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如图,△ABC中,E为BC边的中点,CD⊥AB,AB=2,AC=1,DE=,则∠CDE+∠ACD=( )
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如图在Rt△ABC中AC=BC∠ACB=90°点D.为边AB上一点CD绕点D.顺时针旋转90°至DE
如图l在四边形A.8CD中AB=CDE.F.分别是BCAD的中点连结EF并延长分别与BACD的延长线
如图在Rt△ABC中∠ACB=90°D.为AB的中点AE∥CDCE∥AB连接DE交AC于点O..1证
如图在△ABC中D.E.分别是ABAC边的中点且DE=6cm则BC=____________.
如图Rt△ABC中∠ACB=90°D是斜边AB上的中点E是边BC上的点AE与CD交于点F且AC2=C
如图1Rt△ABC中∠ACB=90°AB=5BC=3点D在边AB的延长线上BD=3过点D作DE⊥AB
如图在△ABC中点D.E.F.分别是边AB.AC.BC的中点要判定四边形DBFE是菱形下列所添加条件
AB=AC
AB=BC
BE平分∠ABC
EF=CF
如图在△ABC中点D.在边AC上DB=BCE.是CD的中点F.是AB的中点1求证EF=AB.2当∠C
如图在Rt△ABC中∠ACB=90过点C.的直线MN∥ABD.为AB边上一点过点D.作DE⊥BC交直
如图在△ABC中AB=BCD.E.F.分别是BCACAB的中点.1求证四边形BDEF是菱形2若AB=
已知如图在梯形ABCD中AB∥CDBC=CDAD⊥BDE.为AB的中点求证四边形BCDE是菱形
如图在四棱锥P.-ABCD中PD⊥面ABCDAD∥BCCD=13AB=12BC=10AD=12BC.
如图在△ABC中AB=AC点D为BC边的中点∠BAD=20°则∠C=_________.
如图在△ABC中点D.E.F.分别是ABBCCA的中点AH是边BC上的高.1求证四边形ADEF是平行
探究如图①在△ABC中DE是边BC的垂直平分线交BC于点D.交AB于点E.连结CE求证CE+AE=A
如图1在四边形ABCD中AB=CDE.F.分别是BCAD的中点连接EF并延长分别与BACD的延长线交
已知如图在△ABC中BC=AC=6以BC为直径的⊙O.与边AB相交于点D.DE⊥AC垂足为点E.1求
如图在△ABC中AB=AC点D.E.F.分别在边BCABAC上并且BD=CFBE=CDG.是EF中点
如图所示在梯形ABCD中AD∥BCAB=CDE.F.G.H.分别为边ABBCCDDA的中点求证四边形
如图在四边形ABCD中∠ABC=150°∠BCD=30°点M.在BC上AB=BMCM=CD点N.为A
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假定你是李华你校将迎接英国学生代表团.作为学校书法社团部长请你写一篇发言稿要点如下 1.介绍书法用品 2.阐述书法学习的好处 3.邀请英国学生参加书法练习活动 注意 1.词数100左右 2.可以适当增加细节以使行文连贯 3.开头已为你写好. 参考词汇书法calligraphy 文房四宝theFourTreasuresoftheStudywritingbrushinkstickpaperinkslab Dearfriends We'dliketoshareourculturewithyoubyintroducingyoutotheartofChinesecalligraphy.
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Forhealthyadultsexpertssaythateatingalotoffruitisunlikelytogetyouintotroubleaslongasit'spartof1normaldiet. Themainconcernwithovereatingfruitis2itnaturalsugaryetresearchhasalwayslinkedwhole﹣fruiteatingtoa3reduceriskforobesityandotherdiseases.That'sbecausewholefruithasafewbuilt﹣in4advaniagethatseemtoreduceanysugar﹣drivenhealthrisks.Itcontainstwokindsoffiberwhichformabarrierontheinsideofthesmallintestine肠.Thisbarrierlimitstherateofsugarabsorbingsothattheliver肝isnotharmedjustlikestoppingalargewave5buildinganunderwaterwall.Fruitfiberalso6helpfoodreachthefinalpartofyoursmallintestinesoonersoyoutendtofeelfull7quickaftereatingfruit.Asaresultthechancesyouwillovereatfruitarerelativelylow. Somefruitsmaybebetter8eatthanothers.Forexampleberrieshavebeenlinkedtobothbetterheartandbetterbrainhealth.9grapesmayneedmoreself﹣control.They'remainlylittlebagsofsugar. Ifyoulovewholefruitthere'slittleevidencetoshow10eatingit一evenawholelotofit﹣isbadforyourhealth.
