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下列实验方案中，可以达到实验目的是（ ）
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高三下学期化学《》真题及答案
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某生物兴趣小组的同学为证明某细菌对树叶的分解作用分别提出三种实验方案其共同之处是将同一种树的落叶分成
方案一
方案二
方案三
三个方案都不能达到
下列实验方案中实验设计能达到实验目的是
A
B
C
D
下列实验方案或实验操作能达到实验目的的是
检验氢气纯度时,没有听到任何响声,表明氢气已纯净
为证明暴露在空气中的 NaOH 溶液已变质，可加入 BaCl
要除去 CO2 中混有的少量 CO，可采用点燃的方法
用盐酸即可证明鸡蛋壳的主要成分中含有碳酸盐
下列实验方案中能达到实验目的是
如图是化学兴趣小组的几位同学设计的实验方案请回答下列问题I..上述实验设计与对应的实验目的表述不一致
下列实验方案能顺利达到实验目的的是
排空气法收集NO
乙醇萃取碘水中碘
过滤
量取9.3mLH
2
O
下列验证ZnFeAg三种金属活动性顺序的实验方案中-表示未进行金属与盐溶液之间的实验不能达到实验目的
A
B
C
D.
下列实验方案中实验设计能达到实验目的是
A
B
C
D
根据下列实验方案进行实验不能达到相应实验目的的是
测定空气中氧气的含量
检验氧气是否收集满
验证物质燃烧需要氧气
探究影响物质溶解性的因素
下列实验方案中可以达到实验目的是
A
B
C
D
综合实践活动中我们要对某一项目做试验考证拟定实验方案必须要 做到
注意事项、实验结论
实验目的、实验方法
实验报告、实验用具
实验方法、实验目的
下列实验方案不能达到目的的是
除去CO中的CO
2
验证可燃物燃烧的条件
探究空气中氧气的含量
探究影响物质溶解性的因素
.下列实验方案设计合理且能达到相应实验预期目的的是
下列实验方案能达到实验目的的是
用苯和饱和溴水制溴苯
用浓盐酸和铁粉制少量氯气
用NaOH溶液除去MgC12溶液中的AlC13杂质
用右图所示装置制备乙酸乙酯
根据下列实验方案进行实验不能达到相应实验目的是
下列实验方案中可以达到实验目的的是
用葡聚糖凝胶G-25分子筛层析去除蛋白质溶液中硫酸铵的实验原理是什么还可以用哪一种实验方法达到同样实
氢氧化钠固体在空气中易变质而含有碳酸钠某化学调研小组针对这一性质对某氢氧化钠固体进行探究活动I.确定
实验是学习化学的途径之一下列实验方案中不能达到实验目的的是
用硫酸锌溶液和铁验证锌、铁的活动性顺序
用相互刻画的方法比较黄铜和铜的硬度
用蘸有水和酒精的两个棉花团探究燃烧需要可燃物
用铁丝测定空气中氧气的含量
如图所示是验证铝铜银金属活动性顺序的4个实验方案其中能达到实验目的的是
只有①②
只有①④
只有③④
只有①③④
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有学生用五氧化二磷作为乙醇脱水制乙烯的催化剂进行相关实验．按如表所示的量和反应条件在三颈瓶中加入一定量P2O5再注入95%的乙醇并加热观察现象． 实验结果如下 根据上述材料完成下列填空． 写出实验室用乙醇制乙烯的化学方程式． 2如图装置中冷凝管的作用是 3实验1使溴的四氯化碳溶液褪色的物质是写结构简式 4根据实验12可以推断 ①以P2O5作为催化剂获得乙烯的反应条件是 ②P2O5与95%乙醇在水浴70℃加热条件下三颈瓶收集瓶中的液体经检验为磷酸三乙酯可以发生的有机反应的类型是反应．
目前回收溴单质的方法主要有水蒸气蒸馏法和萃取法等．某兴趣小组通过查阅相关资料拟采用如下方案从富马酸废液含溴0.27%中回收易挥发的Br2 1操作X所需要的主要玻璃仪器为反萃取时加入20%的NaOH溶液其离子方程式为． 2反萃取所得水相酸化时需缓慢加入浓硫酸并采用冰水浴冷却的原因是． 3溴的传统生产流程为先采用氯气氧化再用空气水蒸气将Br2吹出．与传统工艺相比萃取法的优点是． 4我国废水三级排放标准规定废水中苯酚的含量不得超过1.00mg/L．实验室可用一定浓度的溴水测定某废水中苯酚的含量其原理如下 ①请完成相应的实验步骤 步骤1准确量取25.00mL待测废水于250mL锥形瓶中． 步骤2将4.5mL0.02mol/L溴水迅速加入到锥形瓶中塞紧瓶塞振荡． 步骤3打开瓶塞向锥形瓶中加入过量的0.1mol/LKI溶液振荡． 步骤4再用0.01mol/LNa2S2O3标准溶液滴定至终点消耗Na2S2O3溶液15mL．反应原理I2+2Na2S2O3＝2NaI+Na2S4O6 步骤5将实验步骤1～4重复2次． ②该废水中苯酚的含量为mg/L． ③步骤3若持续时间较长则测得的废水中苯酚的含量填“偏高”“偏低”或“无影响”．
