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下列化学方程式或离子方程式书写不正确的是（ ）
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高三下学期化学《》真题及答案
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写出下列化学方程式或离子方程式1钠与氧气在常温下反应化学方程式___________________
按要求回答问题1完成下列化学方程式①将金属钠加入到硫酸铜溶液中的化学方程式②漂白粉失效的化学方程式③
按要求完成方程式1铜与热的浓硫酸反应的化学方程式2H2S不能被浓硫酸干燥的原因用化学方程式表示3分别
写出下列反应的离子方程式或化学方程式1BaOH2与H2SO4反应离子方程式2Fe与HCl反应离子方程
按要求写出下列反应的化学方程式或离子方程式1用氢氧化钠除去氧化镁中的氧化铝离子方程式________
下列说法中正确的是
书写热化学方程式时，只要在化学方程式的右端写上热量的符号和数值即可
凡是在加热或点燃条件下进行的反应都是吸热反应
表明反应所放出或吸收热量的化学方程式叫做热化学方程式
氢气在氧气中燃烧的热化学方程式是2H
2
(g)+O
2
(g)=2H
2
O(g) △H=-483.6kJ
在下列中学化学中常见物质的转化关系图中反应条件及部分反应物和产物未全部注明已知A.D.为金属单质其他
写出符合要求的化学方程式或离子方程式:1实验室用二氧化锰和浓盐酸制备氯气的离子方程式________
根据化学方程式的书写方法练习书写下列化学反应的化学方程式
下列说法正确的是
书写热化学方程式时，只要在化学方程式的右端写上热量的符号和数量即可
凡是在加热或点燃条件下进行的反应都是吸热反应
表明反应所放出或吸收热量的化学方程式叫做热化学方程式
氢气在氧气中燃烧的热化学方程式是：2H
2
(g)+O
2
(g)=2H
2
O △H＝-483.6 kJ·mol
－1
写出实现下列转化的化学方程式各举一例即可1有气体生成的化学方程式2有水生成的化学方程式3有沉淀生成的
在下列中学化学中常见物质的转化关系图中反应条件及部分反应物和产物未全部注明已知A.D.为金属单质其他
按要求完成方程式1少量的Na投入CuSO4溶液中反应的离子方程式2Na2O2用作呼吸面具的原理用化学
写出下列反应的离子方程式或化学方程式1BaOH2与H2SO4反应离子方程式2Fe与HCl反应离子方程
按要求写出下列化学反应的方程式1将铝片放入到NaOH溶液中离子方程式2用NaOH溶液吸收氯气化学方程
按要求书写下列化学方程式1用X.射线检查肠胃病时让病人服用的钡餐是硫酸钡的悬浊液不会引起钡离子中毒若
按要求书写方程式1高温下铝与氧化铁反应的化学方程式2惰性电极电解AgNO3溶液的离子方程式3工业制硝
为使书写的化学方程式遵守____________定律要在化学方程式两边的化学式的前面配上适当的___
按要求书写下列方程式1CaClO2的电离方程式___________________________
下列关于化学方程式的意义的叙述中不正确的是
化学方程式可以表明反应物．生成物和反应条件
化学方程式可以表明各反应物和各生成物之间的质量比
化学方程式可以表明各反应物和生成物之间的粒子（分子和原子）数目关系
化学方程式可以表明各种物理变化
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﹣Excusemecouldyoupleasehelpmedothedishes? ﹣. A.Noproblem B.YesIdo C.It'sagoodidea D.Notatall
TopicHowcanwehelptoprotecttheenvironment? Time800﹣930a.m.tomorrow PlaceIntheschoolhall TouchwithMissBrown.J.G@imooc.com. Whattotalkabout Ourearthisintrouble!Almosteverydaywehearaboutproblemsoftheenvironmentthunderstormhaze雾霾andClimatechange.Infacthumans人类broughttheseproblems.Weworryaboutthefutureoftheearth.Wemustfindwaystosolvetheseproblemsortheearthcan'tsupporthumanlife. Manypeoplevolunteertocleanupparksorplanttrees.Infacteachofusneedstodosomethingtoprotecttheenvironment.Butwhatcanwedo?ComeandlistentoMr.Green'sreporttomorrow. 1.Howlongwillthereportbe? A.Anhour. B.90minutes. C.Halfanhour. D.70minutes. 2.Whatisthereportabout? A.Problemsoftheenvironment. B.Humansbroughttheenvironmenproblems. C.Thewaystoprotecttheenvironment. D.Everyoneshouldworkasavolunteer. 3.TheunderlinedwordsupportmeansinChinese A.维持 B.破坏 C.安抚 D.降低 4.Whowillgivethespecialreport? A.MissBrown. B.Mr.Brown. C.MissGreen. D.Mr.Green. 5.Howmanyproblemsoftheenvironmentarementionedinthepassage? A.Two. B.Three. C.Four. D.Five.