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ThePalaceMuseumiscelebratingitsupcoming600thanniversary.Itsnewattempt1fillyoungergenerationswithcultureisafabulousmixofcelebritiesancienthistoryandmoderntechnology.ThePalaceMuseumishometo2rough1.86millionprecioushistoricalrelics遗迹andamong3theNorthSongDynastymasterpieceAlongtheRiverduringtheQingmingFestivalpaintedbyZhangZeduan4considertobeofgreatvalue.ThepaintinghassuchareputationofbeingChina'sMonaLisa5millionsofvisitorsareattractedtoenjoyit.The6originmasterpieceisstatic静态的anditseemsthatthegeneralpublicrarelyknows7thepaintingisattemptingtoconvey.Since2000thePalaceMuseum8cooperatewithtechnologycompaniestomakethesesilenthistoricalrelicscomealive.Thedigitalizedversionoftheworkcanbeshownonthegiantscreeninanexhibitionroom.Visitors9wearVRglasseswilltakeaboatandexploretheneighborhoodoftheBianRiver.Thankstomoderntechnologyalltheprecioushistoricalrelicswillbebrought10lifewiththeirobscure晦涩的wordseasiertounderstand.
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假定你是校学生会__李华上周你校组织一个文化交流团到英国某高中进行文化交流现已回国.请你代表你校交流团给英国活动负责人David写一封信内容包括1.感谢对方的招待2.此行的体验和收获3.邀请对方暑假来中国体验中国文化.注意1.字数100左右开头结尾已为你写好不计入总词数2.可以适当增加细节以使行文连贯.DearDavidWehavebeenbackhomesafelyfromEngland.YoursLiHua
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.错误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.每处错误及其修改仅限一词. 2.只允许修改10处多者从第11处起不计分. MylittlebrotherandIwentshoppinginnewlyopenedsupermarketinourcitylastMonday.Wetastedalittledeliciouscheesebiscuitsandbuythreeboxesofcandies.SeenoneofmyfavouritechocolatecakesIquickenedmystepsthroughthecrowd.AfewminuteslateIcouldn'tfindmybrotherandgotanxious.Sincethereweresomanypeopleinthesupermarketsoitwasquitetoughformetofindher.Ihadtoaskasalesmanforsomeadvices.Itwasn'tlongafterthesalesmanfoundaloudspeakerandstartedtosearchformybrother.ThanksforthesalesmanImanagedtofindmybrotheratlast.
ItwasdaysorevenweekssinceIhadbeenleftontheisland.MyonlycompanionwasadogcalledPhillywhichhadsurvivedtheshipwreck.Memoriesofwhathappenedwerestillfresh. Themagnificenceoftheshiphadgivenusallafalsesenseofsecurity.Asthefirstsignsofthestormstartedourcaptainannouncedit'snothingmuchjustanotherstorm.Yethewaswrong!Thestormhittheshipsobadlythatlargeholesweremadeatthesidesoftheship.Asthefreezingwaterstartedrushinginourshipwasconsumedquicklybythedarkwater. MytrainofthoughtwasdisturbedbyPhillylickingmyhanddearly.Areyouhungry?Ispokemyfirstwordseversincetheshipwreckoccurred.Woofwoof!BarkedPhillyenthusiastically.Atthismomentmystomachgavealoudgrowltoo.Icouldnotrememberwhenmylastmealwasprobablyaten﹣coursedinnerontheship.AsIhadneverfishedbeforeIthoughtmaybeIcouldtrysomethingsimplerlikepickingfruits.WithPhillyatmysidearmedwithasharpbranchwewalkedintotheforestontheislandtogether.SuddenlyIthoughtIheardnoises.Couldtherebeanyoneelseonthisisland?Iwondered.Aswewerelookingforfruittreeswechancedupononethatboreyellowjuicy﹣lookingfruit.Phillystartedbarking﹣wehadcompany.Itwasadark﹣skinnedwomanholdingasharpspeardressedinfurandgrass.Ibackedawayfromherafraidthatshewouldbeaggressive.ThenIsawthatshewastryingtosaveus.Pointingherspearatthefruittreesheshookherheadstrongly. InoddedathertoshowIunderstoodwhatshewassaying.SignalingtoustofollowhersheturnedtowalkalongasmallpaththatIhadnevernoticed.Attheendofthesmallpaththerewasasmallvillage.Tearsofjoyfilledmyeyes. 1Whathappenedtotheshipthewriterhadbeenon? A.Itwasfrozeninthesea. B.Itwasturnedoverbythestorm. C.Itwasdesertedbecauseitwasinsecure. D.Itsankduetothedamagecausedbythestorm. 2AccordingtothepassagewhichofthefollowingcanbestdescribePhilly? A.Activeandfriendly. B.Caringbutaggressive. C.Smartandfaithful. D.Noisybutenthusiastic. 3Whydidthewriterwalkintotheforest? A.Totakeshelterfromthestorm. B.Togotoasmallvillage. C.Tofindsomeoneforhelp. D.Tolookforsomethingtoeat. 4Thewomanmostprobablytriedtotellthewriterthat. A.thefruittreewasn'tthebestchoice B.thefruitwasunfitforeating C.thewriterwasn'tallowedtopickthefruit D.shewasn'tafraidofthewriter
解方程=﹣3.
