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食盐是一种重要的化工原料.请回答下列问题. (1)请完善实验室除去粗盐中泥沙等难溶性杂质的实验步骤. ①操作Ⅰ的名称 ②在过滤操作中,用到的玻璃仪器有:烧杯,玻璃棒和 . 如果实...
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乙烯是一种重要的化工原料以乙烯为原料衍生出部分化工产品的反应如下部分反应条件已略去请回答下列问题1A
乙醇是一种重要的化工原料由乙醇为原料衍生出的部分化工产品如下图所示回答下列问题1A的结构简式为___
乙烯是一种重要的化工原料以乙烯为原料衍生出部分化工产品的反应如下部分反应条件已略去请回答下列问题1A
乙醇是一种重要的化工原料由乙醇为原料衍生出的部分化工产品如下图所示回答下列问题1A的结构简式为___
食盐是一种重要的化工原料可以调味还可用于农业生产选种要配制100g溶质质量分数为16.5%的NaCl
乙醇是一种重要的化工原料由乙醇为原料衍生出的部分化工产品如下图所示回答下列问题1F.的官能团的结构简
乙烯是一种重要的基本化工原料乙烯的产量可以用来衡量一个国家的石油化工发展水平请回答关于乙烯的下列问题
2001年1月我国甲公司以CIF价格条件从美国乙公司进口一批化工原料该批化工原料在运输途中国船舶内淡
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金刚烷是一种重要的化工原料工业上可通过下列途径制备请回答下列问题1环戊二烯分子中最多有_______
乙烯是一种重要的化工原料以乙烯为原料衍生出部分化工产品的反应如下部分反应条件已略去请回答下列问题1A
乙醇是一种重要的化工原料由乙醇为原料衍生出的部分化工产品如下图所示回答下列问题1A.的结构简式为2B
碳酸钠是一种重要的化工原料它的俗名是
烧碱
纯碱
石碱
食盐
乙醇是一种重要的化工原料由乙醇为原料衍生出的部分化工产品如下图所示回答下列问题1A的结构简式为___
食盐是一种重要的化工原料可用于生产①金属钠②氯气③盐酸④硫酸⑤烧碱⑥碳酸钠等以上正确的是
①④⑤⑥
③④⑤
①②③⑤⑥
全部
2001年1月我国甲公司以CIF价格条件从美国乙公司进口一批化工原料该批化工原料在运输途中因
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乙醇是一种重要的化工原料由乙醇为原料衍生出的部分化工产品如下图所示回答下列问题1A的结构简式为___
乙醇是一种重要的化工原料由乙醇为原料衍生出的部分化工产品如下图所示回答下列问题1A的结构简式为___
氯化钠是一种重要的化工原料工业上电解食盐水不可能得到的物质是
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硫酸钠
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氯气
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假定你是李华校学生会论感你校拟向一所在美国的姐妹学校图书馆捐赠一批中国经典文学图书以供该校学生阅读.请你给该校负责人写一封邮件内容如下: 1.自我介绍: 2.介绍这批书籍 注意: 1.词数100左右: 2.可适当增加细节以使行文连贯; 3.信的开头和结尾已给出不计入总词数. DearSir/Madam Yoursfaithfully LiHua
Beingyoungisassociatedwithallthegoodthingsinlife﹣beautyhopeandenergy.Butyouthalsohasnegativeassociations﹣impulsivenesstrouble﹣makingandirresponsibility.Thisnegativesideseemstobewhatsocietyfocusesonmorewhichiswhyyoungpeoplehavemostlybeenconsideredasidleanddifficult. ButwhenitcomestoGenerationZ﹣thosebornbetween1996and2010﹣thisstereotypedoesn'tseemtoapplyanymore. InJapanforexampleGenZ﹣ersarelesslikelytobuyonimpulsebuttakeintoconsiderationmoreaproduct'struevalue.They'relookingatthecompaniesnotjusttheproductsMasahikoUotaniCEOofJapanesecosmeticscompanyShiseidotoldBloomberg.They'reasking'AretheyreallydeliveringvaluetothesocietyAretheypromotingdiversityandinclusion GenZ﹣ersarealsomoregroundedthanwe'veexpectedthemtobe.AccordingtoarecentsurveybyBankofAmericamorethanhalfofyoungadultsagedbetween18and23saidtheywereplanningtobuyahousewithinfiveyears.Andthey'renotjustsayingit﹣theyarewillingtomakesacrificesforitincludinggettingasecondjobandsavingmoneyfordownpaymentinsteadofspendingitonavacation. DespitetheiryoungagethisgroupispragmaticandactivelyplanningfortheirfutureD.SteveBolandheadofConsumerLendingatBankofAmericatoldUSAToday.Theyhaveaclearvisionhowtheyarewillingtohelpthemselvesinordertomakeithappen. SocialissuesarealsoatthecenterofconcernofGenZ﹣erswhotakethemselvesasachangingforceoftheworld.InIndiaforexampleyoungpeoplewhohavejustreachedthevotingageareeagertovoteforanewleaderwhoiscapableofsolvingproblemsthatmatterthemosttothemincludingpollutionunemploymentandwomen'ssafety. AsaGen﹣Zeryourselfwhatisyourplanforthefuture 1Whatdotheunderlinedwordsthisstereotypeinparagraph2referto A.Beingyoungisgood. B.GenZ﹣ersarebornafter1996. C.Thetraditionalpoorimpressionsontheyouth. D.Theassociationswithyoungpeople. 2Wecaninferfromthethirdparagraphthat. A.GenZ﹣ersinJapanarepicky B.TheGenZ﹣ersareself﹣centered C.TheGenZ﹣erscarelittleaboutproducts D.TheGenZ﹣ersarewisewhenshopping 3What'sSteveBoland'sattitudetotheGenZ﹣ers A.Approving. B.Negative. C.Indifferent. D.Critical 4WhichofthefollowingwordsmaybestdescribetheGenZ﹣era A.Confidentandindependent. B.Visionaryandresponsible. C.Persistentanddown﹣to﹣earth. D.Activeandcreative.