Hundredsofpeoplehaveformedimpressionsofyouthroughthatlittledevice装置onyourdesk.Andthey'veneveractually41you.Everythingtheyknowaboutyou42throughthisdevicesometimesfromhundredsofmilesaway.43heyfeeltheycanknowyou44fromthesoundofyourvoice.That'showpowerfulthe45is.Powerfulyesbutnotalways46.ForyearsIdealtwithmytravelagentonlybyphone.RanimyfacelessagentwhomI'dnevermet47gotmerock﹣bottompricesonairfarescarsandhotels.Buthercoldvoicereally48me.Isometimeswishedto49anotheragent.OnemorningIhadto50animmediateflighthomeforafamilyemergency.IranintoRani'soffice51.Thewomansittingatthedesk52mymadnesssympatheticallyjumpedup.Shegavemea53smilenoddedwhilelisteningpatientlyandthenprintedoutthe54immediately.'Whatawonderfullady!'Ithought.Rushingout55Icalledoutovermyshoulder'Bythewaywhat'syourname?''I'mRani'shesaid.Iturnedaroundandsawa56womanwithabigsmileonherfacewavingtowishmeasafetrip.Iwas57!WhyhadIthoughtshewascold?Raniwaswellso58.SittingbackinthecaronthewaytotheairportIfigureditallout.Rani's59﹣﹣﹣herwarmsmilehernodsher‘I'mhereforyou'60﹣﹣﹣wereallsilentsignalsthatdidn'ttravelthroughwires.41.A.accepted B.noticed C.heard D.met42.A.came B.moved C.ran D.developed43.A.Thus B.Yet C.Then D.Indeed44.A.rather B.also C.just D.already45.A.Telephone B.voice C.connection D.impression46.A.direct B.useful C.easy D.accurate47.A.inperson B.bymyself C.inpublic D.onpurpose48.A.annoyed B.interested C.discouraged D.confused49.A.promote B.train C.find D.know50.A.arrange B.postpone C.confirm D.book51.A.forthefirsttime B.atanytime C.fromtimetotime D.ingoodtime52.A.expecting B.seeing C.testing D.avoiding53.A.shy B.comforting C.familiar D.forced54.A.bill B.form C.ticket D.list55.A.hopefully B.disappointedly C.gratefully D.regretfully56.A.careful B.serious C.nervous D.pleasant57.A.amused B.worried C.helpless D.speechless58.A.calm B.nice C.proud D.clever59.A.forgiveness B.eagerness C.friendliness D.skillfulness60.A.explanation B.attitude C.concept D.Behavior
过渡元素铁可形成多种配合物如[FeCN6]4﹣FeSCN3等． 1Fe2+基态核外电子排布式为． 2科学研究表明用TiO2作光催化剂可将废水中CN﹣转化为OCN﹣并最终氧化为N2 CO2．OCN﹣中三种元素的电负性由大到小的顺序为． 3与CN﹣互为等电子体的一种分子为填化学式1molFeCN63﹣中含有σ键的数目为． 4铁的另一种配合物FeCO5熔点为﹣20.5℃沸点为103℃易溶于CCl4据此可以判断FeCO5晶体属于填晶体类型． 5铁铝合金的一种晶体属于面心立方结构其晶胞可看成由8个小体心立方结构堆砌而成．已知小立方体如图所示．该合金的化学式为．