如图在物理课上小明用弹簧秤将铁块A悬于盛有水的水槽中然后匀速向上提起直至铁块完全露出水面一定高度则下图能反映弹簧秤的读数y单位N与铁块被提起的高度x单位cm之间的函数关系的大致图象是
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同的增加删除或修改. 增加在缺词处加一个漏字符号Ʌ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. ThenewschoolyearisaroundcornersoIneedtobuysomethingtomychildrenandmyself.Thereforeyesterday'safternoonItookthemtoashoestoretobuyingsomenewshoes.Myyoungestkidswantedapairofsportsshoesandthusweboughtonepair.Myoldersonneededapairofcasualshoesforschool.andwewerefoundsomeonsale.Thefirstpairwhichhetriedonwasalittlesmall.soheputonotherpair.andtheyfittedhimperfectly.Mydaughterwantedbeautydressshoesandshegotsomehighheels.Imyselfboughtsomebootsbecausemyoldoneswerewearingout.
如图△ABC是⊙O的内接正三角形图中阴影部分的面积是12π则⊙O的半径为.
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DutchdesignerDaanRoosegaardehasspentmuchofhistimeseekingartisticsolutions解决方案tosolveourenvironmentalproblems.HispastprojectsincludeBioluminescent生物发光TreestolightstreetsaSmog﹣FreeTowertocleanBeijing'spollutedair.andGatesofLight.whichusestheheadlampsofpassingcarstolightupthe60floodgatesoftheAfsluitdijkamajordamintheNetherlands.Nowheishopingtousehisskillstosolveapressingglobalproblem﹣spacejunk! Scientistsguessthatthereareover500000bitsoflargerubbish.TodealwiththeproblemRoosegaardeintendstoachievehisgoalbyeducatingthepublicabouttheneedofthesituationandcomingupwithpossiblesolutions.Theplan.calledtheSpaceWasteLab.startedinOctober2018withalaser激光showintheNetherlands.TheuniqueoutdoorartworkofLEDsusedreal﹣timetrackinginformationtopointatpiecesofspacejunkfloatingataltitudesof200to20000kilometers.Theexperiencewasdesignedtomakethepublicknowmoreabouthowmuchspacejunkthereare. Tofindasolutionthedesignerhasbeenthinkingwithexperts.OneoftheprojectsbeingconsideredisShootingStarswhichattemptstoreintroducethetrashtotheatmosphereinacontrolledway.Uponreentry.thewastewouldburnintheatmospherelikeashootingstar.Roosegaardeenvisagesthatifsuccessful.burningspacetrashcouldsomedayreplacefireworksatlargepublicevents! InSeptember2018.theRemoveDEBRISsatellitesuccessfullysentanettocatchatargetwhileorbitingatanaltitudeofabout300kilometers190miles.Sometimethisyear.thecapsulewillsetfreeaharpoonthathasbeendesignedtoremovespacetrash.AttheendofitstaskRemoveDEBRISwillletgoasailtobringthesatelliteitself.and.hopefullysometrashbackintotheatmosphere.whereitwillburnup. 1WhatcanweinferaboutDaanRoosegaarde? A.Heistooaggressivetoputforwardgoodplans. B.Heiscreativeinsolvingenvironmentalproblems. C.Heisfondofspendingallofhistimeseekingartskills. D.Heissensitivetoartreflectedinenvironmentalprojects. 2WhywasalasershowheldinOctober2018? A.Toconfirmreal﹣timeinformationaboutspacetrash. B.ToshowthegreatbeautyofLEDtocommonpeople. C.Toraisepublicawarenessoftheamountofspacetrash. D.Toinspirepeopletoconsiderthesolutiontospacetrash. 3Whatdoestheunderlinedwordenvisageinparagraph3probablymean? A.Suspect. B.Demand. C.Advise. D.Imagine. 4Whatisthefunctionofasail? A.Bringingthesatellitetoatmospheretoburn. B.Keepingtrashtravelingalongitsownorbit. C.Takingthesatelliteawayfromatmosphere. D.Removingspacetrashoutofthecapsule.
