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如图是由几个相同的正方体搭成的一个几何体,从正面看到的平面图形是( )
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如图是由一些相同的小正方体搭成的几何体的三视图搭成这个几何体的小正方体的个数有
2个
3个
4个
6个
如图是由几个相同小正方体搭成的几何体的主视图与左视图则该几何体最少由个小正方体搭成.
由一些大小相同的小正方体搭成的几何体的主视图和俯视图如图所示则搭成该几何体的小正方体最多有_____
由几个小正方体搭成的几何体其主视图左视图相同均如图所示则搭成这个几何体最少需要________个小正
一个几何体是由若干个相同的正方体组成的从其正面看和左面看都是三个横排的正方体搭成这样的几何体至少需要
如图是由一些相同的小正方体搭成的几何体的三视图那么搭成这个几何体的小正方体的个数为
5个
6个
7个
8个
如图是一个小正方体块搭成的几何体从上面看到的图形正方形中的数字表示在该位置小正方体的个数请你画出它从
如图是一个由若干个小正方体搭成的几何体从上面看到的形状图其中小正方形内的数字是该位置小正方体的个数请
如图由几个相同的小正方体搭成的几何体的主视图和俯视图组成这个几何体的小正方体的个数最多是
7个
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如图所示是由若干个完全相同的小正方体搭成的几何体的主视图和俯视图则这个几何体可能是由个小正方体搭成的
如图是由几个相同的小正方体搭成的几何体的三视图则搭成这个几何体的小正方体的个数是
4个
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如图是由若干个小正方体搭成的几何体从正面左面上面看得到的形状图那么此几何体是由________个小正
一个几何体由几个大小相同的小正方体搭成其左视图和俯视图如图所示则搭成这个几何体的小正方体的个数是
3
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如图是由一些相同的小正方体搭成的几何体的三视图搭成这个几何体的小正方体的个数有
2个
3个
4个
6个
如图所示是由几个小正方体搭成的几何体请画出这个几何体从三个不同方向看到的图形.
一个几何体由几个大小相同的小立方块搭成从上面观察这个几何体看到的形状如图所示其中小正方形中的数字表示
如图是由一些相同的小正方体搭成的几何体的三视图搭成这个几何体的小正方体个数是
2个
3个
4个
6个
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一个由小正方体摆成的几何体无论从正面还是从左面都可以看到如图所示的图形请你判断一下最多可以用几个小正
如图是由几个相同的小正体搭成的几何体的三视图则搭成这个几何体的小正方体的个数是
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MyclosechildhoodfriendHowardAllenbroughtusgoodnews.Hespentthelasteightyears1nightschooltogethisbachelor'sdegreewhileworkingafull﹣timejob.Afteryearsoflate2andweekendsofdoingcourseworkandstudying3hegraduatedlastmonth. Heremainedinourhometownafterhighschoolbutmostofhis4myselfincludedleftour5tootherstatesforuniversityandemployment.Overtimenewfoundresponsibilitiesfamiliesandotherthingshavemadeit6thatwe'rebackinourhometownatthesametime. Oneofourmutual共同的friends7awonderfulidea.Wemadeaweekendplanthat8we'dallflybacktoourhometownto9himandcelebratehisaccomplishment. Wecontacted联系Allen'smomand10howtohaveAllencometothesurprise11party.Wedecidedthathismomtoldhimthathewasgoingtohavedinnerwithjusthis12tocelebrate.Littledidheknowthatthedinnerwould13a20﹣personaffairwithhisoldfriendspresentfromalloverthecountry!MeanwhileAllenlikescakesverymuchandI14abigonewhoseflavorwashis15whichIknewfrommychildhood. WhenAllen16tohavedinnerwithhisgrandparentshewas17surprisedandmoved.Hetoldushowmuchit18tohimthatweallflewintomakehimfeel19.Itwasobviousthatthepartywasagreat20butthatwaswhatweshoulddo.Asisoftensaidwhateverisworthdoingatallisworthdoingwell. 1A.building B.attending C.repairing D.cleaning 2A.days B.mornings C.afternoons D.nights 3A.finally B.quickly C.strangely D.naturally 4A.sisters B.brothers C.friends D.teachers 5A.office B.hometown C.company D.job 6A.famous B.rare C.familiar D.fun 7A.liked B.remembered C.hatched D.knew 8A.insecret B.byluck C.inreturn D.bychance 9A.invite B.find C.surprise D.face 10A.showed B.answered C.watched D.discussed 11A.Christmas B.birthday C.graduation D.business 12A.relatives B.grandparents C.colleagues D.classmates 13A.turninto B.gothrough C.dealwith D.careabout 14A.discovered B.received C.drew D.ordered 15A.favorite B.plan C.dream D.design 16A.stopped B.arrived C.waited D.expected 17A.totally B.frankly C.suddenly D.normally 18A.described B.explained C.suggested D.meant 19A.calm B.confident C.brave D.special 20A.invention B.devotion C.success D.medal
TheChinesePeople'sLiberationArmyNavyturned70onApril232019.Itisatimeforreflectingonitsbeginningandhowoverthepastsevendecadesithasovercomesomanydifficultiestogrow1amodemnavalforce. AsamajorPacificcountry2hasmorethan18000kilometersofcoastlineChinaneedsapowerfulnavalforcethatcantimelyrespondtochallengesandrisks.ThePLANavyisincreasinglybeinglookeduponasanessentialforce3defendthecountry'sinterestsandprotectitsnationals'personalsafetyand4possessionoverseas. ThusthecallsforChinatobuildablue﹣seanavyhavebecomestronger5thePLANavyhasapparentlyaccelerateditsmodernizationstepstryingtoincreaseitsbattleabilitiesandreadiness.Nottomentionthatthenavyalsohasthedutytomore6effectiverespondtochallengestothecountry'smaritime海上的interestsandterritorialintegrity领土完整. HoweveraspartofChina'sdefenseforcesthePLANavyisaforcefor7peacepurposesThePLANavyhasalsoactivelyparticipatedininternationalhumanitarianmissions使命and8conductvariousexchangeswithnavalforcesfromothercountriestobuildunderstandingand9strengthtrust. SowehavereasontobelievethatthePLANavy10contributebettertoworldpeaceanddevelopment.
