题 1本次调查的样本容量为表中的a=b=c= 2试计算第4组人数所对应的扇形圆心角的度数 3该校九年级共有1000名学生请估计这些学生中每天课前预习时间不少于20min的学生人数.
若关于x的一元二次方程k﹣2x2﹣2kx+k=6有实数根则k的取值范围为
计算﹣﹣÷=.
在阳光中学举行的春季运动会上小亮和大刚报名参加100米比赛预赛分ABCD四组进行运动员通过抽签来确定要参加的预赛小组小亮和大刚恰好抽到同一个组的概率是.
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.
AmongallthetouristattractionsinSydneythemagnificentOperaHouseistheshiningstar.OntheedgeofBennelongPointatongueoflandstickingoutintoSydneyHarborthisUNESCOWorldHeritageSiteconsistsofacomplexofroofsshapedlikehugeshellsorbillowingsailsthatmixbeautifullywithitswaterfrontlocation.Todayvisitorscanadmirethegreatbeautyofthebuilding.Muchmorethananoperahousethestructureencompasses包含theatersstudiosaconcerthallrehearsalandreceptionroomsrestaurantsandaspectacularopen﹣airforecourtoverlookingtheharborandcity.AmericanarchitectLouisKahnoncesaid'Thesundidnotknowhowbeautifulitslightwasuntilitwasreflectedoffthisbuilding.'TipsandTacticsBookseatsforproductionswellinadvance.Performancescommencepromptlysovisitorsshouldallowenoughtimetoaccessthebuildingcollectticketsandstowcloakslargebagsandjackets.Considerenjoyingamealinoneoftherestaurantstoenjoythestunningharborviews.OneofthebestsitestophotographtheOperaHouseisMrs.Macquarie'sChairintheRoyalBotanicGardensorfromthewateraboardaharborcruise.GettingtotheSydneyOperaHouseVisitorscancatchaSydneyBustravelbyCityRailorhopaboardaSydneyFerrytoCircularQuaywhichisa5to7minutewalkfromtheSydneyOperaHouse.Afreeshuttlebusforelderlyandmobility﹣challengedpatrons顾客runsbetweenCircularQuaynearStandEundertheCahillExpresswayandtheVehicleConcourse.BikeparkingisavailableundertheSydneyOperaHouseMonumentalSteps.Wilson'sSydneyOperaHouseCarParkislocatedat2MacquarieStwithvehicleaccessnexttotheSydneyOperaHouseForecourt.Admission:Ticketpricesvaryfromattractiontoattraction.Location:BennelongPointSydney.1WhichofthecharacteristicsofSydneyOperaHousemightattractvisitorsmost?A.Itshistoricalcontext.B.Itsuniquearchitecture.C.Itswaterfrontlocation.D.Itssuperbharborviews.2IfyouareavisitortoSydneyOperaHouseyoucan.A.takeaferrydirectlytoSydneyOperaHouseB.rideafreeshuttlebuswithoutanyrestrictionsC.takeanequallygoodphotofromanyangleD.driveacarto2MacquarieStandparkthere
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.
数轴上OA两点的距离为4一动点P从点A出发按以下规律跳动第1次跳动到AO的中点A1处第2次从A1点跳动到A1O的中点A2处第3次从A2点跳动到A2O的中点A3处按照这样的规律继续跳动到点A4A5A6…An.n≥3n是整数处那么线段AnA的长度为n≥3n是整数.
如图点A4B3m是直线AB与反比例函数y=x>0图象的两个交点AC⊥x轴垂足为点C已知D01连接ADBDBC. 1求直线AB的表达式 2△ABC和△ABD的面积分别为S1S2.求S2﹣S1.
Thoughourfootballboysarefacedwithfourgoalsbehindtheyarestillstrugglinghardinthefieldto. A.facethemusic B.saveface C.costtheirarmandleg D.landontheirfeet
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.
如果分式的值为0那么x的值为
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