PTSD战后创伤issadlyacommonaffliction折磨formanysoldierswhohavewitnessedconflictaninvisiblewoundthatcontinuestocauseincrediblesufferinglongafterthegunshavefallensilent. AlotofuscomehomewithoutrealizingwearebringingthewarhomewithussaidJoshMarinoaveteran退伍兵oftheIraqwarwhosufferedtheeffectsofPTSDofsuicide. Ididn'twanttodealwithitanymoreMarinosaid.Hewroteagoodbyenotegrabbedaknifeandwentoutsideforafinalcigaretteintherain.Butthenfromthedeepestdepthofdespaircamehope.Meowingoutofthebushesnexttohimcameastrayblackandwhitekitten小猫whichaccordingtoMarinojustwalkedupandstartedrubbingupagainstmylegandletmepethim.IcametolifeagainandIbrokedowncrying.Iburstintotears. Fromthisaccidentalencountereverythingchanged.MarinofoundanewpurposeinlifethroughthefriendlycatwhohenamedScoutandwhohecreditswithsavinghislife.IstoppedthinkingaboutallmyproblemsandstartedthinkingaboutallhisproblemsandwhatIcoulddotohelphimMarinosaid.Thebondbetweenthemwasinstantbutthatwasn'ttheendofthestory. MarinohasmadeavideoofhisandScout'sremarkablestoryofhealingandheartbreakwhichyoucanwatchontheInternet.Thestoryisdedicatedtoshowinghowanimalscanhelphumansthroughtoughtimesaswellashumanscanhelpthem.Itisabeautifulstorythatissuretotugatyourheartstringsshowingjusthowpowerfulthebondbetweenhumansandanimalscanbe.Weloveitandwehopeyoudotoo! 1Whatcanwegetfromthefirsttwoparagraphs? A.TakingpartintheIraqwarhadbadeffectsonJoshMarino. B.JoshMarinowoundedbadlyduringtheIraqwar. C.PTSDisakindofdiseasewhichcannotbecurednow. D.PTSDusuallyhappensafterthesoldiersdroptheirguns. 2WhydidJoshMarinosuddenlyburstintotearsaccordingtothepassage? A.Hejustcouldn'thelpcrying. B.Thelittlecatgavehimhopetotreasurelife. C.Thewildlittlecatattackedhimsobadly. D.Hesuddenlyrealizedthatthecatcametohelphimonpurpose. 3Whatisthebesttitleforthepassage? A.PTSD﹣adiseasecuredbyasoldier. B.Themanandthecat. C.Arescuebetweenasoldierandacat. D.Howcanacatbeusedtostopsuicide.
VolunteersarevitallyimportantforMelbourne'stourism.TheyprovideinformationonMelbourneforaroundtwomillionvisitorseachyear.TheirloveandknowledgeofthecityaddtoMelbourne'sreputationasafriendlywelcomingandculturallyvibrantcity.Ifyouwouldliketoreceiveanemailadvisingyouonthenextrecruitment招募sessionpleaseemailtourism@melbourne.vic.gov.au.TheCityofMelbourne'stourismbranchgenerallyconductstwovolunteerrecruitmentintakeseachyearforthefollowingtourismprograms*CityAmbassadors*MelbourneVisitorBoothatBourkeStreetMall*MelbourneVisitorCentreatFederationSquare*MelbourneGreeterServicePlacesarelimitedandpotentialvolunteersmustparticipateinaselectionprocessbasedonthefollowingcriteria.Volunteersmustbe*passionateaboutMelbourne*customerservicefocused*familiarwithcomputer*availableforonefour﹣hourshift轮班eithermorningorafternooneveryfortnightforaminimumofoneyear*teamplayerswholovemeetingpeople*abletodemonstrateacommitmenttotheCityofMelbourne'svaluesMoreinformationTofindoutmoreaboutbecomingavolunteercontactusonlineorphonetheCityofMelbourne'sVolunteerProjectOfficerTourismMelbourneon0396589658.ForothervolunteeringopportunitiesseenationalvolunteerrecruitmentwebsiteGoVolunteer.1WhichofthefollowingisNOToneofthequalificationstobeavolunteer?A.Beingwillingtocooperate.B.Havingcomputerskills.C.Beingabletodoshiftworkeverynightforayear.D.HavingpassionforMelbourne.2Howcanyougetothervolunteeringchances?A.Byemailingtourism@melbourne.vie.gov.au.B.Byseeingnationalvolunteerrecruitmentwebsite.C.ByphoningtheCityofMelbourne'sVolunteerProjectOfficer.D.BycontactingTourismMelbourneonline.3Whereisthetextmostprobablytakenfrom?A.Agovernmentwebsite.B.Aradioreport.C.Abookreview.D.Ageographytextbook.4Whatmaybethebesttitleforthetext?A.GuidetoTouringinMelbourneB.WelcometotheCityofMelbourne!C.DoesVolunteeringPayBack?D.TourismVolunteerProgram!