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Ihavebeenluckyenoughtoberightnexttodolphinsplayinginperfectsurfusingthepowerofthewavestotravelevenfasterthantheynormallyswim.ThereisnodoubtthattheyareenjoyingthemselvesandthoughIcan'tswimlikeadolphin1. Bodysurfinginvolvesridingonawavewithnohelpfromanydevice装置suchasasurfboardwhichmakesitthepurestformofsurfing.Infactitisoneofveryfewextremesports﹣freeclimbingandcliffdivingareothers2. Howeveritismoreenjoyableandsaferifyouuseflippers脚蹼.Thisisbecausetheyenableyoutoswimfasterandsocatchwavesandsurfalongthemmoreeasily.3Anotheraidisahandboardamini﹣surfboardaboutthesizeofanironheldinonehandtogeneratemorespeedalongthewave. Tocatchawaveswimtowherethewavesbreakandasoneapproachesstartswimmingtowardsthebeach.Youmusttrytotravelatthesamespeedasthewaveandifyoudoitcorrectlyyouwillfeelthewaveliftingyouandpushingyouforwards.4 Bodysurfingisnotaprofessionalsport5thePipelineBodysurfingClassic﹣﹣heldeachyearatthelegendaryBanzaiPipelineinHawaii.LocalbodysurferscompeteagainstathletesfromplacessuchasAustraliaBrazilJapanorFranceinterrifyingwallsofwaterabovethesharpcoralreef. Formenoothersportisasmuchfunasbodysurfing.There'sagoodreasonwhydolphinschoosenottousesurfboards! A.Thentryandsurfalongthesurfaceofthewave B.Icanexperiencethissamefunwhenbodysurfing C.butitdoeshaveitsownunofficialworldchampionship D.thatcanbepractisedbyusingnothingbutthehumanbody E.whichislookeddownonbyprofessionalathleteshowever F.Famousbodyboardersinthegreatsurfinghistoryhavealsocompeted G.Awetsuitisalsoadvisabletouseunlessyouarebodysurfingintropical热带的seas
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KindleE﹣reader8thgeneration FreeTouchscreenDisplay Price:﹩79.99 ●Thinandlightforone﹣handedreading NewKindleis11%thinnerand16%lighterthanthepreviousgenerationKindlemakingiteasyandcomfortabletoholdinonehand. ●ReadlikerealPaper Kindlecreatestextsimilartowhatyouseeinaphysicalbook.Theblacksandwhitesonthescreenareuniformimprovingtextandimagequality. ●Long﹣lifebattery Kindledoesn'tneedpowertoshowapageoftextallowingyoutoreadforweeksonasinglecharge. ●Thousandsofbooksnodistraction分心 Kindleisdesignedtobeane﹣reader.Itsatisfiesyourloveofreadingwithoutinterruptionslikee﹣mailsandphonecalls. ●Lookitupwithoutleavingyourpage SmartLookupcombinesentriesfromTheNewOxfordAmericanDictionarywithinformationfromWikipediasoyoucanknowmeaningscharactersandmorewithoutlosingyourplace. ●Adjustyourtextsize Choosefromeighttextsizestopreventtiredeyessoyoucankeepreadinglonger. Customerreviews: ※DamonMay212019 Thepriceisgreatwithanextra﹩20offandthisnewKindleissmallerinmyhandsthanmyoldone.IwassadtolosemyoldKindlebutthisoneisterrific. ※JasonJanuary262019 ImisstheoriginalKindlerssize﹣thisoneistoosmall.Alsothescreenisoverlysensitiveandthingspopup弹出andthebatterydoesn'tlastaslongastheoriginalKindle.ButmybiggestdisappointmentisthatthisKindledoesn'tallowyoutotransfereverythingfromtheoriginalKindlesoIlostalloftheinformationfrommyoldone.Overalldisappointing. ※SusanNovember172018 IhadtheoriginalKindleandthebatterylastedforweeks.Thisbatteryonlyseemstolastafewdayshowever.TheotherproblemIhavewiththisversionoftheKindleisthetouchscreen.Itisannoyingwhenyouarereadingandstartturningthewrongway.Sometimesit'shardtogetthepagetoturnthewayyou'dlikeitto. 1Whichisafeatureofthe8th﹣generationKindle? A.Itis16%thinnerthanthepreviousone. B.Itisuser﹣friendlywithabuilt﹣indictionary. C.Itcanrunforseveralmonthsonasinglecharge. D.Itisdesignedtoreceivee﹣mailsandmakecalls. 2InwhichwaydoesJason'snewKindlebotherhimmost? A.Itsscreenismuchtoosensitive. B.Itisnotaslargeasheexpected. C.Itsbatterylifeisn'taslongashisoriginalone. D.Documentscan'tbetransferredbetweendifferentKindles. 3WhatproblemdoJasonandSusanhavewiththeirnewKindle? A.Therearealwaysmessagespoppingup. B.Ifsdifficulttoturnonthetouchscreen. C.Pageturningdoesn'tworkwellsometimes. D.Thebatterylastsshorterthantheoriginalone.