圆锥的母线长为8cm底面半径为6cm则圆锥的侧面积是
如图是三个反比例函数y=y=y=在x轴上方的图象由此观察k1k2k3的大小关系为
TheEnvironmentalFilmFestivalhasbecomeoneoftheworld'sgrandestsupportersoftheenvironmentalfilm.Toofferfreshviewsonglobalenvironmentalissuesthisyear'sfestivalwillincludearecordof190filmsfrom50countries.including110premieres首映.Herearejustafewofthehighlights. 1.HotWater Featuredamongthefestival'sopeningnightfilmsisthehighlyexpectedHotWateralook2thedepressingdestructiveeffectsofuranium铀miningintheAmericanWest.FormerUS.RepDenisKucinich.whoranforpresidentin2004and2008isfeaturedinthefilmalongwithfilmmakersElizabethKucinichandLizabethRogersDirectedbyKevinFlintand 2.TotheWonder TotheWonderisthelatestfilmbywill﹣knownAmericanDirectorTrrenceMalick.ThefilmanexplorationoflovesetagainstthepowerofnaturestarsBenAleckOlgaKurylenko.RachelMcAdamsandJavierBardemThefilmpremieredincompetitionatthe2012VeniceFilmFestivalandismakingisWashingtonD.Cpremiereduringthefestival. 3.Revolution ThisWashingtonD.C.premierepresentstheCanadianfilmmakerandenvironmentalactivistRobStewart'snewworkRevolutionanurgingcrytotoday'syouthtochangetheplanetbeforeit'stoolate.Theaward﹣winningdocumentarytakesStewartthrough15countriesoverfouryearsinanefforttofindthesecrettosavetheecosystemswerelyonforsurvival. 4.TheFifthSeason BeautifulandmysteryJessicaWoodworth'slatestfeatureTheFifthSeasonisapoeticmeditationEAonnatureinbattleagainsthumans.ThedramaticnarrativetakesplaceinBelgium'ssecretArdenneswherethelocalsrelyonthelandbutnaturetakesaturnandseemstogoonmysteriousstrikeInFrenchandFlemishwithEnglishsubtitles.DirectedandproducedbyWoodworthandPeterBrosens. 1Revolutionisintendedto. A.helpRobStewarttobeanactivist B.changetheyounggeneration C.appealtotheyoungtosavetheearth D.takeStewartthrough15countries 2Whichfilmwillyougotoifyouareapoemlover A.HotWater B.TotheWonder. C.Revolution. D.TheFifthSeason. 3Whatdoweknowaboutthefourfilms A.Theytellsomethingnewaboutenvironmentproblems B.EnvironmentalFilmhasbecomethegrandestfilm C.Theyareallabouthumans'negativefretsontheecosystem D.Theywillbefirstlyshownonthisyear'sfestival
△ABC中∠C=90°BC=12AB=13那么sinA的值等于
WhydoestimeseemtoflybyfasteraswegetoldYou'vegotyouragingbraintoblame. Thisislikelyduelargelytothephysicalchangesofournervesandneurons神经元.Newresearchsuggests‘rapidfire'abilitiesoftheyoungbrainallowustoprocessmoreinformationduringyouthcausingthedaystoseemlongerearlierinlife.Howeveraswegetoldresearcherssaytheolderbraintakesmoretimetoprocessinformation ThenewfindingputforwardbyaDukeUniversityresearcherwaspublishedinapaperinthejournalEuropeanReviewthisweekAccordingtoAdrianBejantheJ.AJonesProfessorofMechanicalEngineeringatDukethephysicalchangesofournervesandneuronsplayamajorroleinourperception知觉oftimeaswegetold.Overtheyearsthesestructuresbecomemorecomplexandeventuallybegintodegrade. Littlebabiesforexamplemovetheireyesmuchmoreoftenthanadultsbecausethey'reprocessingimagesatafasterrateBeiansaysForolderpeoplethismeansfewerimagesarebeingprocessedinthesameamountoftimecausingexperiencestoseemasthoughthey'rehappeningmorequickly. 1Whatcausestimetoflyfasteraswegetold A.Changesofournervesandneurons. B.Informationinourbrain. C.Theelectricalsignals. D.Rapidfire'abilities. 2Whatisunavoidableintheprocessofgettingold A.Longerdays. B.Agingbrains. C.Moreimages. D.Lessexperience. 3Whydothedaysseemlongerearlierinlife A.Youngpeoplearemoreenergeticintheirlife. B.Theyoungerbraintakeslesstimetoprocessinformation C.Oldpeoplehavefewerthingstodothanyoungpeople. D.Littlebabiesmovetheireyesmuchmoreoften. 4Whatisthebesttitleofthetext A.NervesandNeurons B.TimeFliesFast C.TheOldertheFaster D.TheFunctionoftheBrain
右边几何体的俯视图是
在平行四边形ABCD中∠C和∠D的平分线交于MDM的延长线交AD于E试猜想 1CM与DE的位置关系 2M在DE的什么位置上并证明你的猜想.
