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高锰酸钾在化工医药、水处理等很多方面有重要应用，可以用电解法制备，装置如下．直流电源采用乙烷﹣空气的碱性燃料电池．下列说法不正确的是（已知电流效率η＝×100%）（ ）
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高三下学期化学《》真题及答案
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公平理论对报酬与分配在很多方面提供了有价值的建议请列举出其中的四个方面
数字图像处理包含很多方面的研究内容其中的目的是将一幅图像中有用的信息进行增强同时将无用的信息进行抑制
铅管在化工医药等方面使用较多其耐蚀性能强可用于输送
硝酸、次氯酸
高锰酸钾
盐酸
15%～65%的硫酸
崇拜消费渗透到了消费者行为的很多方面比如和
在化工医药等方面使用较多耐蚀性能强可用于输送硫酸二氧化硫氢氟酸醋酸但不能输送硝酸次氯酸高锰酸钾及盐酸
铅管
铜管
铝管
钛管
包装的功能体现在很多方面其中属营销功能的是
通过对比现实利用率与的差距得出的分析结果可以在多方面开展应用工作
质权人放弃质权原因可能是是质权人的意思表示取得出 质人同意
多方面、多方面、须
多方面、多方面、无须
多方面、单方面、须
多方面、单方面、无须
学校教育对儿童心理发展的影响表现在很多方面其中最重要的是一的影响
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近年来高铁酸钾K2FeO4已经被广泛应用在水处理方面高铁酸钾的氧化性超过高锰酸钾是一种集氧化吸附凝聚
①②③④
①③④⑥
②③④⑤
②③⑤⑥
仿人机器人具有人类的外观可以适应人类的生活和工作环境代替人类完成各种作业并可以在很多方面扩展人类的能
为什么人工湿地在水产养殖排放水处理方面有很大的应用前景
数字图像处理的主要研究内容包含很多方面请列出并简述其中的4种
认知偏差表现在很多方面突出的有
近年来高铁酸钾K2FeO4已经被广泛应用在水处理方面高铁酸钾的氧化性超过高锰酸钾是一种集氧化吸附凝聚
①②③④
①③④⑥
②③④⑤
②③⑤⑥
宝贝描述包括很多方面
有机化学知识在生活中应用广泛下列说法错误的是
利用天然气做燃料可以有效地减少“温室效应”的气体产生
由于乙醇能够溶解很多有机物和无机物，所以可用乙醇提取中药的有效成分
可以用浸泡过高锰酸钾溶液的硅土来吸收水果或花朵产生的乙烯，达到保鲜目的
从石油中可以获得乙烯，乙烯是一种重要的基本化工原料
学校教育对儿童心理发展的影响表现在很多方面其中最重要的是的影响
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一个组织的领导真正做到授权会表现在很多方面其中不包括
数字图像处理包含很多方面的研究内容其中的目的是根据二维平面图像数据构造出三维物体的图像
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Shelikeswearingshortsocksanda鲜艳的dress.