Parrotshavebeenknowntomimicwordsbuthaveyoueverthoughthowtheycommunicate?Thesoundstheymakemaysoundmeaninglesstousbutnewresearchhasfoundthatwildparrotsareactuallygivennamesbytheirparents. AccordingtoastudyledbyKarlBergofCornellUniversityintheUSnestlings雏鸟aregivenauniquesoundoftheirownwhichstayswiththemfortheirentirelives. Inthestudytheteamplacedhiddencamerasinthenestsof17differentwildparrots.Afterstudyingtheirsoundstheteamfoundslightdifferencesinthecallsparentsusedtocommunicatewitheachchick.Andevenbeforethenestlingshadlearnedtocommunicateproperlythebabybirdsseemedtorecognizeandmimictheircalls. Soundsverysimilartohumansdoesn'tit? Thestudyalsoprovedthatthesesignaturecallsareacquiredsociallynotgenetically.Todothisscientistsswitchedtheeggsinnineofthe17nestssothathalfoftheparrotswereraisingnestlingsthatwerenottheirs.Usingtherecordingsthescientistsconcludedthenestlingsallusednamessimilartothosetheparentswhetherbiologicalornonbiologicalcalledthemforthefirstweeksoftheirlives.LucieMcNeilfromNationalGeographicsaidthiswouldbethefirstprovenexampleofanon﹣humanspeciesteachingacoustical声学的communication. LeadscientistforthestudyKarlBergtoldNationalPublicRadiooftheUSMostpeoplesay‘Wellallthosecallsarejustnoise'butIthinkthey'rehavingconversations. WhenaskedwhatelsetheparrotsmightbesayingBergrepliedThetheoryisthatthesebirdsaredecidingwherethefoodis.Dowewanttogo3kmNorth﹣northwest?Dowewanttogotothatfield?'Theyaresortofarguingordiscussing.NaturalscienceauthorVirginiaMorellwrote:Verygraduallyscientistsarelearningtounderstandtheconversationsofverydifferentanimalsthatlivelivesrichwithplansquarrelsandromance. Youneverknowifthescienceofanimaltranslationkeepsadvancingwemightonedaybewatchingarealityseriesaboutparrots. 1Whatdidthenewresearchfindaboutwildparrots? A.Theycantalkbylearningfrompeople. B.Thesoundstheymakearemeaningless. C.Theyhavenamesgivenbytheirparents. D.Theyhaveauniquewayofmakingsounds. 2Whichofthefollowingmaythescientistsagreewith? A.Differentparrotsarecalleddifferentlybythetheirparents. B.Babyparrotscantellwhotheirbiologicalparentsare. C.Babyparrotscanmimictheirbiologicalparents'callsbetter. D.Parrotsarethemostskilledanimalsinacousticalcommunication. 3Whydidthescientistsswitchtheeggsinthestudy? A.Toseewhethertheparentscouldrecognizetheirownbabies. B.Toseewhethertheparrotsmadethesamesoundsalltheirlives. C.Toseewhetherthesignaturecallswereacquiredsociallyorgenetically. D.Toseewhetherbiologicalandnonbiologicalparentsnamedbabiesdifferently. 4Whichofthefollowingisthebesttitleofthepassage? A.AnewresearchintheUS B.Parrotscanreallytalk C.Conversationsofanimals D.Parrotsmakemeaninglesssounds
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Everyyearwildfiresdestroymillionsofhectaresofforestland.1Smokejumpershelptostopthis. 2Smokejumpersareaspecialtypeoffirefighter.Theyjumpfromplanesorareloweredbyhelicoptersintoareasthataredifficulttoreachbycaroronfootsuchasthemiddleofamountainforest.Theyracetoputoutfiresasfastastheycan. Atafiresitesmokejumpersfirstexaminethelandanddecidehowtofightthefire.Theirmaingoalistostopafirefromspreading.Usingbasicequipmentsuchasshovelsandaxessmokejumpersclearlandofburnablemateriallikeplantsandotherdrymaterial.3 Althoughthemajorityofsmokejumpersaremenmorewomenarejoining.439ForexamplesmokejumpersemployedintheU.S.mustbe120to200pounds54to91kilogramssotheydon'tgetblownawaybythestrongwindsorgethurtwhentheyland. Smokejumpersmustalsobecapableofsurvivinginthewilderness.InRussiamanysmokejumpersknowhowtofindfoodintheforestandevenmakesimplefurniturefromtrees.5Butforthesefirefighterssmokejumpingisn'tjustajob.Theylovebeingabletojumpoutofplanesfightfiresandliveintheforest.As28﹣year﹣oldRussiansmokejumperAlexiTishinsaysThisisthebestjobfortoughguys. A.Whatisasmokejumper? B.Howdosmokejumpersdoit? C.Moreimportantareyourheightandweight. D.Itmeanstheworkisdangerousandtakesalongtime. E.Andhomesaredamagedandthousandsofpeopledie. F.Theycarrywaterwiththemtoobutonlyalimitedamount. G.Hotweatherandfast﹣movingwindsoftenmakethesefiresmoredangerous.
Chinaishometodifferentkindsofsoybeans.In2011thesoybeanoutputofChinadropped1thefourthplacearoundtheglobe2accountforonly5.55%oftheworld'stotal.Chinanowrelies3muchonimporttomeetadomestic国内的needfortheplantthanever. ActuallyGaiJuyiisoneofthemillionsofdiligentChinesepeople4workhardtochangethesituation.Forovertwo5decadeGaiandhisteamwentintovariousfieldsacrossthecountryjusttocollectseedfromthefarmers.Noneoftheseedsisthesame.hesaid.Seedcollectionisalreadynoeasyjob.Andtheyeven6havetodelaytheprocessfromtimetotimebecauseofalackoffundingmanyofGai'sstudentsleft7industryforthesmallfinancialpayback.8Gaihasremainedinhispostandsparednoeffortsinlookingafterthepreciousseeds. ThehardworkofGaiandhisteam9finalpaidoff.ThankstothemChina'ssoybeanharvestdoubledovertheyears.TheoldmansaidIknow10mypersistencemeanswhenIseeself﹣producedtofuandsoybeanmilkonChinesepeople'stable.