LaborDayWeekendatParamountPicturesStudios ThisLaborDayweekendjointheLosAngelesTimesfor3eveningsofamazingfoodwineandchefexperiences.Dozensofhand﹣pickedlocalrestaurantseacheveningwillshowcaseourcity'srichanddiversecookingscenebyservingyoutheirbest.TasteandcelebrateSouthernCalifornia'smostinvitingfoodanddrink.Yourticketisall﹣inclusiveandisgoodforunlimitedfoodbeerwine&spiritstastingsplusallstageactivities. PLEASENOTE:ALLEVENTSATTHETASTEARE21YEARSANDOLDERONLYANDALLSALESAREFINAL. AVIPAccesslevelticketgetsyou: •ConvenientandfreeparkinginsidetheParamountPicturesgatessavingsof﹩15 •Accesstofurnishedloungeduringtheentireevent •BehindthescenestourofParamountPicturesStudios •Firstinthedooraccesstothemainevent Duetothenatureofthiseventwearenotabletoofferrefunds. SCHEDULE FridayAugust31:7:30p.m.﹣10:30p.m. SaturdaySeptember1:8:00p.m.﹣10:30p.m. SundaySeptember2:8:00p.m.﹣10:30p.m. MakesuretoalsosavethedateforournewCostaMesaweekendofLosAngelesTimesTheTasteonOctober19to21.Detailshere. 1OnwhichdaydoestheLaborDayeventlastlongest A.August31. B.September1. C.September2. D.October21. 2WhatcanyoudoontheLaborDayweekend A.Experiencehands﹣oncooking. B.Enjoyafamilytourwithchildren. C.Watchperformancesinthedaytime. D.Havemealsinlocalrestaurantsforfree. 3WhatprivilegedoesVIPmembershave A.Parkingacaratadiscount. B.Livinginafurnishedroom. C.Gettingtheirmoneybackastheylike. D.HavingthechancetolearnmoreabouttheStudios.
如图1一个圆球放置在V型架中.图2是它的平面示意图CACB都是⊙O的切线切点分别是AB如果⊙O的半径为cm且AB=6cm求∠ACB.
