上海市牛津英語7A 單元練習(xí)(M1U1)及上海市閔行區(qū) 學(xué)年第一學(xué)期六校期中考試初三年級化學(xué)試卷

TestforUnit1RelativesinBeijing(7AM1)(本卷滿分100分，時間40分鐘)PartOneListening（第一部分聽力）(共13分)I.Listentothedialogueandchoosethebestanswertothequestionyouhear.（根據(jù)你聽到的對話和問句，選出最恰當(dāng)?shù)拇鸢?。）?分）()1.A.theSummerPalace B.theGreatWall C.thePalaceMuseum D.BeihaiPark()2.A.amother B.aclassmate C.ashopassistant D.ateacher()3.A.4

:45 B.4

:55 C.5

:05 D.5:15()4.A.Ontheplane B.Attheairport C.Inthesupermarket D.Ontheship()5.A.Todothehomework B.ToplaycomputergamesC.Tosendane-mail D.Tofindsomeinformation()6.A.4hours B.6hours C.8hours D.10hours()7.A.Playingvolleyball B.playingtheguitar C.talkingtoateacher D.Readingabook()8.A.Bybike B.Bybus C.Onfoot D.BycarII.()9.Touristscantakeaboattripinthemorning.()10.Thingsinlargedepartmentstoresarenotalwayscheap.()11.Therearesomesmallshopsnearthetrainstation.()12.ThereisalotofspecialfoodinGuangzhou.()13.PeoplecanenjoyeatingcheapandtastyfoodinGuangzhou.Part2VocabularyandGrammar（第二部份詞匯與語法）（共34分）I.Choosethebestanswer.(選擇最恰當(dāng)?shù)拇鸢浮?（10分）()14.Tian’anmenSquareisin______centreofBeijing.Itis_____openarea. A.the,the B./,an C.the,an D.a,the()15.ThePalaceMuseumisaninterestingplace_____manyancientbuildings.I’dliketovisitit. A.with B.has C.for D.of()16.Myplanewillarriveattheairport______themorningofMay15th.A.in B.at C.on D.for()17.Beijing,thecapitalofChina,isoneof______citiesintheworld.A.big B.muchbigger C.biggest D.thebiggest()18.Youcanseethechildren______happilyonthePeopleSquare. A.play B.playing C.areplaying D.toplay()19.Thankyoufor_____mewiththehousework. A.helping B.help C.helps D.helped()20.Ittookmemorethantwohours______myhomeworkyesterday.A.finish B.willfinish C.finished D.tofinish()21.----______didtheticketforthebookshowcost?----Fiftyyuaneach.A.Howlong B.Howmuch C.Howmany D.Howoften()22.----HowareyougoingtoBeijing?----I’mgoingto______aplane.It’sfasterthanatrain. A.by B.on C.take D.have()23.----IwilltakeatriptoLondonnextweek.----_______ A.I’sorrytohearthat. B.Why? C.Haveagoodtime! D.You’rewelcome.II.Completethesentenceswiththegivenwordsintheirproperforms.(用所給單詞的適當(dāng)形式填空。)（7分）24.Igotan_____________frommyfriendyesterday.(invite)25.Thisyear,more___________willgotoShanghaifortraveling.(tour)26.Wevisitedalotof___________placesinShanghai.(interest)27.Peopleliketogotravelingbytrainbecauseit’s_____________andmoreexciting.(cheap)28.Thesunandbeachcanmakea_____________holiday.