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下列图形中是中心对称图形的是
假定你是李华你校将举办诵经典;学汉语ReadClassicsandLearnChinese活动你的英国朋友John对此很感兴趣发邮件向你询问有关情况请根据以下要点用英语给他回复. 1.活动时间及地点;2.诵读内容及形式;3.邀请他参加. 注意: 1.词数100左右;2.可以适当增加细节以使行文连贯; 3.开头和结尾已为你写好不计入总词数. HiJohn Yours LiHua
Canyouimaginedigginginyouryardonedayandfindingalife﹣sizedsoldiermadecompletelyofclay?That'swhathappenedseveraldecadesagowhenfarmersinXi'anChinawerediggingwells. Archaeologists考古学家havesincefoundabout6000moreofthesesoldiersalongwithhorsesweaponstoolsandotherartifacts.ThehugearmywasmeanttoprotectthetombofthefirstrulerofChina.ThefirstemperorofChinaQinShihuangaccomplishedahugeamountduringhisrule.Between221and210B.C.hestartedtheconstructionoftheGreatWall.Hebuiltalargenetworkofroads.Heintroducedanewwritingsystemcurrency货币andasetofmeasurements.Theemperoralsoorderedtheconstructionofahugearmyoflife﹣sizedterracottasoldiers.Thesehehopedwouldprotecthistombafterhisdeath. ThesoldiersinXi'an'sterracottamuseumaretodaylightbrownbuttheyweren'talways.Theybeganasanarmyofredblueyellowgreenwhiteandpurple.Sadlymostofthecolorsdidnotlasttothepresentday.Afterbeingexposedtoairduringexcavation挖掘thecoatingunderthepaintbegantofalloff.Thepaintdisappearedinlesstimethanittakestoboilaneggtakingwithitimportantpiecesofhistory. Nownewtechniquesarestartingtorevealthearmy'struecolors.Archaeologistshaverecentlydiscoveredanareawithmorethanahundredsoldiers.Manyofthesestillhavetheirpaintedfeaturesincludingblackhairpinkfacesandblackorbrowneyes.ChineseandGermanresearchershavedevelopedaspecialliquidtohelppreservethesoldiers'colors.Aftertheyfindasoldierorotherartifacts手工艺品archaeologistssprayitwiththeliquid.Theythencoveritinplastic.Archaeologistsarealsofindingcolorsinthedirtaroundthesoldiers.It'simportantnottodisturbthedirtsothecolorswon'tbelost.WearetreatingtheearthasanartifactsaysarcheologistRongBothemuseum'sleadingchemist.ThenextchallengesaysRongistofindawaytoapplythecolorstothearmyagain.OncethathappensartistscanbringEmperorQin'sarmybacktolifeinfullvividcolor. 1Theterracottasoldierswereconstructedto. A.showtheoutsideworldaboutChina'sgreatness B.beenjoyedbyeverydaypeople C.frightenChina'senemies D.protectEmperorQin'stomb 2Whatisthemainideaofthethirdparagraph? A.Thesoldierslosttheircolorsveryquickly. B.Thesoldiers'paintfelloffbecauseofthehightemperature. C.Visitorstothemuseumarenotactuallyseeingtherealsoldiers. D.Beingexposedtowaterisbadforthesoldiers. 3Whathavearchaeologistsrecentlydiscovered? A.Aplacewithoverahundredsoldiers. B.Awrittendescriptionofthesoldiers'truecolors. C.Aspecialliquidinthetombtopreservethesoldiers'colors. D.AnewtombforEmperorQin. 4WhichstatementwouldRongBoprobablyagreewith? A.Thesoldiersshouldstayintheircurrentbrowncolor. B.Artistsshouldbeabletopaintthesoldiersinanycolortheywant. C.Archaeologistscanonlyguessatthesoldiers'originalcolors. D.Weshouldtrytorestorethearmy'svividcolors.