AmovieaboutMountQomolangmaIsawonaflightinspiredmetoclimbmountains.WhenIsawtheclimbersgot1inastormthereIimmediatelyknewIhadtostartclimbing.Itwasnotthe2mostpeoplehadtothatfilmbecausenoneofthemsurvived. I3toclimballthehighestpeaksinEuropein2017.GrowingupinSwedenIwasalways4tobeoutdoorsbymyfatherbutIwasn'ta5adventurer﹣Ijustwantedtobea6forgirlsandtotellastorythathadneverbeentold. Thereisno7definition定义ofamountain.InHollandBelgiumandDenmarkthehighestpeakisreallyjustasmallhill.Youcouldparkyourcaronthetop.Itfeltabitlike8butIdecidedIwouldclimbthem9. Climbingmountainsisanexperiencethatisbeyond10Youareinabeautifulenvironmentandwhenyoureachthetopyoufeel11.Buralsoyouhavetoclimbdownwhichiswhenmostaccidentshappen.12Idon'tclimbmountainsthatIamnottotally13. Iwantedto14theprojectathomeonSweden'sKebnekaise2097m.Iclimbeditwithmycameraassistant.Iwaswearingasuperherosuit.OnceIwasatthetopwedida15﹣itwaslikeadayonthejob;itdidn'tseemas16asI'dhoped.ButwhenIputitonlineandpeoplestarted17meIfelt18.Thankstoclimbingit'smademesomuch19physicallyandmentally. My20nowisalwaystohaveamountaininmycalendar.IwillclimbMountQomolangmaonedaywhenI'mready. 1A.stuck B.excited C.changed D.annoyed 2A.access B.promise C.solution D.reaction 3A.declined B.happened C.decided D.agreed 4A.troubled B.warned C.forced D.encouraged 5A.lucky B.serious C.calm D.friendly 6A.rolemodel B.nicesurprise C.funnyjoke D.childhoodmemory 7A.vague B.universal C.broad D.alternative 8A.challenging B.frightening C.attracting D.cheating 9A.otherwise B.indeed C.again D.regardless 10A.recognition B.reach C.description D.control 11A.awkward B.unbelievable C.scared D.anxious 12A.Instead B.However C.Thus D.Lastly 13A.afraidof B.curiousabout C.addictedto D.readyfor 14A.topoff B.lookinto C.giveup D.workout 15A.puzzle B.shoot C.course D.wash 16A.strange B.normal C.special D.ridiculous 17A.praising B.questioning C.defending D.teasing 18A.proud B.grateful C.confused D.astonished 19A.smarter B.stronger C.shyer D.kinder 20A.problem B.secret C.goal D.regret
二次函数y=x2+bx+c的图象如图所示则x2+bx+c=0的两根分别是.
据报载有关数据计算精确度越来越高飞船发射偏差仅为0.0000104这个数用科学记数法应表示为.
30分IwasoftentoldthatGodlovedme.Iwantedtobelievethatsomuch. Fornearlya1Iwasshuttledbetweenadoptivefamiliesandgrouphomes﹣14ofthem.Somefamilieswerenice.Otherswere2likeevilsinadarkfairytale.Attheageof12Iwasfinally3byGayandPhilCourteracouplewithtwoadultsons.GaysaidWelivedfora4andwebelievethatreasonisyou. I'dbeenliedtobyadultssomanytimesinthepastyears.Iwasn'tsurethey5lovedme.Therewillbeno6.AllthoseparentswereprettymuchthesameIsaidtomyself.I7tocallthemMomandDad.Iwasparticularaboutthehome﹣cookedmealsGay8prepared.Ihidinmyroomasmuchaspossible.Iwantedtomakethem9sothey'dshowtheirtruecolors. OneFridaynightintheeighthgradeIreally10thingstothelimit.Aneighborhoodgirlhadpersuadedmeto11outofthehousewithhertomeetsomeboys.IputAdvil镇痛药inmyparents'drinksafterdinner12itwouldmakethemsleepy.Wow!I'dneverseenthemso13.NowtheywouldsurelysendmebackIthought.Insteadtheysaid.Ashleywearefamilywehavenowheretosendyoubacktowemust14thislikeafamily. Iranin15tomybedroomwhereIspenttheweekend.SeeinghowmuchI'ddisappointedthemmademe16.Noonehadevercaredformelikethat.Ididn'tdeservethis17. SundaynightGaycameintomyroom.She18downandkissedmycheek.Loveyousweetieshesaid.ForthefirsttimeeverIkissedherback.LoveyoutooIsaid.Thatword﹣love﹣soundedso19yetfeltsotrue.Iwasdiscoveringthatloveiswhatmakesan20. 1A.fortnight B.week C.month D.decade 2A.cruel B.mad C.angry D.strange 3A.moved B.discovered C.adopted D.persuaded 4A.family B.kindness C.love D.reason 5A.possibly B.finally C.truly D.certainly 6A.point B.choice C.difference D.evidence 7A.started B.refused C.wanted D.agreed 8A.happily B.painstakingly C.willingly D.easily 9A.mad B.relaxed C.content D.shocked 10A.dragged B.proved C.pulled D.pushed 11A.run B.jump C.slide D.break 12A.discovering B.observing C.seeing D.thinking 13A.nice B.angry C.different D.cruel 14A.dealwith B.putdown C.lookthrough D.writedown 15A.joy B.tears C.anger D.laughters 16A.ashamed B.annoyed C.excited D.satisfied 17A.service B.honor C.honesty D.kindness 18A.bent B.took C.put D.broke 19A.different B.popular C.strange D.familiar 20A.group B.family C.adult D.union