某研究性学习小组设计了一组实验验证元素周期律． 1甲同学在abcd四只烧杯里分别加入50mL冷水再分别滴加几滴酚酞溶液依次加入大小相近的钠Na镁Mg铝Al钾K金属块观察现象． ①甲同学设计实验的目的是验证同一主族从上到下元素的元素金属性逐渐增强同一周期从左到右元素金属性 ②反应最剧烈的烧杯里金属是填字母 A钠B镁C铝D钾 ③写出a烧杯里发生反应的离子方程式． ④实验中发现bc两只烧杯中几乎没有什么现象要想达到实验的目的请你帮助选择下列合适的方法． A．把镁铝的金属块换成金属粉末 B．把烧杯中的冷水换成热水 C．把烧杯中的冷水换成盐酸 D．把烧杯中的冷水换成氢氧化钠溶液 2乙同学设计实验验证非金属元素的非金属性越强其最高价含氧酸的酸性就越强．他设计了如图装置以验证碳氮硅元素的非金属性强弱．乙同学设计的实验可直接证明三种酸的酸性强弱已知A是强酸其浓溶液在常温下可与铜反应B是块状固体烧杯中盛放C的水溶液打开分液漏斗的活塞后C中可观察到白色胶状沉淀生成． ①写出所选用物质的化学式AC． ②写出烧瓶中发生反应的化学方程式． ③碳氮硅三种元素的非金属性由强到弱顺序为．
Somysteriously______missingthatmanypuzzleswaittobesolved. A.didFlightMH370go B.FlightMH370went C.doesFlightMH370go D.hadFlightMH370gone
What'sOn?ElectricUnderground7.30pm﹣1.00amFreeattheCyclopsTheatreDoyouknowwho'splayinginyourarea?We'rebringingyouaneveningofliverockandpopmusicfromthebestlocalbands.Areyouinterestedinbecomingamusicianandgettingarecordingcontract合同?Ifsocomeearlytothetalkat7.30pmbyJulesSkyeasuccessfulrecordproducer.He'sgoingtotalkabouthowyoucanfindtherightpersontoproduceyoumusic.GeeWhizz8.30pm﹣10.30pmComedyatKaleidoscopeComeandseeGeeWhizzperform.He'sthefunnieststand﹣upcomedianonthecomedyscene.Thisjoyfulshowwillpleaseeveryonefromtheyoungesttotheoldest.GeeWhizzreallyknowshowtomakeyoulaugh!Ourbarisopenfrom7.00pmfordrinksandsnacks快餐.Simon'sWorkshop5.00pm﹣7.30pmWednesdaysatVictoriaStageThisisagoodchanceforanyonewhowantstolearnhowtodocomedy.Theworkshoplooksateverykindofcomedyandpracticesmanydifferentwaysofmakingpeoplelaugh.Simonisacomedianandactorwhohas10years'experienceofteachingcomedy.Hisworkshopsareexcitingandfun.AneveningwithSimonwillgiveyoutheconfidencetobefunny.CharlotteStone8.00pm﹣11.00pmPizzaWorldFinefoodwithbeautifuljazzmusicthisisagreateveningout.CharlotteStonewillperformsongsfromhernewbest﹣sellingCDwithJamesPickeringonthepiano.ThemenuisItalianwithexcellentmeatandfreshfishpizzasandpasta面食.Bookearlytogetatable.Ourbarisopenalldayandservescocktailscoffeebeerandwhitewine.21.Whocanhelpyouifyouwanttohaveyourmusicproduced?A.JulesSkye.B.GeeWhizz.C.CharlotteStone.D.JamesPickering.22.Atwhichplacecanpeopleofdifferentagesenjoyagoodlaugh?A.TheCyclopsTheatreB.KaleidoscopeC.VictoriaStageD.PizzaWorld23.WhatdoweknowaboutSimon'sWorkshop?A.Itrequiresmembershipstatus.B.Itlaststhreehourseachtime.C.Itisrunbyacomedyclub.D.ItisheldeveryWednesday.24.WhenwillCharlotteStoneperformhersongs?A.5.00pm﹣7.30pm.B.7.30pm﹣1.00am.C.8.00pm﹣11.00pm.D.8.30pm﹣10.30pm.