(wonder)29.TheQingmingFestivalhasalreadybecomea______________holidayinChina.(nation)30.Tonywouldliketobeatravel______________whenhegrowsup.(agency)III.Fillintheblankswiththeproperformsofthegivenverbs.（時態(tài)填空）（5分）31.We(notvisit)theGreatWallbefore.32.There(be)aconcert(音樂會)atthebeachthisevening.33.Tim(justsee)thefilm“TinyTime”(小時代).34.It(cost)metwohundredyuantobuymyfavouritebooksyesterday.35.yourfriendalways(spend)hoursplayinggames?IV.Rewritethesentencesasrequired.(按要求改寫句子，每空格限填一詞。)（共12分）36.Thecomputerbookcostme10yuan.(改為否定句)Thecomputerbook__________________________me10yuan.37.He’salreadyseenhisgrandparents.(改為一般疑問句)_____________heseenhisgrandparents_____________?38.Iweigh50kg.Mysisterweighs52kg.(保持句意不變)Mysisteris__________________________I.39.MytriptoXiamenwassowonderful.(劃線提問)__________________________yourtriptoXiamen?40.Mrs.Greenhaslivedinthissmallvillageforabouttwentyyears.(對劃線部分提問)__________________________hasMrs.Greenlivedinthissmallvillage?41.Iseehimeverymorning.Heiswateringflowersinhisgarden.(兩句并一句)Isee__________________________flowersinhisgardeneverymorning.Part3ReadingandWriting（第三部分閱讀和寫話）（共53分）I.ReadingComprehension(閱讀理解)（共38分）A.Choosethebestanswer.(閱讀短文，選擇最恰當(dāng)?shù)拇鸢浮?（10分）I’vejustgothomeafterathree-holidayinNewYorkwithmyfamily.ItwasreallygreatandIwanttoremembereverything,soI’mputtingitallinthisdiary(日記).Day1Wearrivedattheairportandtookayellowcabtoourhotel.Itwasexpensivebutitwasfast,andthedriveinthecabwasveryfriendly.Everythingtherewasamazing(有趣的)!PeoplecallNewYork“Thecitythatneversleeps”.Anotherpopularnameforitis“TheBigApple”.Don’taskmewhy!Thepopulation(人口)isover8,270and46millionpeoplevisitNewYorkeveryyear!Day2FirstwewenttotheEmpireStateBuilding,whichis381metreshigh.WewentuptothetopandlookedoutacrossNewYork.Ithadafantastic(令人驚訝的)view!AfterthatIhadthebiggesthamburgerIhavenevereaten!Afterlunchwewentshopping.Althoughitisabigcity,youwon’tgetlosteasilybecausemostofthestreetshavenumbers.Forexample,ifyou’reattheThirty-fourthStreet,it’seasytofindtheThirty-ninthStreetDay3----thelastdayIt’sSaturday.CentralParkistheplacetogoatweekends.It’sfullofpeoplewalking,playing,joggingandskating.Therearemusicians,artistsandtouristslikeme.There’sagreatzoointheparkwithlotsofinterestinganimals.Intheeveningwewenttothecinema.TheAmericanscallita“movietheatre”.