Whenyoufallgetupagainisalessoneveryparenthopestheirchildwilllearn.ButnoonecouldhaveshowedthisbeerthanBaileyMatthewsfromNottinghamshireEngland.Despitehavingcerebralpalsyaconditionthatlimitsbodymovementandmuscledevelopmentthe8﹣year﹣oldcrossedthefinishlineatatriathlon铁人三项赛withouthiswalkerlastSaturday. Diagnosed诊断withcerebralpalsyat18monthsBaileybecameinterestedintakingonatriathlonwhenhisdadJonathanMatthewsstartedpushinghimarounda5﹣kmcourseataweeklyparkrunevent.JonathanthenadaptedawalkingframesoBaileywhoneedsregularphysicaltreatmenttohelpwithhismobilitycouldgetroundthecoursehimself.SoonafterBaileyexpressedhiswishtotakeonatriathlonandbegantrainingonaspecialbikeandswimminginalake. Althoughhetrippedandfellafewtimesheimmediatelypickedhimselfbackupandmadeittotheendwithhisfatherrollingthewalkerbehindhim.Themostinspiringmomentcameafterhehadalreadycompleteda100﹣meterswima4000﹣meterbikerideanda130﹣meterrun.Hediscardedhisspecially﹣adaptedwalkingframetofinishthelast20metersoftheraceunaidedbringingthecrowdtotears.HundredsofaudiencecheeredBaileyouttothefinishlinebuthisbiggestfansweremostdefinitelyhisparents. Hehasalwaysstruggledwiththingsthatparentsofotherchildrentakeforgrantedbutheneverletsitbotherhim.Hedoesn'tseehimselfasdifferenttoanyoneelse.Ifhewantstodosomethinghewillfindawaytodoitevenifitisnottheconventionalway.WehavealwaystriedtomakesurethatifthereissomethinghewantstodothereisnosuchwordasCAN'TsayshismotherJulieHardcastle. 1WhatdoweknowaboutBaileyMatthews A.HewasthebeststudentinNottinghamshire B.Hefullyrecoveredafterhetookpartinatriathlon. C.Hewasencouragedbyhisdoctortobecomeatriathlon. D.Hefinishedatriathlonregardlessofphysicalrestrictions. 2WhichofthefollowingbestexplainsdiscardedunderlinedinParagraph3 A.Reliedon B.Threwaway C.Toredown D.Fixedup 3HowdoesJulieHardcastlefeelaboutherson A.Sheisproud B.Sheisgrateful C.Sheissympathetic D.Sheisdisappointed. 4Whatcanbeasuitabletitleforthetext A.Parents'Love B.StrongFamilyTies C.AnInspiringTriathlonFinish D.ALonelyStruggleAgainstMisfortune
HowtoCultivateConfidence Whenfacedwithabigchallengewherepotentialfailureseemstoappearateverycornermaybeyou'llhearthisadvice:Bemoreconfident.1Takethebeliefthatyouarevaluableworthwhileandcapablealsoknownasself﹣esteem.Confidenceturnsthoughtsintoaction.Itcomesfromthegenesyouarebornwiththewaypeoplegetusedtotreatingyouaswellasthechoicesyoumake.Whileitisn'tpossibletocompletelyseparatethesethreefactorsthepersonalchoiceswemakeobviouslyplayamajorroleinconfidencedevelopment.Asaresultbykeepinginmindcertainpracticaltipswedoactuallyhavethepowertocultivateourownconfidence. 2Ifyou'relookingforalong﹣termchangeconsiderthewayyouthinkaboutyourabilitiesandtalents.DoyouthinktheyarefixedatbirthorthattheycanbedevelopedThesebeliefsmaterbecausetheycaninfluencehowyouactinthefaceofsetbacks.ifyouhaveafixedmindsetmeaningthatyourtalentsarelockedinpaceyoumightgiveupassumingyou'vediscoveredsomethingyou'renotgoodat.Butifyouhaveagrowthmindsetandthinkyourabilitiescanimproveachallengewillbecomeanopportunitytolearnandgrow.Neuroscience神经学supportstheJatter.Theconnectionsiryourbraindogetstrongerandgrowwithstudyandpractice.3 Practicingfailureisamust.Failurehappens.4.J.K.RowlingwasrejectedbytwelvedifferentpublishersbeforeonepickedupHarryPotter.TheWrightBrothersbuiltonhistory'sfailedattemptsatflightbeforedesigningasuccessfulairplane.Studiesshowthatthosewhofailregularlyandkeeptryinganywayarebetterequippedtorespondtochallengesinaconstructiveway.5Sothinkofachallengeyouwanttotakeonrealizeit'snotgoingtobeeasyacceptthatyou'llmakemistakesandbekindtoyourselfwhenyoudo.You'llfeeltheexcitementknowingthatwhatevertheresultyou'llhavegainedgreaterknowledgeandunderstanding. A.Butwhatisconfidence B.Socanconfidencebeeasilycultivated C.Everyoneispossibletoencounterfailure. D.Beingatalentedpersonisquitenecessary. E.Theylearntotrydifferentstrategiesandpersevere F.Believinginyourabilitiestoimproveisthefirststep. G.Italsoturnsoutthatpeoplewithagrowthmindsetarebetteratdealingwithchallenges
