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小科开展了二氧化碳的制取和部分性质实验： （1）收集二氧化碳应选择图中 装置． （2）小科采用图E方法检验二氧化碳的性质，观察到蜡烛熄灭．该现象除了能说明二氧化碳不能燃烧外，还能说明二氧化...
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按下图的装置制取二氧化碳并检验它的性质完成下列问题1用装置A.来制取二氧化碳所用药品为_______
下图是实验室制取二氧化碳的装置Ⅰ请你用所学化学知识回答下列问题1图中仪器①的名称是仪器②的名称是2实
实验室里制取二氧化碳气体有下列仪器可供选用请你回答下列问题1制取二氧化碳气体所需的药品是______
归纳与比较是化学学习的重要方法下列对氧气和二氧化碳的异同点比较错误的是
组成：氧气只由氧元素组成，二氧化碳由碳氧两种元素组成
性质：氧气能使带火星的木条复燃，二氧化碳能使燃着的木条熄灭
制备：实验室中制取氧气和二氧化碳的发生装置和收集装置一定相同
用途：氧气主要用于供给呼吸、支持燃烧等，二氧化碳用于人工降雨、灭火等
下图是实验室制取二氧化碳的装置Ⅰ请你用所学化学知识回答下列问题1图中仪器①的名称是仪器②的名称是2实
实验室里制取二氧化碳气体有下列仪器可供选用请你回答下列问题1制取二氧化碳气体所需的药品是2收集二氧化
有下列关于实验室制取二氧化碳的说法中不正确的是
一般不选用碳酸钠与盐酸反应，因为二者反应速率太快
不能用排水法收集二氧化碳是因为二氧化碳能溶于水
能选用块状石灰石与稀硫酸做原料
实验室制取二氧化碳和可以利用双氧水制取氧气的发生装置
不用排水法收集二氧化碳而用瓶口向上排空气法收集二氧化碳原因是
二氧化碳能溶于水，二氧化碳密度比空气大
二氧化碳密度比空气大
二氧化碳能溶于水，密度比空气小
二氧化碳密度比氧气小
实验室制取二氧化碳气体有如下图所示的仪器可供选用请你回答下列问题1制取二氧化碳气体所需的药品是2收集
阅读下列材料按要求完成任务材料一义务教育化学课程标准2011年版的内容标准初步学习在实验室制取二氧化
在一次化学课上老师提供了以下装置制取二氧化碳并验证其性质请回答1仪器a的名称是__________2
实验室制取二氧化碳气体有如下图所示的仪器可供选用请你回答下列问题1制取二氧化碳气体所需的药品是2收集
实验室里制取二氧化碳气体有下列仪器可供选用请你回答下列问题1制取二氧化碳气体所需的药品是2收集二氧化
化学是一门以实验为基础的科学实验是学习化学的一条重要途径下面我们就实验室制取二氧化碳的收集问题做如下
实验操作考试中为了制取氧气和二氧化碳实验室提供了以下药品和仪器装置请回答下列问题①石灰石②稀硫酸③二
实验室部分仪器或装置如下图所示请回答下列问题1实验室常用石灰石和稀盐酸制取二氧化碳气体发生装置可选择
化学是一门以实验为基础的科学实验是学习化学的一条重要途径下面我们就实验室制取二氧化碳的收集问题做如下
按下图的装置制取二氧化碳并检验它的性质完成下列问题1用装置A.来制取二氧化碳所用药品为_______
化学是一门以实验为基础的科学实验是学习化学的一条重要途径.下面我们就实验室制取二氧化碳的收集问题做如
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30分TheculturesoftheEastandtheWestreallydistinguishfromeachotheralot.Thisisbecausetheculturesystemsaretwoseparatesystems21. TheoriginoftheeasternculturesismainlyfromtwocountriesChinaandIndia.Bothofthetwoculturesaregestated孕育by22.InChinathemotherriveristheYellowRiver23theIndianoneistheHinduRiver.Thesetwocultureswere24forseveralthousandyearsandformedtheirownstylesThenintheTangDynastyofChinatheChineseculture25wentoverseastoJapan26intotheJapanesesocietyand27theJapaneseculturenowadays.ThoughabitdifferentfromtheChineseoneit28tothesamesystem. Whenthetwomotherriversgavebirthtotheeasterncultureanotherfamousculturewas29ontheMesopotamianPlain美索不达米亚平原﹣theMesopotamianCivilization.ThiscivilizationlaterondevelopedintotheculturesofAncientGreeceandAncientRome.Andthesetwoarewell﹣knownasthe30oftheEuropeanculture.31theChineseculturetheEuropeanonealso32waters.WhenthecolonistsofEngland33inAmericatheirculturewentwiththemovertheAtlanticOcean.SotheAmericanculturedoesn't34fromtheEuropeanonealot. Atthesametimethe35ofthelanguagesystemsaddstotheculturaldifferences.IntheEastmostlanguagesbelongtothepictographic象形文字的languagewhiletheWesternlanguagesare36basedontheLatinsystemforexampletheoneI'musingtowritethispaper. Otherfactorslikehumanracedifference37countsaswell.However38thefardistanceandthesteepareasbetweentheEastandWestthetwoculturesseldom39untilrecentcenturies.40theygrewuptotallyintheirownwayswithalmostno﹣interference干扰fromtheother. 