Pictureaniceberg冰山.You'llprobablyimaginesomethingwhiteassnowrisingupoutofabluesea.Buticebergscanbeallsortsofshades.Theycanbefromafrostybluetoanattractivegreen. Researchersandsailorshaveobservedemerald翠绿色icebergsforyears.Alargepieceoficemast﹣highandgreenasemeraldevenappearsinSamuelTaylorColeridge's1834poem.Buttheyhaven'tfoundoutexactlywhytheseicebergslookthewaytheydo. AnewpaperledbyStephenWarrenwaspublished.Itallhastodowithwhaticebergsaremadeoutof.Icebergsbreakoffglaciers冰川oriceshelveswhichhappensmainlyaroundAntarcticaandGreenland.Theybegintheirlivesassnowfallthataccumulatesovertime.So.icebergscontainairpocketswiththeformofbubblesthatspreadlight.Withsomeexceptionsandrarelinesglaciericetendstolookbluishwhite. AtfirstWarrenguessedthatthegreenwasaproductofmeltcarbon.Anditcamefromrottingplantsorseaanimals.Butsamples样本didn'tproveit.AnotherideastartedtotakeshapeaftertheyhadfoundahighconcentrationofironinasampleofseaicefromtheAmeryIceShelf. Whenglaciersrubacrosslandtheyproducewhat'sknownasglacierflour.Itisaproductofbedrockbeinggroundclownbythemovingmass.Asglaciersmoveawaytheseremainsareusuallywashedoutintowater.inparticlessometimestoosmalltobenoticeabletoyoureyes.Butonland.soilandrockscontainironoxidesthatoftenhaverosycolors.likeredsyellowsandbrowns﹣andsincetheseaicecontained500timesmoreironthantheglaciericeWarrenwonderedwhethertheremainswereresponsibleforicebergstakingonagreenappearance. Hedoesn'tknowforsure.He'shopingtosecuremoneysothathecanreturntotheareaandstudytheicebergsthemselves. 1WhyisSamuelTaylorColeridge'spoemmentionedinthetext? A.Ittellswhyicebergslookthewaytheydo. B.Itdescribesvividlywhaticebergsarelike. C.Itsayscausesoftheappearanceoficebergs. D.Itprovestheexistenceofcolorfulicebergs. 2WhatcanweknowaboutStephenWarren'spaper? A.Itdrawsonresearchers'andsailors'views. B.Itistherecordofthemovementoficebergs. C.Ittalksabouthowicebergscomeintobeing. D.Itisacollectionofvarioussocialphenomena. 3Whatdoestheunderlinedworditinparagraph4referto? A.Asampleofseaice. B.Warren'sfirstguess. C.Warren'sideaoniron. D.Aproductofmeltcarbon. 4Whatisparagraph5mainlyabout? A.Thepossiblereasonwhyicebergslookgreen. B.Wheremostoficebergseventuallydisappear. C.Howicebergstakeinthecolorsfromglaciers. D.Thewayinwhichicebergsbreaksoffglaciers.
如图在2×2的网格中以顶点O为圆心以2个单位长度为半径作圆弧交图中格线于点A则tan∠ABO的值为.
Whenadisasterstrikeshumanitarianagencies人道主义机构likeTheWorldFoodProgrammeWFPneedinformationmorethananythingelse.Theyneedaclearpictureofthedamagetoroadsandbridgesforexampletobeabletotakequickaction. WFPhaspublishedapictureofdamagetotheepicenter震中oftheearthquakewhichstruckHaiti.Thepicturewhichhasbeenproducedintheformofasatellite﹣basedmapshowsgreatdamagetotheepicenterwhere90%ofthebuildingsweredestroyed.Inthemaponepixel像素standsforhalfameterofland.That'saverycloselookofhowthingsareontheground.Ithelpedrescueteamsalot. WFP'sEmergencyPreparednessandResponseBranchproducedaseriesofclearmapsshowingthedamageofHaiti.ThemapshavebeenproducedinpartnershipwitharesearchanddevelopmentinstitutecalledInformationTechnologyforHumanitarianAssistanceCooperationandActionITHACA.TheorganizationwassetupyearsagoespeciallytoworkwithWFPinbringingdevelopmentsofsatellitetechnologyintoitsresponsetodisasters.Justafewyearsagothiswouldhavemeanthavingtowaitforhelicopterstooverflyareasandforhumanbeingstophysicallyseethedamage.Thesatelliteswhichoperatearoundhighaboveourheadsareofgreathelp.Theyareabletoseethroughcloudswhichishelpfulwhenweatherconditionspreventtheuseofopticalinstruments光学仪器. NowbothWFPandITHACAhaveteamsworkingaroundtheclocktomakeuseofmorenewtechnologiestohelppeopleactivelydealwithnaturaldisasters.Deathsandinjuriesfromnaturaldisasterscanbereducedifthedisastercanbepredicted.Severaldisasterpredictiontechnologieshavebeendevelopedovertheyears.WearealsoworkinghardtoprovideamoreeffectiveinstrumenttopredictnaturaldisasterssaidRiccardoRoscellipresidentofITHACA. 