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白磷与过量氢氧化钾溶液在一定条件下可以发生反应：P4+3KOH+3H2O═PH3↑+3KH2PO2，若用NA表示阿伏加德罗常数的值，下列说法不正确的是（ ）
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高三下学期化学《》真题及答案
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中和一定质量和一定质量分数的稀硫酸需用mg氢氧化钠若改用mg的氢氧化钾则反应后溶液的pH应当是
＝7
＜7
＞7
无法确定
阅读下列短文氢氧化钾化学式KOH的性质与氢氧化钠的性质相似A.纯净的氢氧化钾是白色固体B.它极易溶解
在一定条件下反应物溶液中溶质的质量分数越大化学反应的速率越快现有50g溶质质量分数为32％的硫酸溶液
氢氧化钾溶液
氯化钾溶液
碳酸钾溶液
水
在一定条件下能与甲烷发生反应的是
浓硫酸
氢氧化钠溶液
溴蒸汽
高锰酸钾溶液
下列物质中在一定条件下能和氢氧化钠溶液发生反应的是
乙醇
乙酸
油酯
汽油
已知有以下物质相互转化焰色反应显紫色说明D.溶液中含有K.元素又因为D.能和硝酸银溶液反应生成白色沉
下列物质中在一定条件下能和氢氧化钠溶液发生反应的是
汽油
菜油
甘油
煤油
现称取质量相等的氢氧化钠氢氧化钾固体分别置于两只烧杯中配成溶液.在氢氧化钠溶液中滴入一定质量盐酸恰好
下列碱和盐的反应能发生的是
氯化铜溶液中加入氢氧化铁
硝酸铝溶液中加入氢氧化钠
氢氧化钾溶液中加入硫化铜
碳酸钠中加入氢氧化钾
下列有关氢氧化钾的说法正确的是
氢氧化钾固体露置在空气中易变质
氢氧化钾溶液能使石蕊试液变红
氢氧化钾溶液与氧化铜反应生成蓝色沉淀
2 mL氢氧化钾溶液与1 mL硫酸溶液恰好完全反应
溴乙烷与氢氧化钾溶液共热既可生成乙烯又可生成乙醇其条件区别是
生成乙烯的是热的氢氧化钾的水溶液
生成乙醇的是热的氢氧化钾的水溶液
生成乙烯的是在170℃下进行的
生成乙醇的是热的氢氧化钾的醇溶液
右图→表示A.在一定条件下可以转化为B.—表示相连的两种物质间在一定条件下可以发生反应A.B.C.D
已知有以下物质相互转化焰色反应显紫色说明D.溶液中含有K.元素又因为D.能和硝酸银溶液反应生成白色沉
分类是研究物质的一种重要方法同类物质具有相似的化学性质学习完二氧化碳的性质后某化学兴趣小组的同学发现
在水溶液中一般不与其它物质发生复分解反应的是
硝酸钠
氢氧化钾
氢氧化铁
硝酸
氢氧化钾是一种重要的化工原料将贝壳主要成分是碳酸钙灼烧后的固体与草木灰主要成分是碳酸钾在水中相互作用
对氢氧化钾溶液叙述不正确的是
在溶液中，含有的氢氧化钾
在溶液中，含有的氢氧化钾
在的溶液中，含有的氢氧化钾
在溶液中，含有的氢氧化钾
下列物质在一定条件下可以跟CH4发生化学反应的是
酸性高锰酸钾溶液
溴水
氢氧化钠溶液
溴蒸气
下列有关氢氧化钾的说法正确的是
氢氧化钾固体露置在空气中易变质
氢氧化钾溶液能使石蕊溶液变红
氢氧化钾溶液与氧化铜反应生成蓝色沉淀
2mL氢氧化钾溶液与1mL硫酸溶液恰好完全反应
下列认识或做法中正确的是
借助酚酞试液可完成对稀硫酸．氢氧化钠溶液和氢氧化钡溶液的鉴别
铁能与稀盐酸．氯化铜溶液．硫酸锌溶液发生置换反应
氢氧化钾溶液能与盐酸．硫酸铜溶液．碳酸钠溶液发生复分解反应
用过量的氧化钙提纯混有盐酸的氯化钙溶液
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她想出了一个增加销售量的新主意. Sheanewideaforincreasingsales.