()42.ThewriterstayedinNewYork____________. A.forthreeweeks B.foraweek C.forthreedays D.fortwodays()43.Thewritervisited___________onthesecondday. A.theairport B.thesleeplesscity C.CentralPark D.theEmpireStateBuilding()44.It’snoteasytolosethewayinNewYorkbecause_____________. A.touristscanseetheviewofthecity B.mostofthestreetshavenumbers C.everythinginNewYorkisbig D.it’sfullofpeopleinthecity()45.Theunderlinedword“cab”inParagraph2means“______________”. A.bus B.taxi C.train D.plane()46.WhichofthefollowingisNOTtrueaccordingtothepassage? A.TouristscangotoCentralParkonlyatweekends.B.YoucanfindalotoftouristsinCentralPark. C.There’sazoowithinterestinganimalsinCentralPark.D.Cinemasarecalled“movietheatre”intheUSA.B.Readthepassageandanswerthefollowingquestions.(閱讀短文，完整回答下面問題。)（10分）TodayisMayDay.Itwasafineday.AllmyfamilywenttotheGreatWall.Wegotonthebusat8o’clockinthemorning.Thebuswasverybig.Therewerealotofpeopleinit:menandwomen,oldandyoung.Theywerefromdifferentplacesandcountries.Andtheyspokedifferentlanguages:Chinese,English,Frenchandsoon.Althoughtheirlanguagesaredifferent,theysmiledtoeachotherinafriendlymanner.Allthepeopleonthebuslookedveryhappy.AllofthemwantedtohavewonderfultimeontheGreatWall.“Goodmorning,ladiesandgentlemen!HappyMayDay!”TheguidebeganherexplanationabouttheGreatWalltothetourists.Wow!HerEnglishwasverygood.ShetalkedaboutthehistoryoftheGreatWall.Shesaid,“Thereisanoldsaying:‘HewhohasneverbeentotheGreatWallisnotatrueman.’”Allthetouristswantedtoseeitverymuch.47.Whendidthewriter’sfamilygototheGreatWall?48.HowdidthefamilygototheGreatWall?49.AreallthetouristsChinese?50.Howdidallthepeoplelookonthebus?51.Whatlanguage(語言)didtheguidespeak?C.Choosethewordsorexpressionsandcompletethepassage.（選擇最恰當(dāng)?shù)膯卧~或短語,完成短文。）（共6分）Mr.Joneswenttotheseaforaholidayonesummerandhestayedinacheaphotel52hewasnotarichman.At7o’clockonthefirstmorning,awomancameinandsaid,“Pleasegetup.”Mr.Jones53gettingupearly,sohesaid,“Idon’twanttogetupyet.I’mstillverytired.”Thewomanwentaway,butat8o’clock,54onecameandsaidtoMr.Jones,“Mr.Jones.Pleasegetup.Weneedthesheets(床單)fromyourbed.”Mr.Jonesstillwantedtosleep,soheanswered55,“Why?”“Because56isstarting,”answeredthewoman,“andweneedtoputthemonour57.Theyareourtable-cloth,too.”()52.A.because B.and C.when D.if()53.A.liked B.enjoyed C.hated D.made()54.A.same B.different C.another D.some()55.A.happily B.angrily C.hungrily D.luckily()56.A.dinner B.lunch C.supper D.breakfast()57.A.chairs B.tables C.cupboards D.shelvesD.Readthepassageandfillintheblankswithproperwords.