1AccordingtoParagraph1whatdoesWFPextremelyneedafteradisaster? A.Doctorsandvolunteers. B.Medicalandfoodsupplies. C.Theinformationaboutthedamage. D.Thedetailsaboutthecausesofthedisaster. 2WhatdoestheauthormainlywanttoshowuswhenhementionstheHaitianearthquakeinParagraph2? A.Thesatellite﹣basedmapisuseful. B.Itwasaveryseriousearthquake. C.Itcausedmanyinjuriesanddeaths. D.Thepictureofthedamageisunclear. 3Whatistheuniqueadvantageofthesatellitescomparedwithopticalinstruments? A.Theycanbeusedasthesubstitutionofhelicopters. B.Theycanreducedeathsandinjuriesfromnaturaldisasters. C.Theycanbeoperatedaroundhighaboveourheads. D.Theycanseethroughcloudsinbadweatherconditions. 4WhatcanwelearnfromRiccardoRoscelli'swordsinthelastparagraph? A.Itisnoteasyforpeopletopredictnaturaldisasters. B.Naturaldisasterscancausemoreterribleconsequences. C.Theyaretryingtofindoutabetterdisasterpredictioninstrument. D.Theyhavestudieddisasterpredictiontechnologiesforyears.
HalloweenComingOut Amanwasshotinthefaceduringabankrobbery.Thatwasthenewsaboutmefiveyearsago.FromthenonIneverlookedina1itevenscaredmyselfwhenseeingmydestroyedface.Ilivedinmyhousealonewithoutoutsidecontact.ButonenightIwasmakingan2.ItwasHalloween. Whatafittingnightformeto3!Ilongedforhumancontact.WhenmypumpkinlanternsmiledatoothywelcomeinmyfrontdoorIheardfootstepsandgiggling咯咯的笑aschildrencameclosetomyhouse. Trickortreattheycried. Myhandsstartedto4.Iopenedthedoorandgavethema5smilethroughmydamagedlipsbeneatharoughscarwheremynoseonce6. Doyouwantatrickordoyouwantatreat?Myvoicesoundedmorelikeaghost.The7expressiononthechildren'sfacessuggestedeverything. Treat!They8pickedacandyortwofrommybucketandrantothe9oftheirparents. Iclosedthedoorandpressedmybackagainstit.IfeltdizzybutI10it.Thenthebellrang.Trickortreat.a11voicecametome.IopenedthedoortofindasmallgirlwearingaShirleyTemplemask. HiShirley.Ispokequietlynotto12her.Aren'tyoubeautifultonight? ShestaredatherfeetandshookherheadNo. Yesyouare.You'reShirleyTemplethemostbeautifulgirlintheworld. Shelookedupatmeandpulledher13totheside.Seeingherdeformed变形的facemyheartmissedabeat. WellIthinkyouarebeautifuldarling.Isaidgently. Atthewordshereyesconnectedwithmine.Anuncertainhandreachedtowardmybucketandtookonepieceofcandy.Thankyou.Hervoicewasa14.Sheturnedandrantohermother.Inoddedmyheadtohermotherandgavethembotha15. Iclosedmydoorandturnedoffmygatelamp.My16lifebeganagain. ThenextmorningIheardmydoorbellring.Itriedtoignoreit17itrangagain.IwenttothedoorandcalledoutWho'sthere? It'sShirleyTempleandherMom. Iopenedthedoorinafew18andlooked.Itwasthewomanandherdaughterwithouthermask.BeforeIspokethemothersaidMygirlsaidshewantedtomeetyou.Iwatchedtearsstartto19inthemother'seyes.Thisisherfirsttimeoutsidewithouthermask. Ipulledthedooropenandthatwasalsothefirsttimeinfiveyearsformetoinvitesomeoneintomy20. 1A.mirror B.wallet C.pocket D.bank 2A.expectation B.appointment C.introduction D.exception 3A.act B.stay C.appear D.flee 4A.shake B.cross C.dance D.tap 5A.bitter B.friendly C.simple D.quiet 6A.lived B.sat C.breathed D.slept 7A.moved B.excited C.shocked D.puzzled 8A.easily B.politely C.sadly D.quickly 9A.security B.shadow C.defense D.sight 10A.finished B.promoted C.got D.did 11A.thin B.loud C.claim D.clear 12A.interrupt B.scare C.discourage D.cheat 13A.gloves B.hat C.mask D.glasses 14A.whistle B.whisper C.signal D.sigh 15A.glance B.wave C.hand D.surprise 16A.busy B.social C.meaningful D.lonely 17A.for B.so C.but D.or 18A.seconds B.efforts C.inches D.steps 19A.well B.dry C.freeze D.fix 20A.future B.story C.mind D.life.