Daisywasalittlegirllongingtohelpendangeredwildlife.Onedayshefound1flyingcarpetbyherbedwhenshewokeup.She2begthecarpettotakehertoadistantlandwhereshecouldfindtheanimal3furwasusedtomakehersweater.SothecarpetflewtoTibetwithher. InTibetshesawanantelopethattoldhertheywerebeingkilled4mercybypeoplefortheirwoolandwerenowanendangeredspecies.5feelsadDaisytraveledtoZimbabwewiththecarpettoseetheelephantsthere.Muchtoherreliefthe6Africalivingthereprotectedtheelephantswellandtheirnumberwasgrowing.Happyand7satisfyDaisycametoathickrainforestinwhichshesawamonkeyrubbingamillipedeinsectoveritsbody.Daisyaskedthemonkey8itwasdoingthat.Themonkeyrespondedthatitwasprotecting9itfrommosquitoesbecausethemillipedecontainedanaturaldrugwhichaffectedmosquitoes. 10hopenomoreendangeredanimalswillbekilledsomeday.
8分Greenisanimportantcolorinnature.Itisthecolorofgrassandtheleavesontrees.Itisalsothecolorofmostgrowingplants. Sometimesthewordgreenmeansyoungfreshandgrowing.Sometimesitdescribessomethingthatisnotyetripeorfinished.Forexampleagreenhornissomeonewhohasnoexperiencewhoisnewtoasituation.Inthe15thcenturyagreenhornwasayoungcoworoxwhosehorns角hadnotyetdeveloped.Acenturylateragreenhornwasasoldierwhohadnotyethadanyexperienceinbattle.Bythe18thcenturyagreenhornhadthemeaningithastoday﹣apersonwhoisnewinajob. TheGreenRevolutionisthenamegivensomeyearsagotothedevelopmentofnewkindsofriceandothergrains.Thenewplantsproducedmuchlargercrops.TheGreenRevolutionwastheresultofhardworkbyagriculturalscientistswhohadgreenthumbs. Greenisalsothecolorusedtodescribethepowerfulfeelingjealousy嫉妒.Thegreen﹣eyedmonsterisnotafrighteningcreaturefromouterspace.ItisanexpressionusedaboutfourhundredyearsagobyBritishwriterWilliamShakespeareinhisplayOthello.Itdescribestheunpleasantfeelingapersonhaswhensomeonehassomethinghewants.Ayoungmanmaysufferfromthegreen﹣eyedmonsterifhisgirlfriendbeginsgoingoutwithsomeoneelse.Orthatgreen﹣eyedmonstermayaffectyourfriendifyougetapayriseandhedoesnot. 1Accordingtothepassageagreenhornmeansnow. A.apersonwhoisnewinajob B.anewsolider C.ayounghorse D.acowwithouthorns 2Apersonwhohasagreenthumbisaperson. A.whoisgoodatgrowingplants B.whosethumbsareofgreencolor C.whosegardenisgreenerthanothers' D.whoisyoungerthanhisneighbors 3Theauthorisactuallytalkingabout. A.colors B.language C.politics D.agriculture 4WhichofthefollowingstatementsisNOTtrueaccordingtothepassage? A.Inaboutthe16thcenturyagreenhornmeantanexperiencedsoldier. B.TheGreenRevolutionmayhavesomeconnectionwithgreenthumbs. C.Theexpressionthegreen﹣eyedmonsterwasprobablycreatedbyShakespeare. D.Thegreen﹣eyedmonstercanbeusedtodescribeapersonwhoisjealous.
15分请以Thenewspaperwhichhelpsmealot为题写一篇英语短文向同学们推荐这份报纸ChinaDaily.理由扩大词汇量提高阅读能力开拓视野等.
确保在离开之前所有的门都要锁上. thatallthedoorsarelockedbeforeyouleavethebuilding.
We'llbeexploringdifferentapproachestogathering信息.
你考试失败了.换句话说你没有通过驾照考试. Youfailedinthetest.youdidn'tpassthedrivingtest.