﹣﹣﹣Weshalltaketheconditionyou'veattachedtothisprojectintocarefulconsideration. ﹣﹣﹣Thanksalot. A.where B.when C.which D.what
AnewcollectionofphotosbringsanunsuccessfulAntarcticvoyagebacktolife.FrankHurley'spictureswouldbeoutstanding﹣﹣﹣﹣undoubtedlyfirst﹣ratephoto﹣journalism﹣﹣﹣iftheyhadbeenmadelastweek.Infacttheywereshotfrom1914through1916mostofthemafteradisastrousshipwreck海难byacameramanwhohadnoreasonableexpectationofsurvival.Manyoftheimageswerestoredinanicechestunderfreezingwaterinthedamagedwoodenship.TheshipwastheEnduranceasmalltightNorwegian﹣builtthree﹣masterthatwasintendedtotakeSirErnestShackletonandasmallcrewofseamenandscientists27meninalltothesouthernmostshoreofAntarctica'sWeddellSea.FromthatpointShackletonwantedtoforceapassagebydogsled雪橇acrossthecontinent.ThejourneywasintendedtoachievemorethanwhatCaptainRobertFalconScotthaddone.CaptainScotthadreachedtheSouthPoleearlyin1912buthaddiedwithhisfourcompanionsonthemarchback.AswriterCarolineAlexandermakesclearinherforcefulandwell﹣researchedstoryTheEnduranceadventuringwaseventhenathoroughlycommercialeffort.Scott'slastjourneycompletedasbelayinatentdyingofcoldandhungercaughttheworld'simaginationandafilmmadeinhishonordrewcrowds.ShackletonaonetimeBritishmerchant﹣navyofficerwhohadgottowithin100milesoftheSouthPolein1908startedabusinessbeforehis1914voyagetomakemoneyfrommovieandstillphotography.FrankHurleyaconfidentandgiftedAustralianphotographerwhoknewtheAntarcticwashiredtomaketheimagesmostofwhichhaveneverbeforebeenpublished.33.WhatdoweknowaboutthephotostakenbyHurley?A.TheyweremadelastweekB.TheyshowedunderseasceneriesC.TheywerefoundbyacameramanD.Theyrecordedadisastrousadventure34.WhoreachedtheSouthPolefirstaccordingtothetext?A.FrankHurleyB.ErnestShackletonC.RobertFalconScottD.CarolineAlexander35.WhatdoesAlexanderthinkwasthepurposeofthe1914voyage?A.ArtisticcreationB.ScientificresearchC.MoneymakingD.Treasurehunting.
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Peoplecomeintoyourlifeforareasonaseasonoralifetime.Whenyouwhichoneitisyouwillknowwhattodoforeachperson. A.giveout B.leaveout C.turnout D.figureout
25分阅读下面短文然后按照要求写一篇150词左右的英语短文. 【写作内容】 1.以约30个词概括以上短文的主要内容. 2.以约120个词发表你的观点内容包括 1具体分析导致忽视汉语学习的原因2从政府和学校来谈谈该如何做来改变这一现象. 【写作要求】 1.作文中不得直接引用原文中的句子2.作文中不能出现真实姓名和学校名称. 【评分标准】概括准确语言规范内容合适篇章连贯.
6分Mymomonlyhadoneeye.Ihatedhershewassuchanembarrassment.Mymomranasmallshopatafleamarket.Shecollectedlittleweedsandsuchtosellanythingforthemoneyweneeded.Therewasthisonedayduringelementaryschool.Irememberthatitwasfielddayandmymomcame.Iwassoembarrassed.Howcouldshedothistome?Ithrewherahatefullookandranout.IwishedthatmymomwouldjustdisappearfromthisworldsoIsaidtomymom'Momwhydon'tyouhavetheothereye?!You'reonlygoingtomakemealaughingstock.Whydon'tyoujustdie?'Mymomdidnotrespond.ThatnightIwokeupandwenttothekitchentogetaglassofwater.Mymomwascryingtheresoquietlyasifshewasafraidthatshemightwakeme.Itookalookatherandthenturnedaway.BecauseofthethingIhadsaidtoherearliertherewassomethingpinchingatmeinthecornerofmyheart.EvensoIhatedmymotherwhowascryingoutofheroneeye.SoItoldmyselfthatIwouldgrowupandbecomesuccessfulbecauseIhatedmyone﹣eyedmomandourdesperatepoverty.ThenIstudiedreallyhard.IleftmymotherandcametoSeoulandstudiedandgotacceptedintheSeoulUniversitywithalltheconfidenceIhad.ThenIgotmarried.I'mlivinghappilyasasuccessfulman.Ilikeitherebecauseit'saplacethatdoesn'tremindmeofmymom.Thishappinesswasgettingbiggerandbiggerwhensomeoneunexpectedcametoseeme'What?!Who'sthis?!'ItwasmymotherStillwithheroneeye.Itfeltasifthewholeskywasfallingapartonme.Mylittlegirlranawayscaredofmymom'seye.AndIaskedher'Whoareyou?Idon'tknowyou!!'asifItriedtomakethatreal.Iscreamedather'Howdareyoucometomyhouseandscaremydaughter!Getoutofherenow!!