OnthemorningofJuly141960JaneGoodallarrivedontheeastshoreofLakeTanganyikaandtheGombeNationalPark.Thenaround5pmsomebodyreportedthattheyhadseenachimpanzee黑猩猩.StraightawayJanesetoffintotheforesttofindherchimpanzees. AsayoungwomanJaneGoodallhadnoscientificknowledgebutthisdidn'tstopherfromfollowingherchildhooddreamofstudyingchimpanzeesinAfrica.Aftermanymonthsofdifficultworkshefound:chimpanzeeseatmeattheyusetoolstogetfoodandtheyalsomaketools.EveryeveningJanewroteherfindingsinadiaryandshebegantopublisharticlesinjournals.AfterawhilescientistsstartedreadingherstudiesandJanewasofferedaplaceatauniversity.AftermoreyearsofresearchshebecameDoctorJaneGoodallin1966.TherewasafilmMissGoodallandtheWildChimpanzees1963andthenthefirstofmanybookscalledMyFriendstheWildChimpanzees1969. Duringthe1970sGombebecameadangerousplacetoworkwhereoftentherewasfightingbetweensoldiers.ManyforeignersfledtheregionbutJanestayed.AdifferentproblemdevelopedinGombeinthe1980s.Thehumanpopulationintheregionwasincreasing.AsaresultofthistherewereonlyaboutahundredchimpanzeeslivinginGombe.Janerealisedthatsomethinghadtobedonesoshesetabouthelpingthelocalcommunitytogrowmoretreesforthemintheregion. After1989Janestartedgivinglecturesfightingagainstthecrueltytochimpanzeesusedinmedicalresearchlaboratories.Shewasalsobusysettingupsanctuariesforchimpswhichhadbeencaughtorwereorphans孤儿becauseofthetradeinchimpanzeemeat.NowadaysshehasverylittlesparetimeleftbutshestillspendspartofeveryyearintheforestinGombewatchingherchimpanzees. 1InwhichorderdidJanedothefollowingthings? a.receivedherdoctor'sdegree b.madediscoveriesaboutchimpanzees c.wroteherfirstbookaboutchimpanzees d.gavelecturesaboutchimpanzeeprotection A.bacd. B.adbc. C.acdb. D.abdc. 2WhatwastheproblemthathappenedtochimpanzeesinGombeinthe1980s? A.Diseasesmadetheirpopulationdropsharply. B.ManyforeignerstookthemawayfromGombe. C.Theirhomeswerealmostdestroyedbyhumans. D.Fightingamongsoldiersbrokeoutintheirhomes. 3Whichofthefollowingbestexplainssanctuariesunderlinedinthelastparagraph? A.Modernhospitals. B.Safehouses. C.Wildlifemarkets. D.Researchlabs. 4WhydoestheauthoruseherchimpanzeesinParagraph1and4? A.TotellusJaneistheirprotectionhero. B.ToproveJane'sresearchneedsthem. C.ToexplainJanehasraisedthem. D.ToshowJanelovesthemdeeply.
ThestudyonfacialrecognitiontechnologyFRTbeganinthelate1960s.Inthelate1990sFRTbegantoenterthemarketgraduallybutitsaccuracyhadalongwaytogothoughitcostgovernmentsalotwhichmadeitunpopularatthattime.FRTattractedwideattentionafterSeptember112001andithasbeenwidelyusednow. RecognizingthepotentialabuseintheuseofFRTMicrosoftisaskingtheU.S.governmenttostudyfacialrecognitionFRandkeepadosewatchoveritsuse.PersonallyIholdthisisapositivejobthatMicrosoftisdoing.FRThasgrowntobesopowerful.Itcanbeusedtoidentifypeopleinphotosvideofeedsandofcourseinpersonwithouttheirpermission. Mr.BradfordSmithMicrosoft'spresidentsuggeststhatgovernmentsaroundtheworldshouldexaminecommercialusesofFR.TheEuropeanUnionEUisaheadofothersinthisaspectthankstoitstoughnewdataprotectionlawwhichforbidscompaniestogatherthebiometric生物特征dataneededforfacialrecognitionwithoutfirstobtaininguserspermission. SanFranciscohasbecomethefirstcityintheUSAtoforbidusingfacialrecognitionsoftware.AndOaklanddiscussedasimilarrulelastmonth.SanFranciscohassaidthatpoliceandotherpublicdepartmentscannotuseFRT.SanFranciscoalreadyusessurveillance监视camerasforreadingcarnumberplatesandpoliceofficerswearbodycameras.SanFranciscoofficialAaronPeskinsaidFRTwaslikeBigBrotherfromthebook1984byGeorgeOrwell.ThephraseBigBrotherisnowusedtodescribeattemptstoincreasesurveillanceandspyoncitizens.Mr.PeskinsaidWecanhavegoodpolicingwithoutbeingapolicestate. 1WhywasFRTunpopularinthe1990s? A.Itwasinconvenienttouse. B.Itwasexpensivetoproduce. C.Itsaccuracyneededimproving. D.Itsrolesweren'tfullyfoundout. 2Whatistheauthor'sattitudetoMicrosoft'sadviceonthemanagementofFRT? A.Hesaysyestoit. B.Heisdoubtfulofit. C.Hefeelsworriedaboutit. D.Hecan'tunderstandit. 3WhohasdonethemostworktomakepeopleuseFRTinarightway? A.SanFrancisco. B.Microsoft. C.Oakland. D.TheEU. 4Whatwouldbethebesttitleforthetext? A.BigBrotherTechnology B.DifferentUsesofFRT C.StrongProtectionofFRT D.FRData'sDisadvantages
如图在平面直角坐标系中已知点A﹣36B﹣9﹣3以原点O为位似中心相似比为把△ABO缩小则点A的对应点A′的坐标是
