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某KCl固体样品中含有少量CaCl2杂质，实验室提纯氯化钾的流程如图．（氯化钾溶解度受温度影响较小） （1）沉淀a是 ． （2）操作I是 ． ①冷却热饱和溶液 ②蒸发结晶 （3）若...
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某氯化钾样品含有杂质氯化钙和氯化镁实验室提纯流程如下①操作A.的目的是使样品________X.溶液
某氯化钾固体样品中含有少量氯化钙和硫酸镁等杂质实验室提纯氯化钾流程如图1操作A的目的是使样品过滤时用
某氯化钾样品含有杂质氯化钙和氯化镁实验室提纯流程如下第1题图1操作A的目的是使样品_________
某氯化钾样品含有杂质氯化钙和氯化镁实验室提纯流程如下①操作A.的目的是使样品________X.溶液
氯化钾样品中含有少量碳酸钾硫酸钾和不溶于水的杂质为了提纯氯化钾先将样品溶于适量水中充分搅拌后过滤在将
氯化钾固体样品中混有少量碳酸钾和硫酸钾两种杂质为了获得纯净的氯化钾将样品溶解按如图所示步骤进行提纯.
某碳酸钾固体样品可能含有硫酸钾碳酸钙硫酸铜氯化钾的一种或几种杂质为了确定杂质的成分进行以下实验1取少
氯化钾固体样品中混有少量碳酸钾和硫酸钾两种杂质为了获得纯净的氯化钾将样品溶解按如图所示步骤进行提纯.
实验室需要纯净的氯化钾现有氯化钾中含有少量溴化钾硫酸钾和氯化铵按照下列实验方案提纯分离出氯化钾列式计
已知硝酸银与氯化钾反应生成硝酸钾和不溶于水的氯化银化学方程式为AgNO3＋KCl===AgCl↓＋K
某氯化钾样品含有杂质氯化钙和氯化镁实验室提纯流程如下1操作A.的目的是使______________
氯化钾固体样品中混有少量碳酸钾和硫酸钾两种杂质为了获得纯净的氯化钾将样品溶解按如图所示步骤进行提纯.
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氯化钾固体样品中混有少量碳酸钾和硫酸钾两种杂质为了获得纯净的氯化钾将样品溶解按如图所示步骤进行提纯.
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已知硝酸银与氯化钾反应生成硝酸钾和不溶于水的氯化银化学方程式为AgNO3＋KCl===AgCl↓＋K
氯化钾固体样品中混有少量碳酸钾和硫酸钾两种杂质为了获得纯净的氯化钾将样品溶解按如图所示步骤进行提纯.
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类推是一种重要的学习方法但如果不具体问题具体分析就会产生错误的结论下列类推结论正确的是
6分Don'tyouhaveanytoysyouwanttoshareIaskedmysonduringourchurch'sChristmastoydrive.Whataboutallthosethingsinyourclosetyouhaven'tusedinyears Idon'thaveanythinghesaid.We'resopoor. We'reonlypoorbecausewerefusetobuyhimthephonehewantsforChristmaswhichwouldalsorequireamonthlytextingcharge. You'renotsopooryouhavenothingtogiveIfoundmyselfsayingtohimaphrasemymotheroftenusedonme. AtworkthenextdayoneofmystudentssaidIdidn'tspellyournamerightasshehandedmeaChristmasgift﹣aboxofchocolates.Nowondershehadn'tspelleditright﹣I'hadonlyworkedatthecenterforacoupleofmonthsandmynameisnoteasytopronounceeveninEnglishwhichisthiswoman'ssecondlanguage. Ihadn'texpectedagift﹣Iworkedatanadulteducationcenterwherewedealtwithpeoplewhostruggleeconomically.WhenIwashiredmybosstoldmeshetriestokeepsnacksaroundthecenterandcooksstonesouponceaweekwherewhoevercanbringsomethingindoesbecauseYouwillheargrowlingbellieshere.Theygivetheirfoodtothechildrenbeforetheythemselveseat. Andyetthesepeoplesogratefulforasecondchanceatgettinganeducationunabletosometimesevenaffordthegasmoneytocomeinmanagetodosomethingforusnearlyeveryweek.Somebringinfoodothersdochoresaroundthecenter.Theyhelpandencourageoneanotherandus.Theygivewhattheyareabletogive. 21.Whodoestheeducationcenterintendtohelp A.Localpeopleoutofwork B.Adultstudentsunabletospell C.Immigrantsonemptystomachs D.Poorpeopleeagerforeducation 22.Whatcanwelearnfromthetext A.Studentslearntodochoresatthecenter B.Theboywasunwillingtosharehistoys C.ThecenterofferschocolateasaChristmasgift D.Theauthorhashighexpectationsofherstudents 23.Whatmaybethebesttitleforthetext A.NeverTooPoortoGive B.NeverTooLatetoLearn C.ASecondChancetoSeize D.AnUnexpectedGifttoTreasure.