Don'tworryaboutmeIamoldenoughtomyself. A.looklike B.lookfor C.lookup D.lookafter
Wehaven'tfoundanythingthatwecan'trecycle! Cigaretteendsareeverywhere﹣litteringourstreetsandbeaches﹣andfordecadesthey'vebeenthoughtofasunrecyclable.ButaNewJerseybasedcompanycalledTerraCyclehastakenonthechallengeandhascomeupwithawaytorecyclemillionsofcigaretteendsandturnthemintoindustrialplasticproducts.Itsaimistorecyclethingsthatpeoplenormallyconsiderimpossibletoreuse. Obviouslyitwouldbeevenbetterfortheenvironmentifeveryonejuststoppedsmokingbutthestatisticsshowthatalthoughtherehasbeenanincreaseinanti﹣smokingadsandmessagingbetween2000and2014globalsalesofcigarettesincreasedby8percentandawholelotofthosecigaretteendsareendingupasgarbage.Sincemostofourlitterfinallyendsupinwaterwayscigaretteendscansurelypollutethesurroundingenvironment.ItonlytakesasinglecigaretteendtopollutealiterofwaterTerraCyclefounderTomSzakysaid.Animalscanalsomistakelitteredcigaretteendsforfood. Sohowdoyougoaboutturningallthosepoisonousendsintosomethinguseful?TerraCycledoesthisbyfirstbreakingthemdownintoseparateparts.Theymixtheremainingmaterialssuchasthetobaccoandthepaperwithotherkindsofrubbishanduseitonnon﹣agriculturallandsuchasgolfcourses.Thefilters过滤嘴arealittleharder.TorecycletheseTerraCyclefirstmakesthemcleanandcutsthemintosmallpiecesandthencombinesthemwithotherrecycledmaterialsmakingthemintoliquidforindustrialplasticproducts. They'renowalsoexpandingtheirrecyclingofferingstotherestofthe80percentofhouseholdwastethatcurrentlycan'tberecycledsuchaschocolatepackagingpensandmobilephones.Thegoalistousethelatestresearchtofindawaytostopsomuchwasteendingupinlandfill垃圾填埋andthengetcompaniestoprovidemoneyfortheprocess.Andsofarit'sworking. Wehaven'tfoundanythingthatwecan'trecyclecommunicationsdirectorofTerraCycleAlbeZakessaid.Butwiththeamountandvarietyofpackagingandlitterintheworldwearealwayslookingfornewwastematerialstodealwith. 1.WhatdoesTerraCyclewanttodo? A.Searchforrecyclablematerialsforuse. B.Dealwithasmanycigaretteendsaspossible. C.Producenewkindsofindustrialplasticproducts. D.Recyclewhatusedtobeconsideredunrecyclable. 2.TheunderlinedwordgarbageinParagraph2probablymeans. A.rubbish B.medicine C.snack D.treasure 3.WhatdoesParagraph3mainlytalkabout? A.Howtousecigaretteendseffectively. B.Howtorecyclecigaretteends. C.Howhardrecyclingcigaretteendsis. D.Whytobreakdowncigaretteends. 4.WhatAlbesaidinthelastparagraphsuggeststhat. A.thereismoreandmorewastetoberecycled B.itisdifficultforTerraCycletorecycleeverything C.TerraCycleistryingtomeetthechallengeofnewwaste D.TerraCyclehassuccessfullyrecycledalargeamountofwaste
上周老师呼吁大家周末在家要分担家务劳动大家响应号召都积极主动地帮助父母做家务.请根据表格的提示内容描述你上周日所做过的家务劳动. 要求1词数70词左右. 2内容必须包括表格中的所有信息. 3可适当发挥想象.