'Andtothismymotherquietlyanswered'ohI'msosorry.Imayhavegottenthewrongaddress'andshedisappeared.Thankgoodnessshedoesn'trecognizeme.Iwasquiterelieved.ItoldmyselfthatIwasn'tgoingtocareorthinkaboutthisfortherestofmylife.Onedayaletterregardingaschoolreunioncametomyhouse.IliedtomywifesayingthatIwasgoingonabusinesstrip.AfterthereunionIwentdowntotheoldshackthatIusedtocallahousejustoutofcuriositythereIfoundmymotherfallenonthecoldground.ButIdidnotshedasingletear.Shehadapieceofpaperinherhand.itwasalettertome.ShewroteMysonIthinkmylifehasbeenlongenoughnow.AndIwon'tvisitSeoulanymorebutwoulditbetoomuchtoaskifIwantedyoutocomevisitmeonceinawhile?Imissyousomuch.AndIwassogladwhenIheardyouwerecomingforthereunion.ButIdecidednottogototheschool.ForyouI'msorrythatIonlyhaveoneeyeandIwasanembarrassmentforyou.Youseewhenyouwereverylittleyougotintoanaccidentandlostyoureye.AsamotherIcouldn'tstandwatchingyouhavingtogrowupwithonlyoneeyesoIgaveyoumineIwassoproudofmysonthatwasseeingawholenewworldformeinmyplacewiththateye.Thecoupletimesthatyouwereangrywithme.Ithoughttomyself‘it'sbecausehelovesme.'Iloveyou.Youmeantheworldtome.MyWorldShattered.Ihatedthepersonwhoonlylivedforme.IcriedforMyMotherIdidn'tknowofanywaythatwillmakeupformyworstdeeds1Thewriterthoughthismotherwassuchanembarrassmentbecause?A.hismotheronlyhadoneeyeB.hismotherranasmallshopatafleamarketC.hismotherwenttohisschoolD.hismotherwasdesperatelypoor2WhichofthefollowingisNOTtrueaccordingtothepassage?A.Thewriter'smothergavehimoneofhereyes.B.Thewritergotmarriedafterhehadfinishedschoolinanothercity.C.Thewriter'sclassmatelaughedathimbecauseofhismother.D.Thewriter'smothergotawrongaddressandcouldn'tfindherson3Whichoneisthebesttitle?A.Anembarrassmentorapride?B.AletterfrommymotherC.CharmoftheloveD.Theroadtogrowth
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FiveyearsagowhenItaughtartataschoolinSeattleIusedTinkertoysasatestatthebeginningofatermtofindoutsomethingaboutmystudents.IputasmallsetofTinkertoysinfrontofeachstudentandsaid'MakesomethingoutoftheTinkertoys.Youhave45minutestoday﹣and45minuteseachdayfortherestoftheweek.'Afewstudentshesitatedtostart.Theywaitedtoseetherestoftheclasswoulddo.Severalotherscheckedtheinstructionsandmadesomethingaccordingtooneofthemodelplansprovided.Anothergroupbuiltsomethingoutoftheirownimaginations.OnceIhadaboywhoworkedexperimentallywithTinkertoysinhisfreetime.Hisconstructionsfilledashelfintheartclassroomandagoodpartofhisbedroomathome.Iwasdelightedatthepresenceofsuchastudent.Herewasanexceptionallycreativemindatwork.HispresencemeantthatIhadanunexpectedteachingassistantinclasswhosecreativitywouldinfect感染otherstudents.Encouragingthiskindofthinkinghasadownside.Irantheriskoflosingthosestudentswhohadadifferentstyleofthinking.Withoutfailonewoulddeclare'ButI'mjustnotcreative.''Doyoudreamatnightwhenyou'reasleep?''Ohsure.''Sotellmeoneofyourmostinterestingdreams.'Thestudentwouldtellsomethingwildlyimaginative.Flyingintheskyorinatimemachineorgrowingthreeheads.'That'sprettycreative.Whodoesthatforyou?''Nobody.Idoit.''Really﹣atnightwhenyou'reasleep?''Sure.''Trydoingitinthedaytimeinclassokay?'25.TheteacherusedTinkertoysinclassinorderto?A.knowmoreaboutthestudentsB.makethelessonsmoreexcitingC.raisethestudents'interestinartD.teachthestudentsabouttoydesign26.WhatdoweknowabouttheboymentionedinParagraph3?A.Helikedtohelphisteacher.B.Hepreferredtostudyalone.C.Hewasactiveinclass.D.Hewasimaginative.27.Whatdoestheunderlinedword'downside'inParagraph4probablymean?A.Mistake.B.Drawback.C.Difficulty.D.Burden.28.Whydidtheteacheraskthestudentstotalkabouttheirdreams?A.Tohelpthemtoseetheircreativity.B.Tofindoutabouttheirsleepinghabits.C.Tohelpthemtoimprovetheirmemory.D.Tofindoutabouttheirwaysofthinking.