(在短文的空格內(nèi)填入適當(dāng)詞,使其內(nèi)容通順,每空格限填一詞,首字母已給。)(12分)DearKitty,How’severythinggoingonwithyou?MayDayiscoming.Wearemakingplansfortravelling.We’llgoonatriptoHainanforourholidays.It’sagoodplacetos58holidays.Myauntlivesthere.Ihopetotravelwithher.Myparentsworkh59tomakemoneyforthisholiday.Istudyhardtomakemyparentshappy.IhearSanyaisab60cityinHainan.It’shotaroundMay.Ifyougothere,youcanseeflowerseverywhere.Girlscanwearskirtsthere.Youcanseetheseathereands61inthesea.I’lltakeacameraandtakealotofp62.Wealsowanttovisitsomeo63Whataboutyourholidayplan?Pleasewritetomesoon.Yours,Alice58.59.60.61.62.63.II.Writing(寫作)（15分）A.連詞成句（6分）64.hisparty,invited,to,thisweekend,has,theLis,Jack65.haven’t,they,about,theinterestingplaces,anyinformation,found,inBeijing,yet66.visit,wanttoknow,you,ShanghaiMuseum,if,thehistoryofShanghai,can,you67.thetrain,theplane,is,than,faster68.see,you,thechildren,intheplayground,can,playinggames69.byplane,toGardenCity,it,does,Howlong,fromBeijing,take,totravelB.段落或短文（9分）70.Writeabout60wordsonthetopic“Myfavouritecity”,usingthefollowingquestionsbelowforreference.1.Whichisyourfavouritecity?2.Whydoyoulikeit?3.Whatcanwedointhecity?________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________▲60▲60________________________________________________________________________(words)KeytoTestforUnit1RelativesinBeijing(7AM1):I.Listentothedialogueandchoosethebestanswertothequestionyouhear.1.A:NationalDayiscoming.WouldyouliketovisittheSummerPalaceorthePalaceMuseuminBeijing?B:WhataboutthePalaceMuseum?A:Great!Q:Whichplacearetheygoingto?(C)2.M:I’sorryI’mlate.W:Youarealwayscominglate.Youmustn’tbelateforclassanymore.Q:Whoisthewoman?(D)3.M:Whattimeisitnow?W:Letmesee.Oh,it’saquartertofive.M:Thetrainwillleaveintenminutes.Let’shurry.Q:Whattimewillthetrainleave?(B)4.M:Howfunny!Thehouses,carsandotherthingsaresosmallandliketoys.W:Isthisthefirsttimeyouhavetraveledbyair?M:Yes.Q:Wheredoesthedialoguetakeplace?(A)5.M:MayIuseyourcomputer?W:Sure.Willyouplaycomputergames?M:No.I’llsendane-mailtomyfriend.Q:Whatwilltheboyusethecomputertodo?(C)6.W:Wheredoyouwork?M:Iworkasabakerinabakery.W:Howlongdoyouworkeveryday?M:From10a.m.to4p.m.Q:Howmanyhoursdoestheboyworkeveryday?(B)7.M:IstheboyplayingvolleyballTed?W:No.it’sJim.M:IsTedplayingtheguitaroverthere?W:No,heisn’t.Look,heistalkingtohisteacher.Q:WhatisJimdoing?