使代数式有意义的x取值范围是．
计算﹣12019+×sin60°﹣﹣3．
下列说法正确的是
某公司有如图所示的甲乙丙丁四个生产基地．现决定在其中一个基地修建总仓库以方便公司对各基地生产的产品进行集中存储．已知甲乙丙丁各基地的产量之比等于4542各基地之间的距离之比abcde＝23433因条件限制只有图示中的五条运输渠道当产品的运输数量和运输路程均相等时所需的运费相等．若要使总运费最低则修建总仓库的最佳位置为
Ihavealwaysthoughtofmyselfasadoer.InworkIcertainlywasandcontinuetobe.AsamomI'mmostlyadoer.Howevermy1forbreastcancermademe2Ihadn'tbeenadoerinthewayIwantedtobe﹣butthatwasaboutto3. SinceIbecamea4andreportedmanyplanecrashesI'vebeen5offlying.Myfamilyhad6beentoanothercontinenttogether.Nowthatthechemo化疗7asagifttomyselfmykidsandmymomItookthemalltoLondonto8lifebeforebeginningradiationeveryweekdayforsixweeks. ThistimeImadea9nottothinktoomuchaboutit.Lookinginthemirrorwithouthairyoudoyourbestto10yourdayasthoughitwereaday11youdiscoveredyourlump肿瘤.Theneverythingseemsdoable.12Ijustbookedthetrip.InLondoneverydayI13adifferentadventurefromwhichmyfamilyandIlearnedmuchand14ourselves. Ihadwantedtotakea15likethisforyearsbutlifeandworkhadgottenintheway.Now16lifeandworkwehadfinallydone17.Ihavethoroughlyenjoyedfamilylearning18livingbutnothingisbetterthanknowingthatmykidsfeel19forthetrip.Onedayperhapsthey'llrealizethatsometimesthebest20comesaftersurvivingyourgreatestfears. 1A.treatment B.reason C.concern D.anxiety 2A.ignore B.imagine C.realize D.doubt 3A.happen B.continue C.change D.arise 4A.pilot B.doctor C.tourist D.journalist 5A.tired B.fond C.afraid D.proud 6A.frequently B.already C.never D.just 7A.failed B.ended C.delayed D.approached 8A.save B.create C.celebrate D.improve 9A.wish B.decision C.judgment D.conclusion 10A.lookfor B.getridof C.lookbackon D.getthrough 11A.after B.before C.until D.when 12A.But B.So C.Otherwise D.Even 13A.expected B.planned C.experienced D.described 14A.enjoyed B.taught C.introduced D.trained 15A.rest B.lesson C.risk D.trip 16A.intermsof B.owingto C.regardlessof D.inadditionto 17A.them B.it C.everything D.something 18A.for B.by C.with D.beyond 19A.grateful B.eager C.ready D.sorry 20A.work B.chances C.love D.adventures
LastsummerholidayIlearnedtoswim.Itwasveryunforgettableandinterested.Iwenttotheswimmingpoolwithoutmyfather.Hetaughtmewhattoswim.AtfirstIwasafraidofdiveinthewater.AndIfeltuncomfortableinthewater.Butmyfathersaidhewillprotectme.ThenIbegantoswimandIcouldn'tswimforwardtoatall.Itmademeupset.Thenmyfathertoldmehowtomoveandhowtostretchoutmyhandandlegs.SlowIcouldmovealittle.Infactitwasnoteasy.Ilearneditforalmosthalfmonth.IwasexcitedwhenmyfathertoldmeImadeit.
beaccessibletobeaddictedtoputupwithcomeaboutglance…througheverytime 1Thebuildingthedisabledpeopleasithasnosteps. 2Thataccidentwasfrighteningbutnobodyknowshowit. 3CommercialadvertisementisoneofthethingsthatweredifficultwhenwatchingTV. 4Hepoemsandhopedtobeapoetoneday. 5theaccountshefoundtheenoughevidenceofthebribery.
分解因式x2+2x+1＝．
2019年“五一”假期期间我市共接待国内外游客140.42万人次实现旅游综合收入8.94亿元则“旅游综合收入”用科学记数法表示正确的是
SowhyhasEnglishchangedovertime?1actualalllanguageschangeanddevelop2culturesmeetandcommunicatewitheachother.AtfirsttheEnglishspokeninEnglandbetweenaboutAD450and1150wasverydifferentfromtheEnglish3speaktoday.ItwasbasedmoreonGerman4theEnglishwespeakatpresent.ThengraduallybetweenaboutAD800and1150Englishbecame5littlelikeGermanbecausethosewho6ruleEnglandspokefirstDanishandlaterFrench.ThesenewsettlersenrichedtheEnglishlanguageandespecially7itvocabulary.Sobythe1600'sShakespearewasabletomakeuseof8widervocabularythaneverbefore.In1620someBritishsettlersmovedtoAmerica.Laterinthe18thcenturysomeBritishpeople9taketoAustraliatoo.Englishbegantobespokeninboth10country.
Pleasesetoffearlierbecausethebusesrunless频繁地onSundays.