探究氨气及铵盐性质的过程中下列根据实验现象得出的结论不正确的是
铜～锌原电池如图所示电解质溶液为稀硫酸下列说法不正确的是
根据金属活动顺序表Cu不能发生如下反应Cu+2H2O＝CuOH2↓+H2↑．但选择恰当电极材料和电解液进行电解这个反应就能变为现实．下列四种电极材料和电解液中能实现该反应最为恰当的是
Readingcanbeasocialactivity.Thinkofthepeoplewhobelongtobookgroups.Theychoosebookstoreadandthenmeettodiscussthem.NowthewebsiteBookCrossing.comBookCrossing.comturnsthepageonthetraditionalideaofabookgroup.Membersgoonthesiteandregisterthebookstheyownandwouldliketoshare.BookCrossingprovidesanidentificationnumbertostickinsidethebook.Thenthepersonleavesitinapublicplacehopingthatthebookwillhaveanadventuretravelingfarandwidewitheachnewreaderwhofindsit.BrucePedersonthemanagingdirectorofBookCrossingsays'Thetwothingsthatchangeyourlifearethepeopleyoumeetandbooksyouread.BookCrossingcombinesboth.'Membersleavebooksonparkbenchesandbusesintrainstationsandcoffeeshops.Whoeverfindstheirbookwillgotothesiteandrecordwheretheyfoundit.Peoplewhofindabookcanalsoleaveajournalentrydescribingwhattheythoughtofit.E﹣mailsarethensenttotheBookCrossingtokeepthemupdatedaboutwheretheirbookshavebeenfound.Brucepetersonsaystheideaisforpeoplenottobeselfishbykeepingabooktogatherdustonashelfathome.BookCrossingispartofatrendamongpeoplewhowanttogetbacktothe'real'andnotthevirtual虚拟.Thesitenowhasmorethanonemillionmembersinmorethanonehundredthirty﹣fivecountries.29.Whydoestheauthormentionbookgroupsinthefirstparagraph?A.Toexplainwhattheyare.B.TointroduceBookCrossing.C.Tostresstheimportanceofreading.D.Toencouragereaderstosharetheirideas.30.Whatdoestheunderlinedword'it'inParagraph2referto?A.Thebook.B.Anadventure.C.Apublicplace.D.Theidentificationnumber.31.WhatwillaBookCrosserdowithabookafterreadingit?A.Meetotherreaderstodiscussit.B.Keepitsafeinhisbookcase.C.Passitontoanotherreader.D.Mailitbacktoitsowner.32.Whatisthebesttitleforthetext?A.OnlineReadingAVirtualTourB.ElectronicBooksAnewTrendC.ABookGroupBringsTraditionBackD.AWebsiteLinksPeoplethroughBooks.
已知NH3和HCl都是能用来做喷泉实验的气体．若在同温同压下用等体积烧瓶一个收集满NH3另一个收集HCl和N2的混合气体如图所示．喷泉实验停止后两个烧瓶内溶液的关系是不考虑烧瓶内溶质的扩散氨水的溶质按NH3计算
Ifyoufeelstressedbyresponsibilitiesatworkyoushouldtakeastepbackandidentify识别thoseof61greatandlessimportance.Thenhandlethemostimportanttasksfirstsoyou'llfeelarealsenseof62achieve.Leavingthelessimportantthingsuntiltomorrow63beoftenacceptable.Mostofusaremorefocused64ourtasksinthemorningthanwearelaterintheday.Sogetanearlystartandtrytobeasproductive65possiblebeforelunch.Thiswillgiveyoutheconfidenceyouneedtogetyouthroughtheafternoonandgohomefeelingaccomplished.Recent66studyshowthatwearefarmoreproductiveatworkifwetakeshortbreaks67regular.Giveyourbodyandbrainarestbysteppingoutsidefor68whileexercisingordoingsomethingyouenjoy.Ifyoufindsomethingyoulovedoingoutsideoftheofficeyou'llbelesslikely69bringyourworkhome.Itcouldbeanything﹣gardeningcookingmusicsports﹣butwhateveritis70makesureit'sarelieffromdailystressratherthananotherthingtoworryabout.