10分Istartedoutinlifewithfewadvantages.Ididnotgraduatefromhighschool.Iworkedatmenial不体面的jobs.Ihadlimited有限的educationlimitedskillsandalimitedfuture. AndthenIbeganaskingWhyaresomepeoplemoresuccessfulthanothers?Thisquestionchangedmylife. OvertheyearsIhavereadthousandsofbooksandarticlesonthesubjectsofsuccessandachievement成就.Itseemsthatthereasonsfortheseaccomplishmentshavebeendiscussedandwrittenaboutformorethantwothousandyearsineverypossibleway.Onequality品质thatmostphilosophersteachersandexpertsagreeonistheimportanceofself﹣discipline自律.AsAlTomsiksummarized总结ityearsagoSuccessistonsofdiscipline. SomeyearsagoIattendedaconferenceinWashington.ItwasthelunchbreakandIwaseatingatanearbyfoodfair.TheareawascrowdedandIsatdownatthelastopentablebymyselfeventhoughitwasatableforfour.Afewminuteslateranoldergentlemanandayoungerwomanwhowashisassistantcamealongcarryingtraysoffoodobviouslylookingforaplacetosit.WithplentyofroomatmytableIimmediatelyaroseandinvitedtheoldergentlemantojoinme.Hewashesitant犹豫的butIinsisted.Finallythankingmeashesatdownwebegantochatoverlunch. ItturnedoutthathisnamewasKopKopmeyer.AsithappenedIimmediatelyknewwhohewas.Hewasalegendinthefieldofsuccessandachievement.KopKopmeyerhadwrittenfourlargebookseachofwhichcontained250successprinciplesthathehadobtainedfrommorethanfiftyyearsofresearchandstudy.Ihadreadallfourbooksfromcovertocovermorethanonce. AfterwehadchattedforawhileIaskedhimthequestionthatmanypeopleinthissituationwouldaskOfalltheonethousandsuccessprinciplesthatyouhavediscoveredwhichdoyouthinkisthemostimportant? HesmiledatmewithatwinkleinhiseyeasifhehadbeenaskedthisquestionmanytimesandrepliedwithouthesitatingThemostimportantsuccessprincipleofallwasstatedbyThomasHuxleymanyyearsago.Hesaid'Dowhatyoushoulddowhenyoushoulddoitwhetheryoufeellikeitornot.' HewentontosayThereare999othersuccessprinciplesthatIhavefoundinmyreadingandexperiencebutwithoutself﹣disciplinenoneofthemwork. 1WhydidthewriteraskthequestioninParagraph2? A.Becausehewasn'tsatisfiedwithhimself. B.Becausehewasapersonofself﹣discipline. C.Becausehedislikethosesuccessfulpeople. D.Becausehewantedtosharehisideaonsuccess. 2Whatmadethewriterinvitetheoldergentlemantojoinhim? A.Hisgreatkindness. B.Thengentleman'sfame. C.Hiseagernessforsuccess. D.Thegentleman'sgoodmanners. 3Whatarethefourlargebooksabout? A.Personalchanges B.Thesecretofsuccess C.Sayingsofwisdom D.Thegentleman'slegend.
Itwillbecomewarmwhenspringcome.
Sheissupposedtoimprovingherbadattitude.
8分WecanvideochatwithastronautsaboardtheInternationalSpaceStationandwatchlivefootagefromthefrozenheightsofEverest.Butcommunicatingwithasubmarine潜艇oradiverisnotsoeasy.Thelackofpracticalmethodsforsharingdatabetweenunderwaterandairbornedeviceshaslongbeenafrustrationforscientists.Thedifficultystemsfromthefactthatradiosignalsworkperfectlyinairtravelbutpoorlyinwater.Sonar声呐signalsusedbyunderwatersensorsreflectoffthesurfaceofthewaterratherthanreachingtheair. NowresearchersatMIThavedevelopedamethodwiththepotentialtorevolutionizeunderwatercommunication.Whatwe'veshownisthatit'sactuallyfeasibletocommunicatefromunderwatertotheairsaysFadelAdibaprofessoratMJT'sMediaLabwholedtheresearch. TheMITresearchersdesignedasystemthatusesanunderwatermachinetosendsonarsignalstothesurfacemakingvibrations震动correspondingtothelsandOsofthedata.Asurfacereceiverthenreadsanddecodesthesetinyvibrations.TheresearcherscallthesystemTARF.Ithasanynumberofpotentialreal﹣worldusesAdibsays.Itcouldbeusedtofinddownedplanesunderwaterbyreadingsignalsfromsonardevicesinaplane'sblackboxanditcouldallowsubmarinestocommunicatewiththesurface. Rightnowthetechnologyislow﹣resolution.TheinitialstudywasconductedintheMITswimmingpoolatmaximumdepthsofaround11or12feet.ThenextstepsfortheresearchersaretoseeifTARFisworkableatmuchgreaterdepthsandundervaryingconditions﹣highwavesstormsschoolsoffish.Theyalsowanttoseeiftheycanmakethetechnologyworkintheotherdirection﹣airtowater. Ifthetechnologyprovessuccessfulinreal﹣worldconditionsexpecttextingwhiledivingtobethelatestunderwaterfashion. 1WhatdoestheauthormainlytalkaboutinParagraph1? A.Thefutureofvideochatunderwaterandinair. B.Thefrustrationsofdevelopingunderwaterdevices. C.Thedifficultyofcommunicationfromwatertoair. D.Thecurrentsituationofcommunicatingwithasubmarine. 2Whatdoestheunderlinedwordfeasiblemean? A.Achievable. B.Convenient. C.Changeable. D.Alternative. 3WhatdoweknowaboutTARF? A.Itiswidelyusedtofinddownedplanes. B.Itcanworkwellatgreatdepthsunderwater. C.Itisanunderwatermachinethatsendssignals. D.Itcansendreceiveandreadsignalsfromunderwater. 4Whatisthebesttitleforthetext? A.TheReal﹣worldUsesofSonarTechnology B.FullWater﹣to﹣airCommunicationClosertoReality C.ABreakthroughintheApplicationofVideoChat D.TARFBecomingaNewMeansofCommunication
30分IbelieveIhadtheperfectlife.BecauseIwasaboutto1myhighschoolandonmywaytocollegeIhadgreatfriendsandalovingfamily.Therewasnothing2.ButIspoketoosoon. Itwasaround925a.m.thatIheardthenewsthatwould3mylifeforeverMybrotherZachhadbeeninacaraccident.Hefoughtforfivedaysbeforehe4.ThatdayIbecameanonlychild.Ifeltextremely5. AfterZach'sdeathIfound6infood.IatethenIsleptthenIateagain.Icouldn'tcry.IcouldhardlyfeelanythingandIwas7.Istoppedbuildingrelationshipsforfearthattheywouldendjustas8asZach'slife.AlsoIbecamenervousaboutanypotentially9situations﹣drivinglateatnight﹣butIcouldn'texpressthisfearoflife10Iwantedtobestrongformyparents.Isawmyparents'11worsethanminebecauseofthelosingoftheirson.Ididn'twantthemto12me.Ialsoexperiencedalotof13becauseIwasangryaboutwhythesadnesshadhappenedtomeandInever14fromthisemotion. NowithasbeennearlyfiveyearssinceZach'sdeath.Idon't15lifeanymoreIfactitbravely.I16myfriendshipsandbegansocializingmore.Ieven17Zach'sstorywithpeoplearoundme.althoughmynewfriendsmethimtheyknowaboutZach. OnelessonIlearnedfromlosingmybrotherwasnevertobe18tosayIloveyou.Ilovedmybrotherbutitwastoolateto19itloudly.ThelasttimeIremembertellingmybrotherIlovedhimwaswhenhewaswhenhewasdying.Don'tmakethis20likeme. 1A.admit B.finish C.skip D.determine 2A.earning B.reaching C.competing D.missing 3A.regret B.change C.beautify D.solve 4A.tookaway B.gaveaway C.passedaway D.flewaway 5A.lonely B.tired C.bored D.nervous 6A.interest B.benefit C.guidance D.relief 7A.funny B.hopeful C.patient D.senseless 8A.finally B.suddenly C.nearly D.seriously 9A.difficult B.particular C.dangerous D.tense 10A.so B.if C.unless D.because 11A.pain B.discouragement C.willingness D.memory 12A.thinkabout B.dreamabout C.talkabout D.careabout 13A.surprise B.anger C.disappointment D.doubt 14A.escaped B.prevented C.stopped D.suffered 15A.damage B.choose C.fear D.leave 16A.produced B.rebuilt C.communicated D.raised 17A.copy B.advertise C.share D.perform 18A.stubborn B.satisfied C.brave D.afraid 19A.explore B.express C.spread D.pray 20A.mistake B.decision C.explanation D.difference
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