MyhusbandandIonlyhaveonecar.SoafterworkIalwayswalktohisofficeandwaitforhimto1mehome. OnedaywhileIwaswaitingforhimabeautifulcar2nearme.IwasbusilyadmiringthecarwhenI3thedriver.Honestlyshewasprobablythe4womanIhadeverseenoutsideofamoviescreen.Her5wereasblueasseaandshehadteethlikeanevenrowofpearls.Minuteslateramancameoutofthebuildingandwalkedovertoher.Theykissedanddroveoff. Sittingthere6injeansandaT﹣shirtIwantedtocry.Itisso7thatpeoplehaveitall. ThenextweekIsawheragainandafterthatitbecamealmost8toseeher.Iwould9ifsheandherhusbandateoutalotandwheretheywent.Iwantedherto10thecarsoIcouldseeherinfulllength.Didshe11classyhigh﹣heeledshoes? Afewweekslaterthisquestionwas12forme. Iwaswaitinginmyusualplaceandthewoman'shusbandcameovertotheircar.Heopenedthedoor.13theprettywomanwalkedaroundtothepassengerside14onawalkingstick.She15onelegwithherhandsandthentheotherone;shehadaprosthetic假肢onherleftlegandabrace支架herrightone. AstheydroveawayIbegantocry.WhenmyhusbandarrivedItoldhimwhathad16.Hesaidheknewherhusbandandthatwhentheladywas12yearsoldshehadbeen17inacarthatgotstuckontherailroadtracks.Bothherparentswerekilled.Therailcompanymadealargesettlementwithherbecausethecrossinghadno18;thatiswhysheownedsuchanicecar. ForweeksIhad19thiswomanandherwayoflife.NowIrealizehowluckyIam.Whenyoumeetapersonwhoseemstobemuchbetteroffthanyoudon'tbefooledby20. 1A.walk B.drive C.fly D.ship 2A.rangup B.spedup C.wentup D.pulledup 3A.noticed B.recognized C.greeted D.observed 4A.prettiest B.proudest C.strictest D.strongest 5A.fingers B.ears C.eyes D.nose 6A.covered B.wrapped C.put D.dressed 7A.touching B.unfair C.interesting D.surprising 8A.boring B.stressful C.routine D.amusing 9A.refer B.whisper C.wonder D.expect 10A.getoutof B.getinto C.goup D.gothrough 11A.wear B.oppose C.abuse D.ban 12A.raised B.handled C.solved D.answered 13A.Immediately B.Slowly C.Curiously D.Fortunately 14A.putting B.carrying C.turning D.leaning 15A.pressed B.skipped C.lifted D.slid 16A.disappeared B.changed C.happened D.lost 17A.limited B.trapped C.lost D.sunk 18A.announcement B.signals C.appeal D.station 19A.envied B.ignored C.respected D.understood 20A.confidence B.confusion C.ambition D.appearance
国际油价随着供需关系持续波动特别是主要产油国的日产量会影响油价的走势某段时间某石油输出大国每天石油的日产量约为1200万桶时石油的国际油价是每桶56美元每桶成本约为40美元.据统计当日产量减少50万桶时每桶国际油价将会提高7美元但当每桶价格高于100美元时石油需求量又会大幅减少从而严重影响该国的国家经济 1若某段时间该国当日的石油日产量最多1050万桶则国际石油的价格最低是多少美元桶 2该国为了实现一天的利润为3300万美元则日产量是多少万桶
NewYorkCitymuseumshavefilled2019withexcitingexhibitions.Herearehighlightsasyouschedulethatleisuretime: TheStatueofLibertyMuseum LibertyIsland StartingMay16 AbrandnewmuseumabouttheStatueofLibertyisopeningonLibertyIslandwiththreeroomswithinthespaceincludinga3Dimmersive拟真的theaterthatwillplayan8﹣to﹣10﹣minutefilmthattellsabriefhistoryofitsbeginningsanditsmeanings. 'CyclingintheCity' MuseumoftheCityofNewYork JulythroughDecember TheMuseumoftheCityofNewYorkisopeninganewexhibitaboutthehistoryofcyclingandthecity'srelationshipwithitcalledCyclingintheCity:A200﹣YearHistorythrough50objectsincluding14bicyclesphotographsandcyclingclothing.TheexhibitionwillalsofeatureancientandmodernfilmsshownonalargescreenwhichwillenablevisitorstoexperiencevirtualcyclinglandscapesviaZwiftanonlinecyclingvideogame. 'ShePersists:ACenturyofWomenArtistsinNewYorkCity' GracieMansion StartingJuly14 With60worksbymorethan40artistsGracieMansioniscelebratingtheexcellentworksofwomenwhocalledNewYorkhomeinthisnewexhibit.Thepaintingsfilmphotographycraftanddesignaredividedintothreethemes:bodyasabattlegroundpicturingpeopleandexpandingabstraction. MuseumoftheDog 101ParkAve. StartingOct.6 Anentireartmuseumaboutdogshasarrivedin Manhattanwithalargetwo﹣floorcollectionofpaintingssculpturesandrarepiecesfromfamousdogartists.ThereareinteractiveexhibitslikeaFindYourMatchandaMeettheBreedstouchscreenwhereyoucanexploredifferentbreeds'featurestraitsandhistories. 1Atwhichplacecanpeoplelearnthehistoryofcycling? A.LibertyIsland B.MuseumoftheCityofNewYork C.GracieMansion D.101ParkAve. 2WhichofthefollowingisNOTopenduringthesummercamp? A.TheStatueofLibertyMuseum B.'CyclingintheCity' C.'ShePersists:ACenturyofWomenArtistsinNewYorkCity' D.MuseumoftheDog 3Whichofthefollowingisatraditionalexhibitionwithoutusingdigitaltechnology? A.TheStatueofLibertyMuseum B.'CyclingintheCity' C.'ShePersists:ACenturyofWomenArtistsinNewYorkCity' D.MuseumoftheDog