21.A.inall B.aboveall C.innocase D.onthewhole 22.A.rivers B.lakes C.mountains D.plains 23.A.or B.for C.while D.when 24.A.improved B.developed C.created D.protected 25.A.gradually B.naturally C.suddenly D.quietly 26.A.changed B.mixed C.decided D.forced 27.A.expanded B.interrupted C.shaped D.influenced 28.A.comes B.belongs C.amounts D.adds 29.A.carriedout B.givenout C.broughtup D.pickedup 30.A.base B.sign C.result D.content 31.A.With B.Like C.Via D.Except 32.A.crossed B.formed C.affected D.spread 33.A.wentup B.joinedup C.settleddown D.brokedown 34.A.differ B.suffer C.result D.come 35.A.feature B.development C.appearance D.distinction 36.A.simply B.mostly C.properly D.partly 37.A.count B.reduce C.last D.change 38.A.internsof B.incaseof C.dueto D.asto 39.A.communicate B.distinguish C.transform D.display 40.A.However B.Furthermore C.Meanwhile D.Therefore
把少量的下列物质分别放入水中充分搅拌可以得到溶液的是
8分FoodpickedupjustafewsecondsafterbeingdroppedislesslikelytocontainbacteriathanifitisleftforlongerperiodsoftimeaccordingtothefindingsofresearchcarriedoutatAstonUniversity'sSchoolofLifeandHealthSciences.Thefindingssuggesttheremaybesomescientificbasisofthe5﹣secondrule﹣thebeliefaboutitbeingfinetoeatfoodthathasonlyhadcontactwiththefloorforfivesecondsorless.Althoughpeoplehavelongfollowedthe‘5﹣secondrule'untilnowitwasunclearwhetheritactuallyhelped. ThestudyundertakenbyfinalyearBiologystudentsandledbyAnthonyHiltonProfessorofMicrobiologyatAstonUniversitymonitoredthetransferofthecommonbacteriafromavarietyofindoorfloortypesascarpetcementfloortotoastpastabiscuitandastickysweetwhencontactwasmadefrom3to30seconds.Theresultsshowedthattimeisasignificantfactorinthetransferofbacteriafromafloorsurfacetoapieceoffoodandthetypeofflooringthefoodhasbeendroppedonhasaneffectwithbacterialeastlikelytotransferfromcarpetedsurfacesandmostlikelytotransferfromcementflooringsurfacestomoistfoodsmakingcontactformorethan5seconds.ProfessorHiltonsaidConsumingfooddroppedonthefloorstillcarriesaninfectionriskasitverymuchdependsonwhichbacteriaarepresentontheflooratthetime. TheAstonteamalsocarriedoutasurveyofthenumberofpeoplewhoemploythe‘five﹣secondrule'.Thesurveyshowedthat87%ofthepeoplesurveyedsaidtheywouldeatfooddroppedonthefloororalreadyhavedoneso.55%ofthosethatwouldorhaveeatenfooddroppedonthefloorarewomen.81%ofthewomenwhowouldeatfoodfromthefloorwouldfollowthe‘5﹣secondrule'.ProfessorHiltonaddedOurstudyshowedthatasurprisinglylargemajorityofpeoplearehappytoconsumedroppedfoodwithwomenthemostlikelytodoso.Buttheyarealsomorelikelytofollowthe‘5﹣secondrulewhichourresearchhasshowntobemuchthananoldwives'tale. 12.Accordingtothepassagewhichofthefollowingistrue A.Atoastdroppedonthecarpetiseasiertobepollutedthanthatdroppedonthecementfloor. B.Astickychocolatedroppedonthecarpetiseasiertobepollutedthanthatdroppedonthecementfloor. C.Thefooddroppedonthecarpetsharesthesamepotentialofbeingpollutedwiththefooddroppedonthecementfloor. D.Thefooddroppedonthecementfloorisnotassafeasfooddroppedonthecarpetwithin30seconds. 13.Whatisthepassageprobablydeveloped A.Contrast B.Example C.Time D.Space 14.HowdidProfessorHiltonfeelafteranalyzinghowmanypeoplechosetoeatdroppedfood A.Puzzled B.Upset C.Satisfied D.Astonished 15.Whatisthemainideaofthispassage A.Thefoodwhichisdroppedonthefloorcanbeeatensafely. B.Aresearchonthesafetyoffooddroppedonthefloorisundertaken. C.Thebacteriahavenonegativeeffectonthesafetyoffood. D.Peoplesurveyedintheresearcharewillingtoaccepttheidea.