(A)8.W:What’sthematterwithyou,Tom?M:I’mgoingtoDan’sparty.Butmybikecan’tmovenow.Andthere’snobushere.W:Don’tworry.GetintomycarandI’lldriveyouthere.M:That’sverykindofyou.Q:HowwillTomgotoDan’sparty?(D)II.Guangzhouisawonderfulplace.Youcantakeawalkaroundthebiglakeandenjoythefreshair.Intheeveningyoucantakeaboattripandenjoythebeautifullightsofthecity.Touristsenjoyshoppinginthoselargedepartmentstoresbecausethethingsarequitecheap.Youwillalsofindsomesmallshopsnearthetrainstation.Youcanbuyoldthingslikecoins,stampsandvasesfromtheshops.PeopleinGuangzhouloveeating.Youcantryalotofspecialfoodattherestaurants.Atnight,youwillseemanyfoodstallsinthestreets.Touristsenjoyeatingattheseplacesbecausethefoodischeapandtasty.FFTTTPart2VocabularyandGrammar（第二部份詞匯與語法）（共34分）I.Choosethebestanswer.(選擇最恰當(dāng)?shù)拇鸢浮?（10分）14.C15.A16.C17.D18.B19.A20.D21.B22.C23.CII.Completethesentenceswiththegivenwordsintheirproperforms.(用所給單詞的適當(dāng)形式填空。)24.invitation25.tourists26.interesting27.cheaper28.wonderful29.national30.agentIII.Fillintheblankswiththeproperformsofthegivenverbs.（時態(tài)填空）（5分）31.haven’tvisited32.willbe/isgoingtobe33.hasjustseen34.cost35.does,spendIV.Rewritethesentencesasrequired.(按要求改寫句子，每空格限填一詞。)（共12分）36.didn’t,cost37.Has,yet38.heavier,than39.How,was40.Howlong41.him,wateringPart3ReadingandWriting（第三部分閱讀和寫話）（共53分）I.ReadingComprehension(閱讀理解)（共38分）A.Choosethebestanswer.(閱讀短文，選擇最恰當(dāng)?shù)拇鸢浮?（10分）42.C43.D44.B45.B46.AB.Readthepassageandanswerthefollowingquestions.(閱讀短文，完整回答下面問題。)（10分）47.OnMayDay.48.Theywenttherebybus.49.No,theyaren’t.50.Theylookedveryhappy.51.ShespokeEnglish.C.Choosethewordsorexpressionsandcompletethepassage.（選擇最恰當(dāng)?shù)膯卧~或短語,完成短文。）（共6分）52.A.53.C54.C55.B56.D57.BD.Readthepassageandfillintheblankswithproperwords.(在短文的空格內(nèi)填入適當(dāng)詞,使其內(nèi)容通順,每空格限填一詞,首字母已給。)(12分)58.spend59.hard60.beautiful61.swim62.photos63.otherII.Writing(寫作)（15分）A.連詞成句（6分）64.JackhasinvitedtheListohispartythisweekend.65.Theyhaven’tfoundanyinformationabouttheinterestingplacesinBeijingyet.66.IfyouwanttoknowthehistoryofShanghai,youcanvisitShanghaiMuseum.67.Theplaneisfasterthanthetrain.68.Canyouseethechildrenplayinggamesintheplayground?69.HowlongdoesittaketotravelfromBeijingtoGardenCitybyplane?學(xué)年上海市閔行區(qū)第一學(xué)期六校期中考試初三年級化學(xué)試卷（滿分100分，考試時間90分鐘）題號一二三總分得分得分評卷相對原子質(zhì)量：H-得分評卷一、單項選擇題（每小題只有一個正確選項，共25分）1．下列生活中經(jīng)常發(fā)生的變化，其中屬于化學(xué)變化的是（）A．自制冰塊B．燃放煙花C．