为了测量某山如图所示的高度甲在山顶A测得C处的俯角为45°D处的俯角为30°乙在山下测得CD之间的距离为400米．已知BCD在同一水平面的同一直线上求山高AB．可能用到的数据≈1.414≈1.732
Theaimoftheseexperimentswastofindtheconnectionifanybetweenthetwo现象.
下列运算正确的是
Differentweathermakespeoplefeeldifferent.Itinfluences影响healthintelligence智力andfeelings. InAugustitisveryhotandwetinthesouthernpartoftheUnitedStates1.IntheNortheastandtheMiddleWestitisveryhotatsometimesandverycoldatothertimes.PeopleinthesestateshavemorehearttroubleaftertheweatherchangesinFebruaryorMarch. Theweathercanalsoinfluenceintelligence.Forexampleina1983reportbyscientistsIQ智商ofagroupstudentswereveryhighwhenaverystrongwindcamebutafterthestrongwindtheirIQwas10%lower2.Veryhotweatherontheotherhand另一方面canmakeitlower.StudentsinmanyschoolsoftheUnitedStatesoftengetworseonexamsinthehotmonthsoftheyearJulyandAugust. Weatheralsohasastronginfluenceonpeople'sfeelings.Wintermaybeabadtimeforthinpeople.Theyusuallyfeelcoldduringthesemonths.Theymightfeelunhappyduringcoldweather3.Theyevendon'tliketooutdooractivities. Lowairpressure气压maymakepeopleforgetful4.Thereisagoodweatherforworkandhealth.Peoplefeelbestatatemperatureofabout18centigrade摄氏度. Areyoufeelingsadtiredforgetfulorunhappytoday?5. A.Itmaybetheweather'sproblem. B.Warmweathercanhaveabadeffectonhealth. C.Thewindcanhelppeoplehavehigherintelligence. D.Butfatpeoplemayhaveahardtimeinhotweather. E.Peoplemayhavehigherintelligencewhenlowairpressurecomes. F.Peopleleavemorebagsonbusesandinshopsonlow﹣pressuredays. G.Peopletherehavehearttroubleandotherkindsofhealthproblemsduringthismonth.
ScottandDanielHarryareenjoyingeverydaytaskslikeshoppingandwashingforthefirsttimefollowingtheirmovetoanaccommodation住宿supporthouseinKurwongbahnorthofBrisbanelastyear. DisabilityServicesQueensland'sStrengtheningNon﹣GovernmentOrganisationsprojectprovidedanaccommodationsupportmodelthatwouldenableresidents居住者likeDanielandScotttolivemoreindependently. Thehouseisjustoneofmanyaccommodationsupportservicesfunded资助throughtheproject.Thefive﹣bedroomhouseprovides24﹣hourcareforuptofourindividualswithcomplexneedsincludingmedicalsupport.Careandstaffinglevelsarevariedandflexibledependingoneachresident'srequirements. ScottandDanielwhohaveasevereformofDuchenneMuscularDystrophyrequire24﹣hoursupportinallactivitiesofdailyliving.Beforetheymovedtothehousetheylivedwiththeirfamily.Scottsayslivingathomewasdifficultasitplacedaphysicalandemotionalstrain负担ontheirparentswhohadtowakethemseveraltimeseachnighttorepositionthemorplacethemonbreathingmachines. WewereheavyheartedsaysScottwhoisplanningtowriteabookabouthislifeexperiences.Butourparentsnowhavealotmoretimeforthemselves.Wenowmanageourselvesonaday﹣to﹣daybasis. Danielisanenthusiasticgardenertakingcareofhisownvegetablegarden.Themensharethehousewithoneotheryoungmanandtheygotorugbyleaguegamesmeetingupwithfriends. LeedingCareAustraliaprovidesthecareserviceatKurwongbah.ManagerLeeGarnisssayssettingupthefacilities设施hasnotbeenwithoutitschallenges. ItisanunconventionalmodelofcareLeesays.ThehomeisScottandDaniel'shomehoweveritisalsoaworkplacefortheirsupportstaff.Balancingthesetworequirementshasbeenachallengeforall. Wehaveexperiencedabitofalearningphaseoverthelasttwelvemonths.HoweverbyworkingasateamwetryourbesttomeettheneedsofbothresidentsandstaffandIthinkwehaveachievedtherightbalance. 1WhatdoweknowaboutthehouseScottandDanielliveinnow? A.Itwasbuiltbytheirparents. B.Itcanaccommodatefourresidents. C.Itbelongstoagovernmentalproject. D.It'slocatedinthecenterofBrisbane. 2WhydidScottandDaniel'sparentswakeupfrequentlyatnight? A.Tohelpthemdoexercise. B.Theyweremakingalotofnoise. C.Tocheckontheirbreathing. D.Theywereunderemotionalpressure. 3HowdidScottfeelwhilelivingwithhisparents? A.Abitguilty. B.Quitehappy. C.Veryproud. D.Slightlyangry. 4Whatwasachallengewhilesettingupthefacilities? A.Lackoffund. B.Noworkplace. C.Inexperiencedstaffmembers. D.Satisfyingbothstaffandresidents'needs.