GardenerssuchasPrinceCharleswhoclaimthattalkingtoplantsencouragesthemtogrowhavelongbeenseenasalittlesilly.ButscientistshavediscoveredevidencewhichsuggeststheRoyalmayactuallyberightandtheycouldbelisteningtohim.BiologistsatTelAvivUniversityinIsraelhavefoundthatflowerscanactasaplant'searstohelpthemdetectthesoundofapproachinginsects. Whentheresearchersplayedrecordingsofflyingbeestoeveningprimroseflowerswithinthreeminutesthesugarconcentrationsinthenectar花蜜ofitsflowersincreased.Thefluidproducedtoattractpollinating授粉insectswasonaverage20percenthigherinflowersexposedtothebuzzcomparedtothoseleftinsilenceorexposedtohigherpitchedsounds.ProfessorLilachHadanywholedthestudysaid:Ourresultsdocumentforthefirsttimethatplantscanrapidlyrespondtopollinatorsoundsinanecologicallyrelevantway. HoweverProfHadanysaidaplant'sabilitytorespondtopollinatorsmaybeweakenedincityenvironmentsorbesideabusyroad.Whileplantsrequirewatersunlightandtherighttemperaturetogrowitiswidelybelievedtheydonothavesensesinthewayanimalsdo. Butthestudypublishedontheopen﹣sciencewebsiteBioRxivsuggeststheeffortsofgardenerswhotalktotheirplantsmaynotbeinvain.Plants'abilitytohearhasimplicationswellbeyondpollination﹣plantscouldpotentiallyhearandrespondtoherbivoresotheranimalstheelementsandpossiblyotherplantsProfHadanyadded. Amonth﹣longexperimentconductedbytheRoyalHorticulturalSocietyin2009foundfemalevoicesappeartospeedupthegrowthoftomatoes.Theresearchoffersapossibleexplanation﹣women'svoiceswereattherightfrequencyfortheplantstohear. 1What'seveningprimroseflowers'responsetobees'buzz A.Longerbloom. B.Sweeternectar. C.Brightercolor. D.Lessfluid. 2WherecanplantsgrowbetteraccordingtoHadany A.Onasquare. B.Besideahighway. C.Inthewoods. D.Alongthestreet. 3Whatcanweinferfromtheresearch A.PrinceCharlesproveskindofstupid. B.Plantscanonlypotentiallyhearanimals. C.Plantsrespondtosoundsslowlyandecologically. D.Plantsgardenerstalktofrequentlydevelopwell. 4Whatdoesthetextmainlytalkabout A.Flowerscanhear. B.Beesarebestpollinators. C.Plantscan'tgrowwithoutsound. D.Women'svoicesimproveplants'growth.
10分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. Theworldseemstobefacingtwoproblem.Oneisthattoomanypeoplearedangerousover﹣weighted.Thistypeofproblemcalledobesity肥胖症.Obesityiswhenapersonhavemorethan25﹣30percentofbodyfat.Theotherproblemisaillnesscalledanorexia厌食症.Thisiswhenpeoplearedangerouslythinwearelessthan85%oftheirnormalbodyweight.Alloftheseproblemsareveryseriousbecauseofthebodycannotworkproperlywhenitistoofatortoothin.Theheartliverkidneysandlungswillnotbeabletokeepthebodyhealth. Peoplecandiefromillnessescausingbybeingtoofatortoothin.
It'softensaidthatyourparents'jobistomakesurethatonedayyounolongerneedthem.Andthat'scertainlythecasebythetimeyouhavekidsofyourown.Howeverthisispreciselythetimewhenyourparentsstarttoneedyou.Howdoyoutalktoyouragingparentsabouttheirhealth1butthesetipsmakeiteasier. Beforeaconversationyouhadbetterestablishyourselfasafriendnotanenemy.AlwaysstartwithanIstatementnotayoushouldstatement.2. Scientistsrecommendbeginningaconversationaboutsomethingyou'redoing﹣takingupyogatostayslimforinstance.3.Andyoucanevenhavehercommittodoingitwithyou.Whenyou'reafriendday﹣to﹣dayyourparentswilltrustyouandbeabletodependonyouduringahealthcrisis. 4.Startbyequippingthemwithasmartphonethat'sdesignedforseniors.Stayinginclosephonecontactwillkeepyouinformedofanyarisinghealthissues.Itwillhelpyoupickuponfaultsintheirmemorytoo. Yourparentsareyourparentsuntilthey'regone.Donottreatthemlikechildren.Evenifyoufindthatthere'sanemergencygoingonyoucanmakesuggestionsbuttheyhavetherighttomakedecisionsespeciallyifthere'snocognitive认知的disorder.5helpingyourparentsintheirlateryearsistheleastyoucando.Withthepropermeasuresandtechnologyitcangeteasierandfeelevenmorerewarding. A.Justastheyhavebeenthereforyou B.Itmaynotbeasimpleconversationtohave C.Itcanmeanchangesinyourparents'schedule D.Scientistsalsosuggestsphoningyourparentsregularly E.Thatcanleadtoaskingyourmomwhatshe'sdoingtokeepfit F.Talkaboutaffairsaboutyourselffirstthenextendthemtoyourparents G.Scientistsrecommendopeningthedoortodialogueinsteadofcallingthem
如图1是一块长为60cm的正方体薄铁片制作的一个长方体盒子如果要做一个没有盖的长方体盒子可先在薄铁片的四个角上截去四个相同的小正方形如图2然后把四边折合起来. 1求做成的盒子底面积ycm2与截去小正方形边长xcm2之间的函数关系式 2当做成的盒子的底面积为900cm2时试求该盒子的容积.