Imagineyouareopeningyourowncompanyandwanttohireamanager.Youhavetwoapplicantsandtheyarebothskilledandexperiencedsowhowouldyouratherhire:JuliaWatsonorShobhaBhattacharya?ChancesarcthatyouwouldpreferWalsonright?Butwhy? EasynamesareregardedasmorefamiliarlessriskyandlessdangerousErynNewmanascientistatVictoriaUniversityofWellingtonNewZealandtoldScientificAmerican.Asaresultpeoplewitheasiernamesareoftenconsideredtobemoretrustworthy. ThisiswhatNewmanandherteammateshavefoundintheirrecentstudy.Intheexperimenttheypicked218differentforeignnamesincludingdifficult﹣to﹣pronounceoneslikeYevgeniDherzhinskyandeasynameslikeBodoWallmeyer.Theythenattachedeachnamewithastatementsuchasturtlesaredeafandgiraffesaretheonlymammalsthatcannotjumpandaskedvolunteerswhethertheythoughtthestatementsweretrue.Theresultsshowedthatstatementsconnectedtoeasiernamesweremoreoftenrankedasbelievablethanthosebelongingtodifficultnamesregardlessofwhatthetruthreallywas. Infactpreviousstudieshavealreadyfoundthatourjudgmentsaboutproductscanbeaffectedbytheirnames.Forexamplewetendtothinkofafoodadditivewithaneasiernameassaferandastock股票withaneasiernameasmoreprofitable赢利的accordingtoMedicalDaily.Butresearcherspointedoutthatthiseffectcanchangedependingonwheresomeonecomesfrom.ForexampleanativeBritishmanmayfindYevgeniDherzhinskyhardtopronouncewhileRussianpeoplecansayitwithouteffort. Newmanhopesthatthisfindingcanmakeusbetterseeourbias.It'snotjustunfairtopeoplethatwemakejudgmentsbasedonfeelingsratherthanfacts﹣itcansometimeshaveseriousresults.Forexamplewemaychoosetobelievecertaineyewitnessesincourtsimplybecausetheirnamessoundmoretrustworthyeveniftheyareactuallylying.Orwemayletgoofqualifiedjobapplicantsduetotheirdifficultnames. NowifyoucouldmakethatdecisionagainwouldyoustillpreferJuliaWatsontoShobhaBhattacharya? 1WhydoestheauthorrefertothechoicebetweenthetwonamesinParagraph1? A.Tointroducehowtochooseagoodapplicant. B.Toshoweasynamesareconsideredmorerisky. C.Toexplainwhatkindsofapplicantsareconsideredreliable. D.Tomakereaderswonderwhyapplicantswitheasynamesarepreferred. 2WhatdidNewmanandherteammatesdiscoverintheirexperiment? A.Hard﹣to﹣pronouncenamesdidn'tinfluencehowthevolunteersjudged. B.Statementspairedwitheasynameswereratedasreliableinmanycases. C.Volunteerswitheasiernamesweremorelikelytochoosetruestatements. D.Statementsconnectedwithdifficultnamesweremoretrustedbyvolunteers. 3TheunderlinedwordbiasinParagraph5probablymeans A.realfact B.wisejudgment C.goodunderstanding D.unreasonablepreference 4Whatcanbeconcludedfromthepassage? A.Weshouldthinktwicebeforewemakeadecision. B.Russianshavemorefairnesstopeople'snamesthantheBritish. C.Judgingpeoplebasedontheirnamesmaycauseseriousproblems. D.Theharderyournameispronouncedthemorelikelyyouwillgetajob.
下列运算正确的是
Manyscientistsbelieveourloveofsugarmayactuallybeanaddiction瘾.Whenweeatordrinksugaryfoodsthesugarentersourbloodandaffectspartsofourbrainwhichmakesusfeelgood.Thenthegoodfeelinggoesawayleavinguswantingmore.1Inthiswayitisinfactanaddictivedrugonethatdoctorssuggestweallcutdownon. ItseemslikeeverytimeIstudyanillnessandsearchforthefirstcauseIfindmywaybacktosugarsaysscientistRichardJohnson2Why?SugarwebelieveisoneofcausesoftheproblemifnotthemajorreasonsaysJohnson. Ourbodiesaredesignedtosurviveonverylittlesugar.Earlyhumansoftenhadverylittlefoodsoourbodieslearnedtobeveryefficientinstoringsugarasfat.Inthiswaywehadenergystoredforwhentherewasnofood.Buttodaymostpeoplehavemorethanenough.3Wellwhatisthesolution?It'sobviousthatweneedtoeatlesssugar.4Frombreakfastcereals谷物toafter﹣dinnerdessertsourfoodsareincreasinglyfilledwithit. 5Manyschoolsarereplacingsugarydessertswithhealthierfoodlikefruit.Otherschoolsarcgrowingtheirownfoodingardensorbuildingfacilities设施likewalkingtrackssostudentsandothersinthecommunitycanexercise. A.Buttherearethosewhoarefightingbackagainstsugar. B.High﹣sugarfoodscannegativelyaffectyourenergylevels. C.Sotheverythingthatoncesavedusmaynowbekillingus. D.Alltastyfoodsdothisbutsugarhasaparticularlystrongeffect. E.Thetroubleisintoday'sworldit'sextremelydifficulttoavoid. F.Theaveragepersontakesinabout24kilogramsofsugareachyear. G.1/3ofadultsworldwidehavehighbloodpressureand2.5billionsufferfromobesity.
如图1在▱ABCD中BE⊥BC交AD于E且BE=BCCF平分∠BCD交AB于F交BE于G连接EF. 1若∠A=60°CG=4求EF的长 2如图2若BM平分∠ABE交GF于点M且EF=GB求证AE+FM=CD.
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. Ourschoolhasalonghistory.Itissuchbeautiful.ButrecentlyIoftenfindsomestudentsdosomethingbadtoourschool.ForanexamplelastFridayIsawastudentspittinginthecorneroftheschoollibrary.Itellhimnottodothatbuthedidn'trespondtomeandwentstraightawaywhatmademesad.There'snodoubtthatitisourdutykeepourschoolcleanandtidy.Weshouldn'tleaverubbisheshereandthere.Drawpicturesinthewalliscertainlyabadhabit.IfeveryoneofuscontributemoretoourschoolImsureshewillbecomemoreandmorebeautifully.