工业上使用黄铁矿主要成分为FeS2经多步反应制取硫酸其中第一步反应为4FeS2+11O22X+8SO2则X的化学式为
15分假设你是红星中学高三学生李华.你的英国朋友Jim想了解中国人起名字的习惯并请你帮他起一个中文名字.请给他写封信内容包括 1.介绍中国人起名字的习惯 2.给他起一个中文名字 3.说明起此名字的理由. 注意1.词数不少于50 2.开头和结尾已给出不计入总词数. DearJim Yours LiHua.
在托盘天平灵敏度极高两边各放一只等质量的烧杯在两只烧杯里各加入足量等质量等质量分数的稀盐酸调节天平至平衡然后向左端烧杯加入5.6克铁要使天平再次平衡应向右边烧杯加入
8分ForseveralyearsthearttradeinLondonhasknownaboutthepossibleexistenceofthetreasureofthewesterncavedatingfromthe6thcenturyBC.ItwassaidtohavebeendiscoveredbyfarmersinwesternIranaround1992.Outofbetween200and600piecesonlyafewhavesofarsurfaced.TheIranianswereveryangrythattheymanagedtoseizeonlypartofthecollectionandthattherestwastakenabroadillegally.Butnowtheymayworryless.Anacademicpaperhasjustproducedconvincingevidencethatatleastonepieceisafake赝品. Fakesalwaysexistintheworldofantiquities古物butwhatisastonishingishowwidespreadtheyarenow.AreportfromtheArchaeologicalInstituteofAmericaconcludesthatnolessthan80percentofallancientwestAfricanpiecesonthemarketarefake.Howcanthisforgery伪造cultureboomItisfoundthatabout80percentoftheantiquitiestradedhavenoclearsource.Inotherwordsitisnotknownwheretheywerefoundandthereforeeveniftheyarerealtheycantelluslittleaboutancienthistory. Peopleinthetradesaythatthemajorityoftheseobjectswerefoundincasualdiscoveries.Shamefullytheyknowthatthisisnottrue.Theyadvancethefictionbecauseitsuitstheircommercialpurposes.Therealityisthattheobjectscomefromrobberynotbylocalfarmershappeningonafewfinds.Thetreasureofthewesterncaveisaclassicexampleofhowfakingworks. Fakingisbigbusinessandisofsuchastandardthateventhegreatestscholarsmaybefooledsomeofthetime.Theantiquitiestradelikestoplaydownnotonlytheextentofrobberyandfakingbutalsotheoverlapbetweenthetwo.Theselatestreportsletthecatoutofthebag.Butitistheoverlapwithrobbedantiquitiesthatisthemostsignificantfactorwhichleadstothecultureofforgery. Collectorsofantiquitiesneedtobeawarethattheynotonlyaidtherobberyofpotentiallyinvaluablesitesbutputthemselvesatthemercyoffakersaswell…. 67.Whatdoweprobablyknowaboutthetreasureofthewesterncave A.It'sslightlybroken. B.It'stotallyreal. C.It'spartlyfake. D.It'sfairlynew. 68.Whatastonishestheauthor A.Thehugenumberoffakes. B.Thelonghistoryoffakes. C.Theinfluenceoffakes. D.Theoriginoffakes. 69.Accordingtothepassageforgeryculturemainlyresultsfrom. A.abeliefincasualdiscoveries B.highfakingstandards C.antiquitieswithoutaclearsource D.closecombinationofrobberyandfaking 70.Whichisprobablythelastsentenceofthepassage A.Thisisthemainsourceforrobbery. B.Whatshallbedonetostopthistrend C.Arecollectorsofantiquitiesawareofit D.Theyarebeingnotjustdishonestbutfoolish.