youBobisabletocompletetheworkontime.Itistoohard. A.Notonlybutalso B.Bothand C.Eithernor D.Neithernor
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8分InwhatcasewouldTangDynastypoetLIBaiandWesternheroKingArthermeetandfightagainsteachother?IfnotinyourdreamthenperhapsinagamecalledKingofGlory王者荣耀.CreatebyChinesecompanyTencentKingofGlorywasoneofthemostpopularMOBAgameinChinain2017.KingofGloryhasover200millionpayersaboutoneineverysevenChinesepeopleplaysthegameand55millionofthemplayiteverydayaccordingtoJiguanaChineseanalytics分析company. Ithasover60characterstounlockandplayasyouprogresseachwiththeirownspecialstylesandabilities.Thecharacterscoverdifferenttimesandcountries.SomearerealhistoricalfigureslikeLiBai.Somearenot.Playersusethemtofightagainsteachotherorteamuptofight.Thewinnerscanreachhigherranks. Howeveralongwithhispopularityproblemshavealsocome.Notallreviewsofthegamesaregood.Somethinkthegamecanconfusechildrenbyusingincorrecthistoricalreferences参照.forexamplethepoetLiBaiisdescribedasakillerJingKethemanwhotriedtokillthefirstemperorofChinaisagirlinthegame.Morepeopleworryaboutchildrenplayingthegametoomuchandspendingtoomuchmoneyonit.Playerbelowtheageof19accountfor25.7percentofthegame'splayers.Apieceofnewinwhicha17﹣year﹣oldboyhadaheartproblemafterplayingthegamefor40hourshasalsocreateoppositeviews. TodealwiththisTencentaddedatimelimittothegametopreventkidsfromplayingtoomuch.AsofJuly42017childrenunder12yearsoldcanplaythegameforonlyonehouradaywhileusersbetween12to18gettwohours.Thosewhotrytoplaybeyondthetimelimitwillbelockedoutofthegame. 1.WhichofthefollowingisTRUEaboutKingofGlory? A.Itisthemostpopularonlinegameintheworld B.Itoffers60charactersforplayerstochoosefrom C.Allofthecharactersarerealhistoricalfigures DPlayersfightagainsteachotherorteamuptofight 2.Theunderlinedsentencetellusthat. A.KingofGloryiseasilydesignedforanyonetoplay B.KingofGloryisapopulargametoplay C.Moreplayershavebeeninvitedtoplaythegame D.KindofGloryisdesignedonlyforChineseplayers 3.WhydidTencentaddatimelimittothegame? A.Becausechildrenareverycurious B.Childrenspendtoomuchtimeplayingthegame C.Thegameusesincorrecthistoricalreferences D.Childrendon'thaveenoughtimetoplaythegame 4.Wheremightyoufindthiskindofstories? A.Inanewspaper B.Inatravelguidebook C.Inabookreview D.Inagameinstruction
八达岭野生动物园老虎伤人事件一度引起民众的广泛关注血淋淋的事件再次告诫我们遵守规则的重要性.假如你是一名保定城市文明志愿者请用英语写一篇70词左右的文章向游客宣传动物园旅游的注意事项倡导安全文明游园. 提示1Whatshouldwedotoprotectourselvesinthezoo? 2Whatshouldwedotokeeptheanimalsinthezoosafeandhealthy? 3Whatshouldwedotokeepthezooclean? 参考词汇keepawayfromtakephotosfeedthrowkeep…clean. 要求1文章包括所有提示内容可适当发挥. 2开头和结尾已给出不计入总词数. HelloeveryoneWelcometoBaodingZoo.Tohaveawonderfultripwemustfollowsomerules. Enjoyyourselvesandhaveaninterestingday.