Screamifyouwanttochargeyourphone.ThankstothewondersofscienceridersonThorpePark'snewattractionarollercoaster过山车calledTheWalkingDeadcannowpowertheirsmartphonesbyscreamingloudly.That'sbecausetherearedevicesonitthat'harvestkineticenergy'动能.Theparkconductedresearchwhichshowsthatmillennials'biggestfearistheirphonesrunningoutofbatterysothedeviceshouldprovepopular.AlloftheWalkingDead'scarriageshavebeenfittedwiththeharvestingdeviceswhichnotonlyharvesttheenergyofscreamsbutthatfromg﹣forceandvibrations振动too.Theunitsarethenremovedfromthecarriagesbystaffanddepositedintoanon﹣sitemobilechargingpoint.ThorpeParksaid'Ifthrill﹣seekersarebraveenoughtoopentheireyestheywillseeasetofLEDlightsinbloodredpoweringupasguests'screamsbecomelouderthroughoutthespine﹣tingling90﹣secondexperience.'DesignedandinstalledbyresearchersatQueenMaryUniversityLondonandtheengineeringteamatThorpeParkResortthetechnologytookthreemonthstoimplement执行fromdesigntoinstallation.Itwillbeavailableatthethemeparkforaninitialtrialperiod.Ifthisprovessuccessfulthetechnologymaybecomeapermanentfixturefortheremainderofthe2018season.ThorpeParkResort'sJohnBurtonwhocameupwiththerideconceptsaid'TheWalkingDeadTheRideis15outof10onthescarefactorscale等级soitmakessensetobeabletocombineandusethepowerofourvisitors'screamsandtheride'svibrationstohelpsolveaproblemeachandeveryoneofusfaces﹣losingthechargeonourmobileswhenwe'reonadayout.'DrJoeBriscoeSchoolofEngineeringandMaterialsScienceatQueenMaryUniversityofLondonsaid'Thisisanexcitingconceptthatwillundoubtedlybeusedmorefrequentlyinthefuture.Thesystemusesaminienergyharvestertocapturethekineticenergytransferringittoaseparateelectricalcircuitandstorageunitwhichisenoughtochargeamobilephone.'1Wecanlearnfromthetextthat.A.aphoneshouldbeputintherollercoastertobechargedB.itwasJohnBurtonwhodesignedandinstalledthedeviceC.theenergyofscreamsg﹣forceandvibrationscanbeharvestedbythedeviceD.thetrialperiodofthetechnologywilllastthreemonths2Whatdoestheunderlinedword'spine﹣tingling'meaninParagraph4?A.Unforgettableandsatisfying.B.Interestingandinspiring.C.Exhaustingbutdelightful.D.Frighteningbutexciting.3WhatisDrJoeBriscoe'sattitudetowardthefutureofthenewconcept?A.Skeptical.B.Optimistic.C.Critical.D.Neutral.4What'sthemainideaofthetext?A.Thetraditionalwayofchargingyourphoneisonthewayout.B.Anewbatteryforpoweringyourphoneisinvented.C.Visitors'screaminThorpeParkcanbeusedtochargethephone.D.ThemosteffectivewayofchargingyourphonehasbeenfoundinThorpePark.