小明的身高为1.8米某一时刻他在阳光下的影长为2米与他邻近的一棵树的影长为6米则这棵树的高为
WhenyouthinkbacktotheblackboardfromyourschooldayswhatcolorisitChancesarethatit'sgreen.Sowhat'supwiththenameOriginallyblackboardswerereallyblack.Beforewall﹣sizedblackboardsexistedlate18th﹣centurystudentsusedtheirownminiboardsmadeofslate石板orpaintedwoodaccordingtoConcordiaUniversityThosefirstboardswereinfact.blackandtheypavedthewayforthelargerones. In1800whenaScottishheadmasternamedJamesPillanswantedhisstudentstodrawmapsthestudentscouldn'tdrawthemapstheirteacherwantedontheirtinyboardssoPillansputseveralslatestogethertocreatealargeboard.Problemsolved!Fromtheretheideaspreadquicklyasteacherscouldfinallyshowaconcepttothewholeclassatonetime.By1815themassivewritingspaceswerecommonenoughtoearntheirownname:blackboard. Thecolorchangecameinthe1960swhencompaniessoldsteelplatescoatedwithgreenenamel漆insteadofthetraditionaldarkslate.Thenewmaterialwaslighterandlessfragilethanthefirstblackboardssotheywerecheapertoshipandmorelikelytosurvivethejourney.Teachersweren'tcomplainingeither.Afterallthenewgreenboardsmadethechalkpowdereasiertoerase.Plustheenamelleftlessofaglareandthecolorwasnicertolookat.Atthatpointpeoplestartedusingthewordchalkboardasamoreaccuratedescriptorbutblackboardstillstuckaround. 1Whatdidthelate18th﹣centurystudentsuseinclass A.Blackboard. B.Chalkboard. C.Greenboard. D.Miniboard. 2Whydidtheheadmasteraskthestudentstoputtheirminiboardstogether A.Tomakeacomparison. B.Tomakeenoughspace. C.Todrawstudents'attention. D.Toarousestudents'interest. 3WhichofthefollowingisNOTtheadvantageofthegreenboard A.They'relighterinweight. B.They'remoreconvenienttotransport. C.Theyreeasiertoerasethepowder. D.They'remoreusefulthanthetraditionalones. 4What'sthemainideaofthetext A.Introductionoftheblackboard. B.Originoftheblackboard. C.Coloroftheblackboard. D.Functionoftheblackboard.
计算0+﹣1﹣﹣|﹣1|.
TodayMountQomolangma'speakisnotalonelyplaceanymore.Over3500peoplehave1successfulclimbedthemountainoverthepastyear.Meanwhileclimbershavecomplainedabout2waitforhoursinthebottlenecks. Infactthedangerous3crowdaren'ttheonlyproblem.Allthoseclimbersneed4bringalotofgear装置andmuchofthemendsupbeingleftonthemountains.becomingtheworld's5tallrubbishdump. Butthegoodnewsis6somemountaineersareovertakingittocleanupQomolangma.MountaineersPaulandEberhardarepartofEcoEverestExpeditionwhichhasbeencleaninguprubbishsince2008.Sofarthey7collectover13tonsofgarbage. Someofthatrubbishisevenbeingusedfor8higherpurpose.AspartoftheMountEverest8844ArtProject.agroupof15artistsNepalcollected1.5tonsofgarbage.They'vechangedthecansandoxygentanksinto74pieceofartthathaveareexhibited9Nepal'scapital.Partoftheprofitfromsales10beavailablefortheEverestPakeersAssociationwhichhashelpedolerubbishofthemountain.