車胎爆炸D．葡萄榨汁2．下列物質(zhì)中，屬于純凈物的是（）A．液態(tài)氧氣B．潔凈的空氣C．澄清的石灰水D．食鹽水3．下列元素符號和名稱都正確的是（）A．納—NaB．氯—CLC．氖—NeD．溴—Ba4．在某化妝品中檢測出“釹”超標(biāo)，它對眼睛和粘膜有很強的刺激性，對皮膚有中度刺激性，吸入還可導(dǎo)致肺栓塞和肝損害。這里的“釹”指的是（）A．單質(zhì)B．分子C．原子D．元素5．氧化鐵的化學(xué)式是（）A．FeOB．Fe2O3C．Fe3O4D．FeCl6．重鉻酸鉀可以檢測司機(jī)是否酒后駕車，因為酒精中的乙醇分子可以使紅色的重鉻酸鉀變?yōu)榫G色的硫酸鉻[Cr2(SO4)3]。硫酸鉻中鉻元素化合價為（）A．+3B．+5C．+6D．+47．下圖所示實驗基本操作正確的是（）氫氧化鈉（具有腐蝕性）氫氧化鈉（具有腐蝕性） A B C D空氣是一種非常寶貴的資源，其中體積分?jǐn)?shù)約占4/5的氣體是（）A．二氧化碳B．氧氣C．氮氣D．水蒸氣9．下列屬于物質(zhì)的化學(xué)性質(zhì)的是（）A．溶解性B．助燃性C．顏色D．熔點10．發(fā)射通訊衛(wèi)星的火箭燃料燃燒時發(fā)生的反應(yīng)是2N2H4+N2O4→3X+4H2O，X的化學(xué)式是（）A．N2OB．N4C．NH3D．N11．關(guān)于氧氣，下列敘述不正確的是（）A．氧氣能提供動植物呼吸B．氧氣具有可燃性C．氧氣能支持燃燒D．過度吸氧不利于健康12．下列屬于氧化物的是（）A．NOB．O2C．Ca(OH)2D．C2H613．下列反應(yīng)屬于分解反應(yīng)的是（）A．H2+CuOCu+H2OB．Fe+CuSO4→Cu+FeSO4通電C．C+CO22COD．2H2O2H2↑+O2↑通電14．在蒸發(fā)操作中不會使用到的儀器是（）A．酒精燈B．玻璃棒C．石棉網(wǎng)D．鐵架臺15．“南國湯溝酒，開壇十里香”，這廣告詞說明了（）A．分子是由原子構(gòu)成的B．分子間是有間隙的C．原子是化學(xué)變化中的最小微粒D．分子是不斷運動的16．下列變化中，氧元素由化合態(tài)變成游離態(tài)的是（）A．鎂帶燃燒B．氯酸鉀與二氧化錳共熱分解C．食鹽水蒸發(fā)D．鐵絲燃燒17．下列微粒中，能夠保持氧氣化學(xué)性質(zhì)的是（）A．OB．2OC．O2D．H2O218．下列關(guān)于微粒，說法正確的是（）A．原子是最小微粒B．原子是構(gòu)成分子的微粒，也是構(gòu)成物質(zhì)的一種微粒C．分子比原子大D．只要溫度相同，任何物質(zhì)的微粒間距都是相同的19．山梨酸是國際糧農(nóng)組織和衛(wèi)生組織推薦的高效安全的防腐保鮮劑，廣泛應(yīng)用于各種行業(yè)。山梨酸的化學(xué)式為C6H8O2，下列說法不正確的是（）A．山梨酸的一個分子由6個碳原子，8個氫原子，2個氧原子構(gòu)成B．山梨酸由碳、氫、氧三種元素組成C．山梨酸中碳、氫、氧三種元素的質(zhì)量之比為6∶8∶2D．山梨酸屬于化合物20．下列關(guān)于物質(zhì)的量的說法錯誤的是（）A．每摩爾任何物質(zhì)都含有6.02×1023個微粒B．摩爾是物質(zhì)的量的單位C．物質(zhì)的量是七個國際單位制基本量之一D．物質(zhì)的量是聯(lián)接宏觀物質(zhì)和微觀世界的橋梁21．2mol二氧化碳分子中所含原子總數(shù)是（）A．3molB．4molC．5molD．6mol下列說法正確的是（）A．單質(zhì)是純凈物，化合物是混合物B．只含有一種元素的物質(zhì)是單質(zhì)，由不同種元素組成的物質(zhì)是化合物C．單質(zhì)由同種元素組成，化合物由不同種元素組成D．化合物可以通過物理方法分離成單質(zhì)23．下列說法錯誤的是（）A．實驗室用氯酸鉀和二氧化錳共熱制氧氣，二氧化錳在固體混合物中質(zhì)量分?jǐn)?shù)變大B．由同一種分子構(gòu)成的物質(zhì)一定是純凈物C．氧化反應(yīng)未必是化合反應(yīng)，而化合反應(yīng)必定是氧化反應(yīng)D．鎂帶在空氣中充分燃燒后，生成物的質(zhì)量一定比鎂帶的質(zhì)量大24．將一定質(zhì)量木炭跟過量氧氣放在密閉的容器里加熱，充分反應(yīng)。下圖能正確反映容器內(nèi)有關(guān)物質(zhì)的質(zhì)量隨時間變化而變化的關(guān)系圖像是()氧氣的質(zhì)量氧氣的質(zhì)量/g木炭的質(zhì)量/g二氧化碳質(zhì)量/g物質(zhì)總質(zhì)量/g25．把A、B、C、D四種物質(zhì)放在密閉容器中，在一定條件下充分反應(yīng)，并測得反應(yīng)物和生成物在反應(yīng)前后各物質(zhì)的質(zhì)量如下表所示：物質(zhì)ABCD反應(yīng)前質(zhì)量（g）19.78.721.60.4反應(yīng)后質(zhì)量（g）?17.403.6下列說法正確的是（）A．物質(zhì)C一定是化合物，物質(zhì)D可能是單質(zhì)B．反應(yīng)后密閉容器中A的質(zhì)量為19.7gC．反應(yīng)過程中，物質(zhì)B和物質(zhì)D變化的質(zhì)量比為87∶36D．若物質(zhì)A與物質(zhì)C的相對分子質(zhì)量之比為194∶216，則反應(yīng)中A和C的物質(zhì)的量之比為1∶3二、填空題（共42分）26．