如图已知⊙O是△ABC的外接圆且BC为⊙O的直径在劣弧上取一点D使＝将△ADC沿AD对折得到△ADE连接CE． 1求证CE是⊙O的切线 2若CE＝CD劣弧的弧长为π求⊙O的半径．
假如你是李华你的好朋友苏茹在交友方面存在一些困难请根据下面的提示给她写一封信. 内容要点如下 1.要交朋友首先要做一个朋友 2.要和朋友同甘共苦患难之中的朋友才是真正的朋友 3.友谊需要时间和投入effort. 注意 1.词数100左右 2.可以适当增加细节以使行文连贯. 3.信的开头与结尾已为你拟好不计入总词数. DearSuRu Iamsorrytoknowthatyouarehavingtroubleinmakingfriends. Yours LiHua
Itisatruethatyoucan'tjudgeabookbyitscover.
Sheis期待aletterfromherbestfriend.
某种机器使用若干年后即被淘汰该机器有一易损零件为调查该易损零件的使用情况随机抽取了100台已被淘汰的这种机器经统计每台机器在使用期内更换的该易损零件数均只有891011这四种情况并整理了这100台机器在使用期内更换的该易损零件数绘制成如图所示不完整的条形统计图． 1请补全该条形统计图 2某公司计划购买一台这种机器以及若干个该易损零件用上述100台机器更换的该易损零件数的频率代替一台机器更换的该易损零件数发生的概率． ①求这台机器在使用期内共更换了9个该易损零件的概率 ②若在购买机器的同时购买该易损零件则每个200元若在使用过程中因备用该易损零件不足再购买则每个500元．请你帮该公司用花在该易损零件上的费用的加权平均数进行决策购买机器的同时应购买几个该易损零件可使公司的花费最少
﹣2的绝对值为
Chinahasannouncedit'sabolishingitsone﹣childpolicy.Whatdifferencehasitmadestatisticallyspeaking? 400millionbirthsprevented Theone﹣childpolicyofficiallyinplacesince1979hasprevented400millionbirths.Parentshavefacedfinesandotherpunishmentsforhavingmorechildren. ThemajorityofthedecreaseinChina'sfertilityratehappenedinthe1970s.Itdroppedfrom5.8childrenperwomanin1970to2.7in1978.Despitetheone﹣childpolicytheratehadonlyfallento1.7by2013. 2128﹣babydeathsrate Sincetheone﹣childpolicywasintroducedbabygirlshavebecomemorelikelytodiethanboys. Inthe1970saccordingtotheUnitedNations60malesper1000livebirthsdiedundertheageofone.Forgirlsthefigurewas53.Inthe1980saftertheone﹣childpolicybecameofficialtherateforbothwas36.Bythe1990s26malesper1000livebirthsdiedbeforetheageofone﹣and33girls.The2000ssaw21boysper1000livebirthsdyingand28girls. 1.16boysbornforeverygirl SexuallyselectiveabortionshavebeenconsideredasamajorcauseofChina'sunusualimbalance. Gietel﹣BastenassociateprofessorinsocialpolicyatOxfordUniversitysaysthebirthsofmanygirlsarenotregisteredifparentshavebrokentherulebyhavingtwochildrenaddingofficialsoftenturnablindeye.It'sestimatedtherearenow33millionmorementhanwomeninChina. 421families WiththeageingofChina'spopulationandthecontinuationoftheone﹣childpolicya421homeisthedescriptiongiventohouseholdsinwhichtherearefourgrandparentcaredforbytwoworkingageparentswhothemselveshaveonechild. By2050it'spredictedthataquarterofChina'spopulationwillbe65orolder.Thepredicteddeclineinthenumberofpeopleofworkingageisthoughttohavepersuadedthegovernmenttodroptheone﹣childpolicy. 1Whenwasthebabydeathsrateforbothboysandgirlsequal? A.Inthe1970s. B.Inthe1980s. C.Inthe1990s. D.Inthe2000s 2Whatmakestheone﹣childpolicyabolishedaccordingtothepassage? A.Thedeclineofbirthrate. B.Theriseofbabydeathsrate. C.Thechangeoffamilystructure. D.Thedeclineofworkingagepeople. 3Thepassagesumsuptheonechildpolicyby. A.number B.example C.contrast D.analysis