8分Itisbelievedthatthesuccessofhumansasaspeciesdependstoalargeextentonourabilitytocooperateingroups.Muchmoresothananyotheranimalpeopleareabletocoordinateandjointheirforcesandactionstoproducemutual共同的benefits. NewresearchinvolvingDrLucasMollemananexpertattheUniversityofNottinghamsuggeststhatsuccessfulcooperationingroupsdependsonhowpeoplegatherinformationabouttheirpeersandhowtheybasetheircooperativedecisionsonit. BiologistswonderhowcooperationcouldhavedevelopedbynaturalselectionItispuzzlinghowcooperationcanbebeneficialwhenitispossibletobehaveselfishlyandtakeadvantageofthecooperativeeffortsofyourgroup.Psychologistsandeconomiststryhardtounderstandwhymanypeoplearewillingtosacrificetheirownwelfaretobenefittheirsocialenvironment. DrMollemanfromthecenterforDecisionResearchandExperimentalEconomicssaidThequestionthatourresearchtriestoansweris‘Howdopeoplemakedecisionswhentheiractionscanaffectthewelfareofothers'Morespecificallywewanttoknowhowpeopledeterminetheirbehaviorwhentheyhavetocooperateingroups.Inthesesituationsabeneficialoutcomeforthewholegroupcanbeachievedifeveryonecooperates.Individuallyhoweverpeoplemightbebetteroffbymakingselfishchoices.Itispossiblethatpeoplepaycloseattentiontotheirfellowgroupmateswhentheymakedecisions.Forinstancetheycooperateifothersalsocooperatebutactselfishlywhenothersdonotcooperate. DrPieterVanDenBergfromtheUniversityofGroningensaidFrompreviousresearchweknowthatsomepeopleare‘majority﹣oriented以多数人为方向的'andtendtolookatthebehaviorofthemajorityintheirgroupwhereasothersare‘success﹣oriented'andtrytofindoutwhatkindofbehaviorpaysoffbestforthemselves. DrMollemansaidItturnsoutthatbehavioringroupsofsuccess﹣orientedpeoplewasmuchmoreselfishthanitingroupsofmajority﹣orientedpeople.Asaconsequencethepeopleinthemajority﹣orientedgroupstendedtoearnmoremoneyintheexperimentsincetheycooperatedmore. 28.Accordingtothepassagewhatisspecialabouthumanbeing A.Theyarelikelytocommunicatewellwithothers. B.Theyarecapableofworkingtogetherwithothers. C.Theyarestrongtosurvivesomenaturaldisasters. D.Theyareeasytogetaccesstovariousinformation. 29.Whatdoestheunderlinedworditinparagraph2referto A.Research. B.Cooperation. C.Information. D.Group. 30.TheauthorwritesParagraph4to. A.letusknowhowpeoplemakecooperativedecisions B.showustheimportanceofcooperativedecisions C.tellushowtomakeotherpeoplecooperateinagroup D.remindusoftheadvantagesofcooperatingwitheachother 31.Fromthepassagewecaninferthat. A.peoplearemoreconcernedaboutwhichgrouptheyaresupposedtoselect B.theeffortsofsuccess﹣orientedpeoplearemorelikelytopayoff C.peoplemakeawisedecisionbasedonobservingothers'behaviorscarefully D.peopleperformdifferentlywhentheymakedecisions.
