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为测定某补血剂样品（主要成分是硫酸亚铁晶体（FeSO4•7H2O））中铁元素的含量，某化学兴趣小组设计了如下两套实验方案．请按要求回答下列问题： 方案一：将FeSO4转化为Fe2O3，测定质量变化...
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高三下学期化学《》真题及答案
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工业上采用硫铁矿焙烧去硫后的烧渣主要成分为Fe2O3FeOSiO2Al2O3不考虑其他杂质制取七水合
硫酸亚铁晶体FeSO4·7H2O在医药上作补血剂某课外小组的同学欲测定该补血剂中铁元素的含量实验步骤
硫酸亚铁晶体FeSO4•7H2O.在医药上作补血剂.某课外小组测定该补血剂中铁元素的含量.实验步骤如
硫酸亚铁晶体FeSO4·7H2O在医药上作补血剂某课外小组的同学欲测定该补血剂中铁元素的含量实验步骤
Fe是人体不可缺少的微量元素摄入含铁化合物可补充铁硫酸亚铁晶体FeSO4·7H2O在医药上作补血剂某
硫酸亚铁晶体FeSO4·7H2O在医药上作补血剂某课外小组测定该补血剂中铁元素的含量并检验该补血剂是
硝酸亚铁是一种重要的食品和饲料添加剂某补血剂样品[主要成分为碳酸亚铁晶体FeSO4•7H20]某化学
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硫酸亚铁晶体FeSO4·7H2O在医药上作补血剂某课外小组的同学欲测定该补血剂中铁元素的含量实验步骤
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铁是人体不可缺少的微量元素硫酸亚铁晶体FeSO4·7H2O在医药上作补血剂某课外小组测定该补血剂中铁
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工业上采用硫铁矿焙烧去硫后的烧渣主要成分为Fe2O3FeOSiO2Al2O3不考虑其他杂质制取七水合
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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
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.
10分 InrecentyearsfourChinesetechnologicalinnovationsstandoutintheworld.Theyare1asfournewgreatinventionsofmodernChina. High﹣speedtrains Chinacreateditsfirsthigh﹣speedrailwaylinein2008.Sincethenthenumberofpassengertripshasincreased2over30percenteveryyear.Bytheendof2016morethan5billiontripshadbeentakenonChina'shigh﹣speedtrains.Chinaiscurrentlyworkingonthenew3oftrainsthatwillhaveatopspeedof400kilometersperhour.By2020one﹣fifthofthecountry's150000kmrailwaynetworkwillbeusedbyhigh﹣speedtrains.ThisnetworkwillconnectmorethanpercentofmajorcitiesacrossChina. Mobilepayment Mobilepaymentis4Chinaintoacashlesssocietywhichisledbythird﹣partpaymentcompanieslikeAlipay.Forexampleinsteadofplayingbycashcustomersnowpayforgoods5byputtingashortpassworldintotheAlipayappon6mobilephone.Userscanalsopaytheirwaterand7billsthroughit.Alipayalsoallowsuserstobuythingsoninternationalwebsites. Sharebikes Sharedbikes8startedinWesterncountries.ButChinahassurprisedtheworldwithhowquicklyithaswidelyusedsharedbikes.ThesebikeallowuserstopickuporparksabikeonthestreetthroughGPSandsmartphoneapps.To9abikeyoujustneedtoscanaQRcode二维码onasharedbikewithasmartphoneappandtherideaway.Afteryoufinishridingyoucanparkitatavailableareaslockitandpayforyourridethroughmobilepaymentservice. Onlineshopping Witharound751millioninternetusersChinahaslongbeentheworld's10andfastest﹣growingonlineshoppingmarket.Onlineshoppingnowaccountsfor15.5percentoftotalretailsalesinChina.Thankstolowercostsandfewerlicensingrequirementsit'seasierforsellertoopenanonlineshopinChina.Italsohelpedtocreatejobs. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10.
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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.
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helpputmakefamilyheavy BencouldhearstrongwindsoutsidehishomeinAlabama.Blackcloudsweremakingtheskyverydark.Withnolightoutsideitfeltlikemidnight.ThenewsonTVreportedthata1rainstormwasinthearea. Everyoneintheneighborhoodwasbusy.Ben'sdadwas2piecesofwoodoverthewindowswhilehismomwasmakingsuretheflashlightsandradiowereworking.Shealsoputsomecandlesandmatchesonthetable. Benwashelpinghismom3dinnerwhentherainbegantobeatheavilyagainstthewindows.Afterdinnertheytriedtoplayacardgamebutitwashardtohavefunwithaseriousstormhappeningoutside. Bencouldnotsleepatfirst.Hefinallyfellasleepwhenthewindwasdyingdownataround300a.m.Whenhewokeupthesunwasrising.Hewentoutsidewithhis4andfoundtheneighborhoodinamess.Fallentreesbrokenwindowsandrubbishwereeverywhere.Theyjoinedtheneighborsto5cleanuptheneighborhoodtogether.Althoughthestormbrokemanythingsapartitbroughtfamiliesandneighborsclosertogether. 1. 2. 3. 4. 5.