YouprobablyknowwhoMarieCuriewasbutyoumaynothaveheardofRachelCarson.Oftheoutstandingladieslistedbelowwhodoyouthinkwasthemostimportantwomanofthepast100years? JaneAddams1860﹣1935 AnyonewhohaseverbeenhelpedbyasocialworkerhasJaneAddamstothank.Addamshelpedthepoorandworkedforpeace.Sheencouragedasenseofcommunity社区bycreatingsheltersandpromotingeducationandservicesforpeopleinneedIn1931AddamsbecamethefirstAmericanwomantowintheNobelPeacePrize. RachelCarson1907﹣1964 Ifitweren'tforRachelCarsontheenvironmentalmovementmightnotexisttoday.Herpopular1962bookSilentSpringraisedawarenessofthedangersofpollutionandtheharmfuleffectsofchemicalsonhumansandontheworld'slakesandoceans. SandraDayO'Connor1930﹣present WhenSandraDayO'ConnorfinishedthirdinherclassatStanfordLawSchoolin1952shecouldnotfindworkatalawfirmbecauseshewasawoman.ShebecameanArizonastatesenator参议员andin1981thefirstwomantojointheU.S.SupremeCourt.O'Connorgavethedecidingvoteinmanyimportantcasesduringher24yearsonthetopcourt. RosaParks1913﹣2005 OnDecember11955inMontgomeryAlabamaRasaParkswouldnotgiveupherseatonabustoapassenger.HersimpleactlandedParksinprison.ButitalsosetofftheMontgomerybusboycott.Itlastedformorethanayearandkickedoffthecivil﹣rightsmovement.TheonlytiredIwaswastiredofgivinginsaidParks. 1WhatisJaneAddamswell﹣﹣knownforinhistory? A.Hereffortstowinaprize. B.Herlackofpropertraininginlaw. C.Hersocialwork. D.Hercommunitybackground. 2WhatisthereasonforO'Connor'sbeingrefusedbythelawfirm? A.Herlackofpropertraininginlaw. B.Herlittleworkexperienceincourt. C.Thediscriminationagainstwomen. D.Thepoorfinancialconditions. 3Whomadeagreatcontributiontothecivil﹣rightsmovementintheUS? A.JaneAddams. B.RosaParks C.SandraDay D.RachelCarson. 4Whatcanweinferaboutthewomenmentionedinthetext? A.Theyarehighlyeducated. B.Theyaretrulycreative. C.Theyarepeace﹣lovers. D.Theyarepioneers.
已知∠AOB＝60°OC是∠AOB的平分线点D为OC上一点过D作直线DE⊥OA垂足为点E且直线DE交OB于点F如图所示．若DE＝2则DF＝．
Whenpeopleusewordsand短语differentfromthestandardlanguageitiscalledadialect.