Theideaofrobotrulersfriendsandlovershasbeenatopicofsciencefictionnovelsforyears. Butaccordingtoonemathematicalmodelofhowourbrainscreateconsciousnessemotionalmachineswillneverexist. Thisisbecausecomputerscan'thandleanyprocessthatcompletelyintegrates整合informationsotheycannotbeconsciousorfeeloneexpertsays. AmathematicalmodelforconsciousnessdevelopedbyGiulioTononiattheUniversityofWisconsin﹣Madisonsaysthattheabilitytointegrateinformationisakeyfeatureofconsciousness. Hebelievesthatintegratedinformationcan'tbebrokendownintosmallerpiecesinconsciousmindsbecausethebraincontextualizes将……融入背景information. Forexamplewhenweseearedcircleourbrainsdon'tseetheshapeasacolourlesscircleplusashapelesscolouredareaNewScientistreported.Insteadweseeitasawhole﹣aredcircleweunderstandthewiderpicture. It'seasyenoughformachinestoeditacollectionofindividualimages图象butmemoriesaremadeupofabankofintertwined相互交织的imagesandexperiencesandcannotbechangedinthesameway. Researchershaveusedmathematicstoshowthatcomputerscannothandlethecomplexprocessesneededtofitpiecesofinformationtogetherperfectly. Thereforeifconsciousnessisbasedontheintegrationoflotsofpiecesofinformationcomputerscan'tbeconsciousandcan'texperienceemotionslikehumans. ProfessorPhilMaguireoftheNationalUniversityofIrelandinMaynoothsaysthatconsciousnesscannotbecreatedinaphysicalmachineinlimitedtimeusinglimitedmemory. Itdoesn'tnecessarilymeanthatthereissomemagicgoingoninthebrainthatinvolvessomeforcesthatcan'tbeexplainedphysically.Itisjustsocomplexthatit'sbeyondourabilitiestochangeithesaid. Hisresearchmaymeanthatlonelyhumanswillnotfindlovewitharobottheyareunlikelytobemadetheirslaveseither. 1Whydoexpertsthinkemotionalmachineswon'texist? A.Machinescan'tsolveproblems. B.Machinescan'tintegrateinformation. C.Machinescan'thandleinformation. D.Machinescan'tcommunicatewithpeople. 2TheexamplementionedinParagraph6isusedtoshow. A.machinescannotfeel B.thebrainhasconsciousness C.machinescanrecognizeshapesandcolors D.thebraincancontextualizeinformation 3Itcanbelearnedfromthetextthat. A.theideaofrobotloverswon'tcometrue B.machinescaneditintertwinedimages C.robotscanfitpiecesofinformationtogetherperfectly D.computerscanexperienceemotionslikehumansoneday 4Whatwouldbethebesttitleforthetext? A.Howrobotswork B.Robotswillneverhavefeelings C.Willrobotsbecomepeople'sfriends? D.Whatwillrobotsbelikeinthefuture?
AfewyearsagomywifeandItookatriptoCostaRica.Uponarrivalwe1acarandheadedouttoourfirstdestinationwhichwasafewhoursaway.Ihada2soIfiguredI'dbeingreatcondition.About20minutesintothedriveIfoundmyselfpractically3intheunmarkedstreetsanddirtyroads.Upset.IturnedtoSiriavirtual虚拟的assistantinmyphoneforhelp. Itypedthe4toourdestinationinmyphoneandinstantlySirihad5thebestroute路线togetthereandwewereonourway. Theonly6wasthatthingsdidn'talwaysgothewayIthoughttheywould.Withthestreetsnotbeingwell7Iwouldsometimesmissaturnandheadinthe8direction.LuckilySirinevergot9withme.AnytimeImissedaturnSiriwouldsimply10andsayRecalculatingroute.11route.AndwithinafewsecondsSiriwouldhaveanewroute12togetustoourdestination. SometimesthenewroutemeantIhadto13totherightturnandsometimesshefoundadifferentroutethattookmynewlocationinto14Eventuallywemadeittoourhotel15andenjoyedsomebeautifulsceneryalongtheway. Mostpeoplemakethe16ofthinkingthatsuccessandhappinesscomefromsomeonesettingagoalandthen17straighttowardsit.The18isthatthereisnostraightpathtosuccess.Thereisn'teventhe19path.Therearemanypathsthatcangetyoutoyourgoals.Youjusthavetobe20torecalculateyourroutewhenyoumissaturnorthereissomethinginyourway. 1A.produced B.repaired C.rented D.purchased 2A.car B.phone C.compass D.map 3A.absorbed B.lost C.experienced D.free 4A.address B.approach C.receipt D.schedule 5A.polished B.discovered C.opened D.managed 6A.fear B.difference C.sympathy D.problem 7A.marked B.paved C.arranged D.expanded 8A.illegal B.new C.wrong D.potential 9A.generous B.mad C.concerned D.cautious 10A.breakdown B.cutin C.getup D.goaway 11AAbandoning B.Cancelling C.Reaching D.Changing 12A.checked B.updated C.adjusted D.planned 13A.point B.lead C.return D.apply 14A.order B.direction C.account D.place 15A.safely B.frequently C.hungrily D.gradually 16A.mistake B.excuse C.accident D.trouble 17A.accumulating B.withdrawing C.marching D.fleeing 18A.answer B.truth C.condition D.privilege 19A.first B.suitable C.accurate D.only 20A.willing B.proud C.anxious D.ambitious
今年5月份十八中九年级学生参加了中考体育模拟考试为了了解该校九年级1班同学的中考体育情况对全班学生的中考体育成绩进行了统计并绘制以下不完整的频数分布表和扇形统计图根据图表中的信息解答下列问题 1求全班学生人数和m的值. 2求扇形统计图中的E对应的扇形圆心角的度数 3该班中考体育成绩满分共有3人其中男生2人女生1人现需从这3人中随机选取2人到八年级进行经验交流请用“列表法”或“画树状图法”求出恰好选到一男一女的概率.
如图数轴上表示的是某个函数自变量的取值范围则这个函数解析式为
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