甲骑自行车乙骑摩托沿相同路线由A地到B地行驶过程中路程与时间的函数关系的图象如图所示.根据图象可知 ①先出发的是填“甲”或“乙” ②甲的行驶速度是公里/分 ③乙的行驶速度是公里/分
Chinesedoubleamputee截肢climberXiaBoyureceivedthemostvotes1globaltobecomethe2019LaureusSportingMomentoftheYearwinneronMonday. Xiacameoutfromaninitiallistof10nomineesbeforethreefinalistsweremade2knowtothepublicearlierthismonth. Xiahadlostbothhislegsin1975duringhisfirstattempttoreach3world'shighestpeakofQomolangmaduetofrostbite.Hechallengedthesummitin20142015and20164 wellbuthisdreams5breakowingtoavalancheearthquakeandbadweatherrespectively. Xiafinallymade6inhisfifthattemptonMay142018becomingthefirstChinesedoubleamputeeclimber7reachthesummitofQomolangma. ClimbingtothesummitofQomolangmaisalwaysadreamandgoalforme.I8fightforitoverthepastdecades.DespitebadknocksseveraltimesInevergaveup.Ithinkthedeterminationmademylifesocolorfuland9meaningXiatoldChinesemedia. Xiaaddedthathisnextgoalwillbe7+2namelythehighestsummitsofseven10continentplustheSouthPoleandNorthpole.
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. LastsummervacationIworkedasavolunteerintheWolongChinaGiantPandaGardeninSichuanwhereIstayfortwoweeks.ThatIneededtodowastocleanthepandas'housesfeedthepandasormakefoodforthem.OnemalepandaItookcarewasnamedJingjing.ShewasoneofthemostinterestedpandasintheGarden.NormallythepandaisashycreaturenotusedtobeincontactwithotheranimalsparticularlyhumansbutJingjingseemedverydifferently.Heoftenreachedoutoneofhisfoottogreetmeandsmiledatme.Sometimeshetriedtomakemetolaugh.
Examplesofeffectiveconservationofplacesmattertotheworld.Theyrangefromthe1960sNubiancampaigntosafeguardAncientEgyptianmonumentsfromthewatersoftheAswanDamtotheremovalin2018oftheBelizeBarrierReeffromtheListofWorldHeritageinDanger.ConservationisthecorepurposeoftheWorldHeritageConventionanditmayalsobeitsbiggestchallenge. Thefollowingexampleshowshowsuccessesatspecificsitesnowserveasmodelsforconservationandsustainable可持续性development.AyearafterViennawasincludedontheWorldHeritageListin2001theWorldHeritageCommitteeWHCexpressedconcernsaboutthearchitecturalsolutionsandheightoffourplannedtowersoftheWien﹣Mitteproject.ThisdevelopmentprojectclosetotheHistoricCentreofViennainthesite'sbufferzonetheonethatliesbetweentwoormoreotherareasaffectedtheurbanscale规模andvisualeffectsinandaroundtheproperty地产.AsaresultoftheCommittee'sconcernsViennachangeditsbuildingcodesandlaunchedanewdesigncompetitionfortheWien﹣MitteprojecttoworkoutarchitecturalplanswithreducedsizeinkeepingwithWorldHeritageprotection. Thesuccessfulpracticeinspiredthegovernmentofthecitytoinviteover600expertsandprofessionalsfrom55countriestoaninternationalconferenceonWorldHeritageandcontemporaryarchitectureheldinViennainMay2005.TheglobaldiscussionthatfolloweddetailinganapproachtomanagingconservationanddevelopmentwasrecordedintheUNESCORecommendationin2011. TheRecommendationputforwardsanall﹣roundedandcombinedapproachtobalancingurbanheritage遗产conservationandeconomicdevelopmentarguingthatactiveprotectionandmanagementofurbanheritagesupportsthegoalofsustainabledevelopment. TheRecommendationsupportstheharmoniouscombinationofcontemporaryinvolvementintothehistoricurbanframeworkwhileholdingontovalueslinkedtohistorymemoryandtheenvironment. 1WhydoestheauthormentiontheBelizeBarrierReefinParagraph1 A.Toexplainthegoaloftheorganization B.Toencouragethepublictoprotecttheworld C.Toshowthepositiveeffectofconservation. D.Toremindpeopleoftheenvironmentalproblems. 2WhywasWHCworriedabouttheWien﹣Mitteproject A.Ittookuptoomuchpubliclandofthecity. B.IthadabadeffectontheHistoricCentreofVienna C.Itsoriginaldesignswerenotenvironmentallyfriendly. D.Itsarchitecturalsolutionscouldn'tmeetsafetystandards 3Whatdidtheglobaldiscussionfocuson A.Thewaystocombineconservationanddevelopment. B.ThecreationofthenewUNESCORecommendation C.Theinternationalurbanmanagementanddevelopment. D.ThestylesofthecontemporaryarchitectureofVienna. 4Whatistheauthor'spurposeinwritingthetext A.Toexaminethechallengesfacedbyglobalurbanplanners. B.Tointroducealternativewaysofprotectingtheenvironment. C.Tostresstheimportanceofthevalueofhistoryandmemory. D.Topromoteactiveconservationandsustainabledevelopment.
假定你是红星中学的李华你的英国朋友Peter热爱体育运动他将作为交换生到你校学习一年.请你给他写封邮件主要内容包括: 1.介绍你校体育课程及活动; 2.推荐一项中国传统体育项目. 注意:1.词数100左右; 2.可以适当增加细节以使行文连贯.
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