BecausemostJapanesepeopledon'treallyliketheideaofhavingaroommatealotoftheseyoungpeopleenduplivingaloneincludingyoungwomen.WhileTokyoismuchsaferthanlargecitiesinmanyothercountriescrimesdohappenandcriminalsoftenconsideryoungwomenwholivealonetobeeasytargets. Tohelpaddressthisproblemandalsotoputthemindsoffemaletenants房客ateaseapartmentmanagementcompanyLeoPalace21hasdevelopedwhatitcallstheManontheCurtainsystem. Usingaprojector投影仪controlledbyasmartphoneManontheCurtainthrowsanoutlineofamanontoyourcurtainssothatwhenpeopleoutsidelookatyourwindowstherewillappeartobeaguyinsidethusmaskingthatyoulivealone.Ifyou'rewonderinghowthat'sbetterthanjustputtingacardboardcutout剪贴画byyourwindowManontheCurtainisfull﹣motionprojectingvideosofactualactorsforanextremelylifelikelook. Currentlythesystemhas12differentoptionsincludingsuchfrighteningroutinesasabodybuilderworkingoutwithdumbbellsandasportsfanswingingabaseballbataroundwhichseemslikeitcoulddoubleasafitnessvideothatyoucoulddoyourselftogetherwithyourshadowyprotector. Sinceit'dbeeasytoinferthatashortsetpatternisafakeeachvideoisroughly30minuteslongwithavarietyofmotions. Grantedsomeoftheoptionssuchasthemanvacuumingorplayingguitararen'tgoingtobeaseffectiveifawould﹣becriminaliscloseenoughtothewindowtonoticethelackofsound.Buttheimagesthemselvesareveryconvincing. 1Whichofthefollowingstatementsisright? A.Tokyoisacityofnocrime. B.LadiesareeasilyrobbedinJapan. C.Onlyyoungladiesenjoybeingalone. D.LeoPalace21worksonapartmentaffairs. 2WhatistrueabouttheManontheCurtainSystem? A.It'sapopularmobileAPP. B.Itcanfindcriminalbehaviors. C.Itplaysavividcartoonfortenants. D.It'smainlydesignedforfemalelivingalone. 3WhatdoweknowaboutParagraph3? A.Cutoutsarebetterthanthesystem. B.Cutoutsaren'teffectiveatall. C.Peoplemaythinkyouarenotalone. D.Youcanwatchvideoswhenalone. 4Whatcanweinferaboutthesystemfromthelastparagraph? A.Itmaybeimprovedbythecompany. B.Itsvideowilllastlonger. C.Itsmotionsaren'tvividenough. D.Itwon'tbewellreceived.
如图直线y＝4﹣x与双曲线y＝交于AB两点过B作直线BC⊥y轴垂足为C则以OA为直径的圆与直线BC的交点坐标是．
Celebrities名人likeOliviaMunnaswellasfashioncompanieslikeCucciandVersaceareamongthosewhohavebeenopposed1wearinganimalfur.NowSanFranciscohasbecomethe2largecityintheUSAtobanretailersfromsellingnewfurtotheircustomers. Thebanaimstosend3strongmessagetothefurindustry4thecrueltytheseanimalsendureforthepurposeof5becomeclothingisnotconsistentwiththevalueofthecity. AsweallknowWestHollywoodbecamethefirstAmericancity6forbidthesaleofnewfuritemsin2011andBerkeleypassedabanonthesaleoffurclothingin2017.Additionallyin2000theUKledthecharge打头阵7followbyAustraliain2004.MorerecentlytheNetherlandstheEuropeanUnion'smaproduceroffurbannedfurfarmingin2012andplanstoendmink貂farmingby2024.In2018Norwaybannedfurfarmsand8endfoxandminkfarmingby2025. Hopefullyonlywheneffortslikethesearemadetoencourage9consumetostopbuyingrealanimalfur10thelivesofanimalsbefurtherprotectedallovertheworld.
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