6分AfewthingstoconsiderbeforebookingaflightWithfuelcostsrisingandairlinesfindingmorefeestoimposeontravelerseverydayairfareisn'tgettinganycheaper.Sinceyoucan'tdrivetoallyourdreamdestinationsflyingistheonlywaytogosometimesandundeniablythefastest.Luckilythereareplentyofwaystofindthemostaffordablefaresandalsoavoidpayingasmanyextrachargesaspossiblewhenyouplanahead.GettingthebestfareAirlinesputouttheirfaresalesonTuesdaymorningmakingthisdaythebestdaytobookaflightforless.Flyduringtheleastpopulartimes.TuesdayWednesdayandSaturdayaretheslowestdaystoflywhichmeanscheaperdealsthantherestoftheweek.Youcanalsofindreducedratesonearlymorningflightssincemanypeopledon'tliketogetupbeforethesuntogettotheairport.Earlierboardingtimescanalsoconsiderablycutdownyourchancesofgettingbumpedonanoverbookedflightordelayedbecauseofotherdelayedflightsormechanicalissues.Chooseyourseatlater.Someairlineschargeyoutopickyourseatwhenyoubookonlineaddingevenmoretothebottomlineofyourticketcost.Ifyoushowupearlyonyourtraveldayyoucanstillgetsuitableseats.Someofthebestseatsgetheldbackuntilflightdayunlessothersarewillingtopayextraforthemaheadoftimesoyoustillhavethechanceatoneofthose.Flyonholidays.Youalreadyknowthatsummeristhemostexpensivetimetoflyandeventhoughmostothertimesaremoreaffordablethedayssurroundingholidayscanbecrazy.Savebigifyou'rewillingtotravelonmajorholidayssuchasThanksgivingandChristmas.Don'twaituntilthelast﹣minutetobook.Manytravelersdon'tknowthatthere'sasweetspotforbookingandgettingthebestpriceonyourtickets.Booktooearlyortoolateandyoucouldenduppayingmorethanyouneedto.Thebesttimetobookisbetweenthreemonthsandsixweeksfromwhenyouwanttotravel.AvoidingextrafeesAirlineswillchargeforjustaboutanythingthesedays.Somehaveeventoyedaroundwithchargingcustomersforusingtherestroom.Allthoseextrafeescancertainlyaddupbutthere'snoreasontopaythemifyoudon'thaveto.Herearesometipstokeepmoneyinyourwalletonceyougettotheairport.Avoidtheupgradeit'snotnecessary.Sometimesupgradesarefreebutmostlyyouwillbechargedforseekingalast﹣minutebumptofirstclassandthecostcanbehefty.Flycarry﹣ononly.Baggagefeesvarywildlybutalmostallairlineschargethemandchargebig.Whypayforyourclothestoflywithyou?Ifeveryoneinyourtravelpartychecksabagyourbillcanbeastronomicalbeforeyoueverevengettoyourdestination.It'seasytoreducetheamountofstuffyoupackMakesureallyourclothingcoordinatessoyoucantakelessandstillmakemoreoutfitcombinationstakeonlytwopairofshoesplantodoabitoflaundryonyourtripandbringonlytravel﹣sizedtoiletries.Packyourownsnacks.Unlessyou'reflyinginternationallyit'srareyourflightcomeswithafreemeal.Snacksontheplanearenotcheapandalmostneverhealthy.Don'trelyonwhat'sonthesmallmenuandinsteadtucksomeofyourownsnacks﹣granolabarshomemademuffinsfruitandtrailmixallmakefantastictravelfoods﹣intoyourbagandeatalotbetterandcheaperthanotherpassengers.Doyouhaveatriedandtruemethodofgettingthebestdealonyourflights?Letusknow.1TosavemoneywhichoneshouldNOTbethechoice?A.EarlymorningflightsB.EarlyboardingtimesC.TheflightsonSaturdayD.TheflightsonSummerholiday2Accordingtothepassagewhichoneisright?A.Ifyoushowupearlyonyourtraveldayyoucangetthebestseats.B.Youcansavebigifyou'rewillingtotravelonChristmaseve.C.Youwillbechargedforseekingtheupgradesandthecostcanbehigh.D.Ifyou'reflyinginternationallyyourflightwillcomewithafreemeal.3Accordingtothepassageyoucandothethingsexcepttoavoidextrafees.A.Usetherestroom.B.TuckyourownsnacksC.Flywithcarry﹣ononly.D.Avoidtheupgrade.