OnthenightofAugust242001everythingchangedwhenmyfriendscarhitawallwithmeinside.IlostmostofmyrightlegandIwasleftbleedingwithseveralbrokenbones.Atthehospitalalthoughmybodywasweakmymindwasstillveryclear.Ijustkepttellingmyselftoholdon.AweeklaterImadeadealwiththedoctorsthatonceIcouldrollontomysideIcouldleave. TwoweekslaterIwasallowedtogohome.AlthoughIleftthehospitalthefightwasfarfromover.Myleftkneewasbadlyinjuredwhichresultedindifferentsurgeries手术overthenextfewyears.AndsoonmoreofmyrightleghadtoberemovedThismadeithardertowearmyfalselegsoIdonatedittoanursewhocouldn'taffordoneforherself.ThejoyofbeingabletoprovidethisgifttosomeoneelsewasgreaterthanthehappinessIfeltonanydayIwasabletowearitmyself. Peopleoftentellmethey'reproudofmeforstayingstrong.Butinmymindstayingstronghasalwaysbeenmyonlychoice.SoonthedayIleftthehospitalImadeapromisetomyselftoalwayslivelifetothefullest. NowImaynotbeabletodothingsthewayeverybodyelsedoesthembutstillIalwaysfindawaytodothem.IsoonsettledintoeverydaylifeagainuntilonedayIrealizedIwasn'tlivingmylifeasfullyasIwantedto. After13yearsofthinkingthatIwasconfidentIhadanunfamiliarfeelingsweepoverme.ForthefirsttimeinmylifeIwasnotonlyconfidentbutIwantedtohelpthosearoundme.In2014Ievenstartedmodeling.MydreamisthatonedayalittlegirlwillseemeinamagazineandsayWowshe'sbeautifulandsheonlyhasoneleg.IcoulddothattoosomedayeventhoughIhaveadisability. 1Howdidtheauthorfeelafterthecaraccident? A.Shefeltluckythatshewasstillalive. B.Shetookapositiveattitudetowardlife. C.Shecouldn'tacceptthelossofherleg. D.Shecomplainedthatlifewasunfairtoher. 2Whatmadetheauthorfeelhappyaccordingtothetext? A.Shecouldwearherfalselegagain. B.Shehadlivedherlifetothefullest. C.Shewasabletoofferhelptoothers. D.Shecoulddothingslikeeverybodyelse. 3Whydidtheauthorstartmodelingin2014? A.Toappearonthecoverofamagazine. B.Toprovedisabledpeoplecouldalsosucceed. C.Tochallengeherselfbytryingsomethingnew. D.Toencourageotherstobeconfidentofthemselves. 4Whatwastheauthor'smainpurposeinwritingthetext? A.Tostresstheimportanceofhavingadream B.Toshowhowdifficultlifeisfordisabledpeople. C.Togiveadvicetodisabledpeopleonhowtomakealiving. D.Toshareherpastexperiencesandhowshediscoveredherdream.
为庆祝新中国成立七十周年你们学校即将举办一次大型文艺汇演GrandArtandCulturalShow.假如你是李华请给你们学校留学生Eric写一封邮件邀请他参加观看. 内容包括: 1.汇演时间和地点; 2.汇演内容和意义. 注意: 1.词数:100左右. 2.可以适当增加细节以使行文连贯.
Theinternetisn'talwaysahappyplace.Buttherearegroupstryingtochangethat.KuakuaqunorpraisinggrouponWechatinwhichpeoplesendoutcomplimentsandpositivemessagesarebecomingpopularamonguniversitystudentsinChina. PraisinggroupshavebeenfoundedbystudentsfromseveraluniversitiessuchasFudanUniversityCommunicationUniversityofChinaHuazhongUniversityofScienceandTechnology.PeoplecanevenbuymembershipsofsuchgroupsononlineplatformslikeTaobao.Onceadmittedtheymakecomplimentarycommentsabouteachotherandevenasktobecomplimentedonparticularthings. ThepraisinggroupscomeatatimewhenthementalhealthofyoungChineseisgettingattention.AsyoungChineseseekcompanyandconfidencethepraisinggroupsmeetalotofpsychologicalneeds.ThegroupallowsmetoseethegoodqualitiesinmyselfthatIoftenoverlookandlookatthebrightsideofeverything.KindnessfromstrangerscanhelpmefeelmuchbetterTianJiayin22toldChinaDaily. ThepopularityofchatgroupsisalsoareflectionofChineseculturereportedGlobalTimes.AsmanyyoungChineseareraisedtobemodestit'suncommonforthemtoopenlyseekandgivepraise.Asaresulttheydesirecomplimentsastheygrowup.Ifthekidsgotmorepraisefromparentsandteacherstheirdesireforpraisewouldn'tbesostrongsaidDaiJiapsychologistfromHunanUniversityofCommerce. ButChenKanapsychologistfromFudanUniversitywarnedthatmembersofpraisinggroupsshouldbecautiousaboutgivingorreceivingpraise.Thebiggestriskistheconstantemphasisonthe‘falseself'whichmakesithardertoseethe‘trueself'shesaid. 1WhatdoestheunderlinedwordcomplimentsinParagraph1mean? A.praises B.questions C.advice D.information 2WhydomanyChineseuniversitystudentslikeKuakuaqun? A.ItgivesthemadiscountonTaobao. B.Ithelpsthemwiththeirstudies. C.Itmakesthemfeelconfident. D.Ithelpsthemmakenewfriends. 3WhatdoesChenKanthinkofgivingorreceivingpraise? A.Receivingpraiseismorehelpfulthanbeingmodest. B.Parentsandteachersshouldgiveyoungpeoplemorepraise. C.kidsshouldbeencouragedtoopenlyseekandgivepraise. D.Toomuchpraisemightstopkidsfromseeingtheirtrueselves. 4Whatisthemainideaofthearticle? A.Tipsforgettingmotivated B.ThelostgenerationinChina C.OriginofthepraisingcultureinChina D.AdvantagesanddisadvantagesofKuakuaqun
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