10分Unlessyouthinkyou'rethesmartestwhodoesn'twanttobesmarterOfcourseIwanttobesmartertoo.SoItrytofindoutwho'stherealsmartguythatmaybeIcanlearnfrom.36 ▲Theyprobablydosocialmedia.Notalwaysbutprobably.37Theyalsousethistoensuretheycanfeedtheirbrainswiththingstheyotherwisewouldn'thavecomeacross. ▲38Theyneverbothertheirheadabouttheproblemofwork﹣lifebalanceandsomehowmanagetoseem100%engagedinwhatthey'redoingonallfrontssimultaneously同时eventhoughyouknowthey'retakingappropriatestepsbehindthescenestomakesuretheirlivesarewellbalanced. ▲Theyknowtheyarethesmartestintheroombuttheydon'tspendmuchtimetalkingaboutthat.39Thatistheychallengethemselvestomakeeveryoneelseintheroomthesmartestpersontoo. ▲Theynevereverunderanycircumstancesmakeyoulookstupideventhoughitwouldbeeasytodoso.They'velearntthroughbitterexperiencethattheonlythingthathappenswhenyoumakesomeonelookbadisthatyoulookbadyourself. ▲Iftheyaremanagerstheywillmakeeveryefforttogetpeoplemoreconnectedandmorepopularthanthemintheirteams.40They'renotthreatenedbecausetheyknowthatsmartnessissynergistic相互促进的. A.It'snotonlyachancetolisten. B.Theyknowitisanadvantagetothem. C.Theytakeitasapersonalchallengeinstead. D.Theywillbesmilingevenwhenthingsgowrong. E.NowI'vegotanansweraboutwhethersomeone'ssmart. F.Theyalsoensuretheirsmartpeoplelooksmarterthanthem. G.Theydealwithhomeworkandpersonalinterestsperfectly.
如图中A～H是教案备课库常见的物质．A俗称苏打C可用作补钙剂G是一种常见的氮肥含氮量为35%HF物质类别相同．图中“﹣”表示两端的物质间能发生化学反应“→”表示物质间存在转化关系反应条件部分反应物和生成物已略去． 1写出化学式AGD． 2写出H转化为B的反应化学方程式． 3若E与G的组成元素相同则E的名称为．
根据氯离子的结构示意图判断以下说法错误的是
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处错误每句中最多有两处.错误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∧并在此符号下面写出该加的词. 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. Todayismymum'sbirthday.ThisafternoonIwenttothebiggestshoppingcenterdowntownandbuyapresentforher.ThenItookthesubwayhome.SittingonthetrainIthoughtmymumwouldveryhappywhenshesawthepresent.Atthenextstationanoldmanthatcarriedtwoheavybagsgotonthetrainbutstoodinfrontofme.Helookedtired.Ihesitatedforthemomentandthenofferedmyseattoher.Theoldmanthankedmealotofandsatdown.SeeinghissmileIfelthappily. FromthisexperienceIwillbereadytohelpingothersinthefuture.
8分SheWalkedThroughFire OnThanksgivingweekendtheHeffelmirefamilygatheredforamealattheirhome.AfterdinnerthefamilywentdowntothefinishedbasementtorelaxexceptCharlotte'sfatherEricwhowasinthegaragetofixhistruck. Around8pmCharlottedecidedtocheckonherdad.Shewalkedthroughthekitchen.Whensheopenedthesidedoortothegarageblacksmokeroseupintothekitchen.Shecouldbarelymakeoutherfatherlyingonhisbacktrappedunderthetruck.He'dremovedthefrontpassenger﹣sidetyreandraisedthetruckonajack千斤顶.Thetruckhadslippedoffthejackandnowthewholeweightofthewheelwasonhischestandshoulders. Charlotterantothefrontofthetruckandstruggledtoliftit.EricwasstillconsciousandheyelledYougotit!Onemoretry!Shetriedagainandwasabletotipthetruckbackwardjustenoughforhertopullherdadbytheshirtwithbothhandsfromunderthetruck. Shedraggedhimacrossthegarageand20feetdownthedriveway.Thensheranbacktothegaragewhichhadburstintoflames.IwasafraidthecarwasgoingtoexplodesaysCharlottesosheclimbedintothetruckwhichfacedforwardturnedthekeyandpressedthegaspedal油门.Thecarslowlyrolledoutthemetalwheelscratchingloudlyagainsttheconcrete. SafelyonthedrivewayCharlottestoppedthetruckandranbacktothebasement.There'safire!Everybodygetout!sheyelledasshepickedupherthree﹣month﹣oldnieceandranout.Outsideshehandedthebabytohermomandthenranaroundtotheburninggarage.Shepickedupagardenhose水管andsprayedthefirewhilecalling911. Afewminuteslaterfirefightersandanambulancearrived.Charlottewastreatedforsecond﹣degreeburnsonbothherfeetandface.Herdadhadinjuriesonhischestandshouldersaswellasminorburnsonhisface.Thegarageandthehouseweredamagedbutthefamilysurvived. TheHeffelmiresarestayinginanapartmentwhiletheirhouseisrebuilt.Charlotteisaremarkablekidsaysherdad.CharlottehoweversimplysaysIwassavingmyfamilyandmyhouse.Iwasn'tgoingtoletmydaddie. 59.Ericgottrappedbecause. A.thekitchenwasonfire B.thewheelfelloffthetruck C.thefronttyrewasremoved D.thetruckslippedoffthejack 60.Whichofthefollowingisthecorrectorderoftheevents a.Charlottecalledthefirefighters. b.CharlottesavedEricfromunderthetruck. c.Charlottedrovethetruckoutofthegarage. d.Charlottewarnedthefamilytoleavethehouse. A.bcad B.abdc C.acbd D.bcda 61.Asaresultofthefire. A.thetruckexploded B.thehousewasnotfittolivein C.thethree﹣month﹣oldbabywasinjured D.Charlottewasburnedonherchestandshoulders 62.ItcanbeinferredfromthepassagethatCharlotteis. A.proudandclear﹣headed B.modestandeasy﹣going C.calmandquick﹣minded D.independentandself﹣centered.