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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.
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5分AHeyJack!Icametoyourhouseyesterdayafternoonbutyouweren'tin. BSorrySarah！1 AWasitabirthdayparty? BNoitwasaschool﹣leavers'party.Wearegoingtofinishourmiddleschoollifesoon. ASoweare.Howaretheparty? BItwasgreatbutIfeelsadbecauseIdon'twanttoleavemydearteachersandclassmates. AThat'strue.2.Bythewaywhat'syourplanaftergraduation? BIt'shardtosay.3 AThat'sagreatidea.What'stheproblemthen? BMyparentsdon'tagree.Theywantmetogotoagoodhighschoolandthenenteragoodcollege. A4 BYesbutIonlywanttoplayfootball. A5You'dbetterhaveafurthertalkwithyourparents. A.Ihaven'tdecidedyet B.Butyoucanstillplayfootballincollegecan'tyou? C.Iwashavingapartyatschoolatthattime D.Ithinkyoushouldworkhardatyoulessons E.Afterallyouhavestayedtogetherfornearlythreeyeas F.I'dliketobeafootballplayersbecausefootballismyhobby G.That'sreallyaproblem. 1. 2. 3. 4. 5.
6分ThewordformilkinGermanisMilch.InFrenchitislait.Usuallyyoudon'tfindthesamewordsineverylanguage.ButthereisanexceptionforthewordOK. ItisthemostfrequentlyspokenexpressionintheworldOKwasfirstintroducedtotheworldintheBostonMorningPostonMar.231839.Itreado.k.allkorrectwhichmeansallcorrect.AlthoughitwasonlyajokeatthattimelaterpeoplebeganmarkingOKondocumentsandusingOKonthetelegramtosaythatallwaswell.Todaypeoplecrosscountriesusethisexpressioneveryday.Howabout2o'clock?OK?OKOKthen.ThewordOKiseasytosayandwriteandclearenoughtobeunderstood.Besidesitoffersneutrality中立thatotherwordsdon'thave.Ifyousaysomethingisgreatsomepeoplemaysayitisn't.ButwithOKeveryonegenerallyagrees. Arethereanyotherwordsthatcancrosscountriesandcultures? Huhisanothercommonlyusedword.Researchersfoundthathuhmeanssurpriseordisbeliefin10differentlanguages.Sometimespeopleneedawordtoexpressmanymeaningsatonce.Forexamplesometimesthereisaproblemofunderstandingoryouwanttoasksomebodyforareaction.Sayinghuhisshortandeasytosayandhear.Alsoyoudon'tneedtolearnthiswordjustlikeyoudon'tneedtolearntocryorlaugh.Huhjustcomesoutnaturally. Otherwidelyusedwordsincludemamawhichisconsideredtobetheeasiestwordforbabiestopronounce.Don'tforgetgameover.Itisnotonlyusedbysportsfansbutalsotodescribetheendofaneventinreallife. 1.WhichoffollowingisNottrueaboutOK?. A.Itwasajokeforallcorrectatfirst. B.Itwasfirstusedonthetelegraph C.Itiseasytobeunderstand D.It'snotastrongwordtoshowyouopinion 2.HuhiswidelyusedNOTbecause A.itcanexpressmanymeaningsatonce B.it'seasytosayandhear C.youdon'tneedtolearnit D.it'stheeasiestworldforustopronounce 3.What'sprobablythebesttitleforthestory?. A.Wordswithoutborders B.Themostpopularwords C.Wordsweoftenuse D.Mostwidelyusedwords
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15分人们常说要看中国五百年青岛北京要看中国五千年请西安.近几年世界四大文明古都之一西安成为千万人前来打卡的网红热门城市长安城青灰色的城墙映衬着绚丽的街灯阐释着西安年.最中国的传统文化精华与大国文化自信.假如你是Jim你受邀请浏览西安请以AvisittoXi'an为题写一篇短文介绍你到西安的所见所闻所想. 提示alonghistoryvisitlotsofinterestingplacesdeliciousfoodfriendlypeople 要求语句通顺意思连贯书写工整不少于70字开头已经给出不计入总字数. It'smyhonortobeinvitedtovisitXi'an.SoIhadachancetolearnaboutthishistoricandbeautifulcity.
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