20分FewAmericansstayinoneplaceforalifetime.We1fromthecitytothesuburbsfromhighschooltocollegeinadifferentstatefromajobinoneregiontoabetterjob2fromthehomewherewe3ourchildrentothehomewhereweplantolivein4.Witheachmoveweare5makingnewfriendswhobecomepartofournewlife.Formanyofusthe6isaspecialtimeforformingnewfriendships.TodaymillionsofAmericansgoonvocation7andtheygonotonlytoseenewsightsbutalso﹣inthoseplaceswheretheydonotfeeltoo8﹣withthehopeofmeetingnewpeople.Noonereally9avacationtriptoproduceaclosefriendbutthebeginningofafriendshipispossible.Surelyineverycountrypeople10friendship?Theword'friend'toAmericanpeoplecanbe11toawiderangeofrelationships﹣tosomeoneonehasknownforafewweeksinanewplacetoaclosebusinesscompaniontoachildhoodplaymatetoamanorwomantoa12colleague.Therearereal13amongtheserelationsforAmericans﹣afriendshipmaybe14casualsituationalordeepandlasting.ButtoaEuropeanwhoseesonlyoursurfacebehaviorthedifferencesarenotclear.AsEuropeansseeitallkindsof'friends'flow15ofAmericans'homeswithlittleceremony.Theymaybeparentsofthechildren'sfriendshouseguestsofneighborsmembersofacommitteebusinessassociatesfromanothertownorevenanothercountry.16asaguestintoanAmericanhometheEuropeanvisitorfindsno17differences.Theatmosphereis18.Mostpeopleoldandyoungarecalled19firstnames.Americans'characteristicopennesstodifferentstylesofrelationshipmakesitpossibleforustofindnewfriendsabroadwithwhomwefeel20.1A.drive B.commute C.move D.settle2A.abroad B.elsewhere C.somewhere D.nowhere3A.deliver B.protect C.educate D.raise4A.retirement B.death C.illness D.sadness5A.mostly B.mainly C.rarely D.forever6A.winter. B.summer C.spring D.autumn7A.along B.freely C.together D.abroad8A.alone B.strange C.scared D.remote9A.allows B.desires C.expects D.imagines10A.form B.develop C.ignore D.value11A.used B.applied C.stuck D.dedicated12A.kind B.generous C.trusted D.helpful13A.differences B.varieties C.distinctions D.diversities14A.informal B.reliable C.shallow D.fragile15A.inandout B.onandon C.byandby D.upanddown16A.Moving B.Flowing C.Going D.Coming17A.obvious B.heavy C.apparent D.strong18A.weird B.stressed C.relaxed D.strange19A.with B.on C.for D.by20A.atbest B.athome C.atheart D.athand
Agardenthat'sjustrightforyouHaveyouevervisitedagardenthatseemedjustrightforyouwheretheatmosphereofthegardenappearedtototalmorethanthesum总和ofitsparts?36.Butitdoesn'thappenbyaccident.Itstartswithlookinginsideyourselfandunderstandingwhoyouarewithrespecttothenaturalworldandhowyouapproachthegardeningprocess.●37Somepeoplemaythinkthatagardenisnomorethanplantsflowerspatternsandmassesofcolor.Othersareconcernedaboutusinggardeningmethodsthatrequirelesswaterandfewerfertilizers肥料.38.Howeverthereareanumberofotherreasonsthatmightexplainwhyyouwanttogarden.Oneofthemcomesfromourearliestyears.●Recall回忆yourchildhoodmemoriesOurmodelofwhatagardenshouldbeoftengoesbacktochildhood.Grandma'srosegardenandDad'svegetablegardenmightbegoodorbadbutthat'snotwhat'simportant.39﹣﹣howbeinginthosegardensmadeusfeel.Ifyou'dliketobuildapowerfulbondwithyourgardenstartbytakingsometimetorecallthegardensofyouryouth.40thengooutsideandworkoutaplantotranslateyourchildhoodmemoriesintoyourgrown﹣upgarden.Havefun.A.KnowwhyyougardenB.FindagoodplaceforyourowngardenC.It'sourexperienceofthegardenthatmattersD.It'sdelightfultoseesomanybeautifulflowersE.StillothersmaysimplyenjoybeingoutdoorsandclosetoplantsF.YoucanproducethatkindofmagicalqualityinyourowngardentooG.Foreachofthosegardenswriterdownthestrongestmemoryyouhave.
假定你是李华你校摄影俱乐部photographyclub将举办国际中学摄影展.请给你的英国朋友Peter写封信.请他提供作品.信的内容包括 1.主题环境保护 2.展览时间 3.投稿邮箱intlphotoshow@gmschool.com. 注意 1.词数100左右 2.可以适当增加细节以使行文连贯.
TheexperimenthasbeenfinishedbutnooneknowswhatgreatdifficultyIhad______it. A.making B.made C.tomake D.formaking
福酚美克是一种影响机体免疫力功能的药物可通过以下方法合成 1B中的含氧官能团有和填名称． 2C→D的转化属于反应填反应类型． 3已知E→F的转化属于取代反应则反应中另一产物的结构简式为． 4AC9H10O4的一种同分异构体X满足下列条件 Ⅰ．X分子有中4种不同化学环境的氢． Ⅱ．X能与FeCl3溶液发生显色反应． Ⅲ．1molX最多能与4molNaOH发生反应． 写出该同分异构体的结构简式． 5已知+R3CHO根据已有知识并结合相关信息写出以为原料制备的合成路线流程图无机试剂任用． 合成路线流程图示例如下 CH3CH2BrCH3CH2OHCH3COOCH2CH3．
一定温度下在三个体积均为2.0L的恒容密闭容器中发生如下反应PCl5g⇌PCl3g+Cl2g 下列说法正确的是
Sciencefictionsofthe1960sand1970spredictedthatpillswouldreplacemealsastheway_______peoplewouldgetthefueltheyneeded. A./ B.which C.How D.where
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