下列各组物质间通过一步反应就能实现如图转化的是
25分假定你是李华想申请参加2017全球青年峰会GlobalYouthSummit.你写信请外教Mr.Smith帮你写一封推荐信介绍你的英语能力个性特点等并于今年7月5日前发到gys2017@GYLeadership.org. 注意 1.词数100左右 2.可以适当增加细节以使行文连贯 3.不得透露考生本人所在学校及个人真实信息.
元素周期表中锌元素的某些信息如图所示下列有关锌的说法错误的是
8分AguidingprincipleformastercellistYo﹣YoMaisthattheintersection交汇ofculturesiswherenewthingsappear.Certainlyhisbiographyisanintersectionofcultures.HewasborntoChineseparentsinParisFrancebothhisparentsweremusicians.WhenhewassevenhisfamilymovedtotheUnitedStates.GiftedforhisageMaattendedJuilliardtheworldfamousmusicinstitute.HethenchosetoearnaliberalartsdegreeatHarvardratherthanfocusingonlyonmusic. EveninhisearliestperformingyearsYo﹣YoMahadastrongbeliefthatitwasimportanttosharemusicwithallkindsofpeople.Storiesaretoldabouthowheonceperformedinthehallwayofalargebuildingforpeoplewhowereunabletogetticketstohisconcert.HeremainedinterestedinmakingmusicaccessibletodiverseaudiencesandfurtheredhisinterestindifferentcultureswhenhevisitedtheBushmenoftheKalahari.HedevelopedavehicletofurthertheseidealswhenhefoundedtheSilkRoadProject. AshehassaidtheSilkRoadisametaphor隐喻foranumberofthingsastheInternetofancienttimestherouteswereusedfortradebyreligiouspeopleadventurersscientistsstorytellers.EverythingfromalgebratoIslammovedalongtheSilkRoad.It'sthelocal﹣globalthing.Intheculturalworldyouwanttomakesurethatvoicesdon'tgetlostthatrichtraditionscontinuetolivewithoutbecomingcommon. ThislessonexploresthephilosophybehindYo﹣YoMa'sfoundingoftheSilkRoadEnsemble乐团hisbeliefthattheartsandparticularlymusiccanmaketheworldbetterandthatthroughcooperationonecanbothpreservetraditionandshapeculturalevolution.Studentsalsoexploretheirownattitudestowardtheartswritingreflectiveessaysonhowtheartshaveplayedaroleintheirownlives. 28.WhatdowelearnaboutYo﹣YoMaaccordingtoParagraph1 A.HestudiedmusicinFrance B.HestartedhiscareerinHarvard C.Heshowedgreatmusicaltalent D.HeearnedaliberalartsdegreeinJulliard 29.WhichofthefollowingcanbestreplacethewordvehicleinParagraph2 A.Car B.Medium C.Skill D.Project 30.WhatdoesYo﹣YoMathinkoftheSilkRoad A.Therouteiskeytomusicaldevelopment B.Ithassignificantinfluenceontheworld C.Itsimplyhelpswiththespreadofreligions D.Traditionsarepassedonthroughtheroute 31.WhydidYo﹣YoMafoundtheSilkRoadEnsemble A.Tofostercooperationinbusiness B.Torecordthevoicesalongtheroute C.Toexplorepeople'sattitudetowardthearts D.Tosharemusicandpromoteculturaldevelopment.