10分 HowtoCreateaMindMap Mostofusthinkvisuallybutwewritetextually.36Italsomakestheinformationwelistmoredifficulttoprocessrememberandshare. 37Itcombinesthebrain'svisualnaturewithourtendencytowritedownwords.Weendupwithadiagramthatcombineslogicandorderinalessstructuredmanner.Thispromotesclearerthinkingandbettercomprehension.38 SohowdoyoucreateamindmapThemostbasicmethodistojustuseapenandpaperoramarkerandwhiteboard.Itbeginswithacentraltopicorideathenflowsoutward.39Thenextleveloftopicsisrepresentedbybranchesextendingfromit. Therearen'treallyanyrulesforcreatingmindmaps.Whilemostflowoutwardlyfromthecentraltopicsomeusersprefertobuildmindmapsinonedirection.40Thiscanmakegroupsofideaseasiertoidentifyandremember.Italsomakesamindmapmoreenjoyabletocreateanduse. Mindmapsareextremelyeffectivefortakingnotesplanningaprojectbrainstorminganideapresentinginformationtoothersandmanyotheruses.Takeoutyourpenandhaveatry. A.Theyhelptoclarifythinking B.Thisgoesagainsthowourmindsactuallywork C.Theyhelpussavetimebyfocusingonkeyissues D.Amindmapistheperfectanswertothisdilemma E.Thinkofitasatreewherethecentralpointisthetrunk F.It'salsoalotmoreenjoyablethansimplywritingdownlists G.Otherliketoaddcolorspicturesorsymbolsintheirmindmaps.
向硝酸银硝酸铜硝酸亚铁的混合溶液中加入一定质量的锌粉反应停止后过滤得滤渣A和滤液B．向滤渣A中加入稀盐酸有气泡冒出．则滤渣A中一定有滤液B中一定有的金属离子是一定没有的金属离子是．
下列实验操作正确的是
15分Therewasagardenerwholookedafterhisgardenwithgreatcare.Towaterhisflowersheusedtwobuckets.Onewasashinyandnewbucket.Theotherwasaveryoldandworn﹣outone61hadseenmanyyearsofservicebutwasnowpastitsbest. Everymorningthegardenerwouldfillupthetwobuckets.Thenhewouldcarrythemalongthepathoneon62sidetotheflowerbeds.Thenewbucketwasveryproudofitself.Itcouldcarryafullbucketofwater63asingledropspilled.Theoldbucketfeltvery64shamebecauseofitsholesbeforeitreachedtheflowerbedsmuchwater65escapefromtheholes. SometimesthenewbucketwouldsaySeehowcapableIam!Howgooditisthatthegardenerhasmetowatertheflowerseveryday!Idon'tknow66hestillbotherswithyou.Whatawasteofspaceyouare! AndallthattheoldbucketcouldsaywasIknowI'mnotveryusefulbutIcanonlydomybest.I'mhappythatthegardenerstillfindsalittlebitofuseinmeatleast. Onedaythegardenerheardthatkindofconversation.After67watertheflowersasusualhesaidYoubothhavedoneyourworkverywell.NowIamgoingtocarryyouback.Iwantyoutolook68carefulalongthepath. Thenthetwobucketsdidso.Allalongthepaththeynoticedonthesidewherethenewbucket69carrytherewasjustbareearthontheothersidewheretheoldbucketpassedtherewasa70joyrowofwildflowersleadingallthewaytothegarden.
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