化學(xué)語言是學(xué)習(xí)化學(xué)的基礎(chǔ)，請按照要求完成下列各題：根據(jù)要求寫出相應(yīng)的化學(xué)符號，或表示出化學(xué)符號的意義：銅_____，②氧化鈉_______，③2NO2_______________，④2個氫原子_______，⑤______________，⑥CO3_______________，⑦硝酸銨中-3價的氮元素__________。用化學(xué)式或元素符號表示：人體中最多的元素__________，②地殼中最多的金屬元素_________；③能代替氫氣填充飛艇的稀有氣體_______，④會造成酸雨的氣體______；完成下列化學(xué)方程式，并回答相關(guān)的問題：鐵絲燃燒_______________________________________________；上述反應(yīng)中，可以觀察到現(xiàn)象是___________________________________________；為了在反應(yīng)中防止儀器的損壞，要采取的措施是______________________________。過氧化氫溶液和二氧化錳制取氧氣_______________________________________；上述反應(yīng)中，生成物的物質(zhì)的量之比為________________。工業(yè)上，主要通過______________的方法來獲得氧氣，屬于_________變化。實驗室中，量取一定量的水時，需要用到的儀器是________和__________；將水倒入燒杯中，隨后將塊狀的生石灰用________（填儀器名稱）加入盛有水的燒杯中，此時，會發(fā)生的現(xiàn)象是___________；靜止片刻，取上層清液于試管中，通入二氧化碳，出現(xiàn)渾濁的現(xiàn)象。說明清液中含有的物質(zhì)的化學(xué)式是___________。粗鹽提純過程中，有下列操作：①過濾②溶解③蒸發(fā)④稱量⑤再稱量過濾操作是為了分離_______和__________；蒸發(fā)操作中必須要用到的一個非玻璃儀器是__________。粗鹽提純的正確的先后操作順序應(yīng)該是________________，在以上操作中，需要用到玻璃棒的是________________(本題均填序號)。若粗鹽的質(zhì)量為5.0克，精鹽的質(zhì)量為4.6克，則該粗鹽含有精鹽的產(chǎn)率是________，所得到的精鹽屬于________________(填“純凈物”或“混合物”)。下面的示意圖形象的表示某化學(xué)反應(yīng)前后分子的變化，其中表示硫原子，表示氧原子。該反應(yīng)的化學(xué)方程式為_____________________________；該示意圖說明了化學(xué)變化的實質(zhì)是_____________________________________。鑒于石油的儲量有限，且汽油機(jī)和柴油機(jī)燃燒排放的尾氣都嚴(yán)重污染大氣，科學(xué)家正努力嘗試采用甲醇[CH3OH]來代替部分汽油。請問：甲醇的摩爾質(zhì)量為_________________，其中各元素的物質(zhì)的量之比為____________，1mol該物質(zhì)含氫原子_____________個。該物質(zhì)碳元素和氫元素的質(zhì)量之比為_______。氧元素的質(zhì)量分?jǐn)?shù)為_____。該物質(zhì)在空氣中完全燃燒可以生成二氧化碳和水。若3.2克甲醇完全燃燒則釋放二氧化碳多少mol？（提示：根據(jù)化學(xué)方程式計算寫出計算過程）三、簡答題（共33分）某課外活動小組的同學(xué)用下列裝置探究氧氣的實驗室制法。aa寫出圖中標(biāo)號的儀器名稱：a________________；b_________________。寫出實驗室用B裝置制取氧氣的化學(xué)方程式__________________________。該小組同學(xué)用B裝置操作順序：①裝藥品。如果沒有說明用量時，固體藥品取量應(yīng)__________________。②連接儀器，固定試管。連接裝置的順序是__________________________________；試管口略向下傾斜的原因是_____________________________________________。加熱。加熱時應(yīng)先_________________________________。收集氣體。若要得到干燥的氧氣，則選擇的收集裝置為_________（填編號），用該裝置收集后，可以采取__________________________來證明氧氣已經(jīng)收集滿了。若要得到純凈的氧氣，則選擇的收集裝置是______________（填編號）。實驗分析：請幫助她找出上述實驗過程中漏掉的一個實驗步驟___________________。（4）通過查閱資料可知，加熱固體碳酸氫銨[NH4HCO3]或加熱固體碳酸氫鈉[NaHCO3]都能得到二氧化碳?xì)怏w，其化學(xué)方程式分別是：NH4HCO3NH3↑＋H2O＋CO2↑2NaHCO3Na2CO3＋H2O＋CO2↑某同學(xué)利用加熱碳酸氫鈉的方法制取CO2，應(yīng)該選用的發(fā)生裝置是________（填編號）。他不選用碳酸氫銨制取CO2的理由是_________________