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Rainforestscover6%oftheearth'ssurface.TherearerainforestsinmanypartsoftheworldbutthebiggestrainforestsareinSouthAmericaAfricaandSouthEastAsia.Therearen'tanyrainforestsinEuropeorNorthAmerica. Thousandsofanimalsliveintherainforests.Therearemanybeautifulbirdsinsectsandreptiles爬行动物intherainforests.Therearealsothousandsofdifferentplants.Itisalwayshotinarainforestandthegroundisalwayswet.Itisalsodark. Therainforestsareveryimportanttous.Thetreesandotherplantsintherainforestshelptomaketheairthatwebreathe.Theygiveuswoodrubber橡胶fruitsandmanyofourmedicines. Butinmanyplacestherainforestsareindanger.ForexamplemanyyearsagotherewasalargerainforestinJava爪哇岛.Therewerethousandsofdifferentplantsandanimalsinitbutnowthereisnothing.Peoplecutdownthetreestogrowrice.ManyanimalswenttootherpartsofJavabutsomeanimalsdisappearedforever.Thesamethingishappeningnowinmanypartsoftheworld. Therainforestsareindanger.Soweshouldcareabouttheprotectionofthem. 1.Wherearethebiggestrainforests? A.Inmanypartsoftheworld. B.InNorthAmericaEuropeandSouthwestAsia. C.InEuropeandNorthAmerica D.InSouthAmericaAfricaandSouthEastAsia 2.liveintherainforests. A.Thousandsofanimals. B.Thousandsofdifferentplants. C.Alargenumberofanimalsandplants. D.Somefruitsandmanymedicines. 3.WhydidtherainforestdisappearinJava? A.Becausepeoplecutdownthetrees. B.BecausesomeanimalswenttootherpartsofJava. C.Itisalwayshotintherainforest. D.It'sdarkandwetintherainforest. 4.Whatisthemainideaofthefourthparagraph? A.TherewasalargerainforestinJava. B.Therainforestsareindanger. C.Someanimalsdisappeared. D.Therainforestsareimportant. 5.Whatdoesthewriterwanttotellusinthispassage? A.Rainforestscover6%oftheearth'ssurface. B.Thetreesandotherplantsintherainforestshelptomaketheairthatwebreathe. C.AlargerainforestinJavadisappeared. D.Weshouldprotecttherainforests.
helpputmakefamilyheavy BencouldhearstrongwindsoutsidehishomeinAlabama.Blackcloudsweremakingtheskyverydark.Withnolightoutsideitfeltlikemidnight.ThenewsonTVreportedthata1rainstormwasinthearea. Everyoneintheneighborhoodwasbusy.Ben'sdadwas2piecesofwoodoverthewindowswhilehismomwasmakingsuretheflashlightsandradiowereworking.Shealsoputsomecandlesandmatchesonthetable. Benwashelpinghismom3dinnerwhentherainbegantobeatheavilyagainstthewindows.Afterdinnertheytriedtoplayacardgamebutitwashardtohavefunwithaseriousstormhappeningoutside. Bencouldnotsleepatfirst.Hefinallyfellasleepwhenthewindwasdyingdownataround300a.m.Whenhewokeupthesunwasrising.Hewentoutsidewithhis4andfoundtheneighborhoodinamess.Fallentreesbrokenwindowsandrubbishwereeverywhere.Theyjoinedtheneighborsto5cleanuptheneighborhoodtogether.Althoughthestormbrokemanythingsapartitbroughtfamiliesandneighborsclosertogether. 1. 2. 3. 4. 5.
他刚才在图书馆浏览了今天的报纸. Hetoday'snewspaperinthelibraryjustnow.
10分ThedaywasThankfulThursday.Itisaweekly1thatmytwolittlegirlsandIbeganyearsago.Wegooutintheworldanddocharitywork.LastThursdayweweregoingtobuy2forthebeggarsinthestreet. Iordered15lunchesfromMcdonald'sand3todeliverthem.Welovewhatwesawinthestreetaan4andhappypersonholdinguptheirlunchbag. Thenwenoticedanoldwomanaskingforchange.Wehandedherourfinallunch.Aswegotintothecarshestartedto5tous.Noonehaseverdone6likethisformebeforeshesaidwithasmile.wellI'mgladthatwewerethefirst.Ireplied.So7willeatthelunch?Iasked. ShejustlookedatmewithherhugetiredbrowneyesandsaidOhhoneyI'mnotgoingtoeatthislunchmyself.YouseeIhavealittlegirlofmyown.Iusuallycan't8tobuyherthefoodsheenjoys.Buttonightshewillbehappy. Idon'tknowifthekidsnoticedthetearsinmyeyes.Ihavequestionedmanytimewhetherouractsofkindnessweretoo9toreallybringaboutchange.Yetinthatmoment.I10thetruthofMotherTeresa'swordsWecannotdogreatthinsonlysmallthingswithgreatlove. 1.Acelebration Bbehavior Cduty Dtradition 2.Abreakfast Blunch Cbrunch Dsupper 3.Asetout Bsetaside Csetabout Dsetup 4.Aconfident Beasygoing Csurprised Doutgoing 5.Achat Bspeak Ctell Dshout 6.Aeverything Bsomething Cnothing Danything 7.Ahow Bwhere Cwho Dwhether 8.Await Bhelp Cafford Dpromise 9.Aweak Bsmall Chuge Dmany 10.Arecognized Brefused Creceived Drecycled
Thissummerourfamilywentona1v.Wewenttothenationalpark.Itwasinthe2northpartofthecity.We3atheparkat600inthemorning.Theairwasfreshandwesawgreentreeseverywhere.Ifeellike4climbuparocktopickflowers5mymotherstoppedme.She6wmenottodothat.Shesaiditwas7dangeranditalsowasharmfultothenature.Wesaw8hundredofdifferentplantsandwelearned9lotaboutthenatureas10good. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10.
Tomisaverypopularyoungman.Hehasmanyfriends.Hehasgotfourinvitations.Herearehisreplies. 1.FromthereplieswelearnthatJimlikes. A.goingtoparties B.listeningtopopmusic C.dancingwithTom D.playingtennis 2.Tomwillgotothedancewith. A.Kate B.Susan C.Jim D.Cary 3.TomwillgotoSusan'sbirthdayparty. A.onSaturdayevening B.thisevening C.onThursdayevening D.onSundayevening
Lifeislikeajourney.Onthewaywehavehappinessandsadness.1It'snotdifficultforanyonearoundyoutotellhisregrets.Whenwegetolderwelookbackandwishthatwehadmadebetterchoices.Howcanweavoidfutureregrets? Makebetterplans Ifyoustarttodosomethingyou'dbettermakeaplanbeforedoingit.Theearlierthebetter.Youwillknowwhatcomesfirstandwhatcomeslast.2.Ifchangeshappenyoucanhavemoretimetodealwiththem. Liveamoreactivelife Youcangoaroundmoreoften.Moreoutdooractivitiescankeepyourelaxedandactive.Youalsoneedtobekind.Thankyoucanbringasmiletosomeone'sface.3. Findtherightfriend Afriendmaymakeyourlifeandheorshecanbreakyourlifeaswell.Soyouneedtothinktwicewhenyouchooseafriend.Goodfriendswillalwaysmakeyourideasbetter.4.Thatlittlehelpmaygetyougoodresults. Neverfearfailure Everybodyfails.Eventhegreatestpersonfailed.5.Wemusttakefailureasachancetolearnandimproveourselves. Lifeisgood.Wedon'thavetoliveinourpastbutwedohopethatwecanplanbetterlivebetterandworkbetterwhenwehavethechancetodoso. A.Weshouldnotfearfailurebecausefailureisnottheendoftheroad B.Learntosaysorryanddon'tbeangrywithothers C.Sometimesitisalsofullofregrets D.You'llalsoknowwhatyoushoulddoandwhatyoushouldn'tdo E.Whenyougetintotroubleaskothersforhelp 1. 2. 3. 4. 5.
﹣Whatwereyoudoingat400pmyesterdayafternoon? ﹣Itheclassroom. A.cleaned B.willclean C.wascleaning D.clean
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pleasantonswingittoplayisthe .
他的梦想是在创立一个学校. Hisdreamistoaschool.
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