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6分Herearethebesttravelsiteswe'vefoundtohelpyougetthebestbargainsonairfares. 1Kayak.comscours搜索hundredsofonlinesourcesforthecheapestfare.Themoreflexibleyouareontimethebetteryouhavethechancesoffindingagreatbargain.Searchfordatesuptothreedaysbeforeoronanyweekendsinthenextyear.Andwiththesite'sexploretoolyoucanscanaworldmapforalltheplacesyoucanreachwithinaspecifiedper﹣ticketpricerange. Kayakcanalsoforecastwhetherfareswillgoupordownwithitspricepredictor.Enteryourdesiredtravelplanandthesitewillreturnalistofflightoptionsalongwitharecommendationtoeitherbuynoworwaitforafaredrop. 2AirfareWatchdogworksbestfortravelersreadytotakeoffatthedropofadeal.ThesitehasactualpeoplehidingonairlineWebsitesexpectingfaresales.TheysignupforrewardsprogramstogetpromotionalcodesanddiscountoffersthatcanbepassedontoAirfareWatchdogusers.AlsoinNovember2014thesiteaddedanewserviceHotelwatchdogwhichfetcheshotellistingsthatoffergreatvaluesmeaningtheyhavepriceslowerthansimilarnearbyhotels. 3WhichBudget.comwillhelpyoubuildaninexpensiveoverseasflightplanbyusinglocalbudgetairlines﹣﹣﹣agreatwaytosaveoninternationaltravel.Selectyouroverseasstartingpointendpointorbothandthesitewilllistairlinesyou'veprobablyneverheardof.ForexampleifyousearchforflightsfromBangkoktoBeijingyou'llgetoptionsfromChinaEasternandHainanAirlines. 21.HowcanyougetthebestbargainbyusingKayak.com A.Getthepromotionalcodesanddiscountoffers. B.Leaveplentyoftimetobookyourticket. C.Buyaround﹣tripticket. D.Selectyourstartingpointandendpointinadvance. 22.WhichofthefollowingisthenewserviceprovidedbyAirfareWatchdog A.Alistofhotelswiththelowestprice B.Promotionalcodesanddiscountoffers. C.Alistoflocalbudgetairlinesforforeigntravelers. D.Adviceonbuyingtheticketnoworwaitforadrop. 23.Thepassageiswrittenfor. A.peoplewhowanttoknowwheretotravel B.peoplewhodon'thavepromotionalcodes C.peoplewhoplantobuyairplanetickets D.peoplewhoworkinanairlinecompany.
25分假定你是李华最近你在当地报纸上看到一则游泳培训班的广告称其有称职教练instructor一周包会.你会一点游泳但水性不太好想在暑假参加训练.请你写一封咨询信了解相关情况要点如下 1.训练的具体时间和地点. 2.条件和费用. 3.其他特别注意的事项. 注意1.词数100词左右. 可以适当增加细节以使行文连贯 DearSir/Madam . Sincerelyyours LiHua.
“十八大”以来我国政府高度重视生态文明建设．以下做法不利于环境保护的是
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8分Andyrodeslowlyonhiswaytoschoolday﹣dreamingaboutthefishingtripthathisfatherhadpromisedhim.Hewassobusydreamingaboutallthefishhewouldcatchthathewasunawareofeverythingelsearoundhim. Herodealonguntilastrangesounddrewhimtothepresent.Hecametoastopandlookedcuriouslyuptotheheavens.Whathesawshockedandterrifiedhim.Ahugeswarmofbeesfilledtheskylikeablackcloudandthebuzzingmassseemedtobeheadingangrilytowardshim. WithnotimetowasteAndyspedoffintheoppositedirectionridingfuriously﹣butwithoutknowinghowtoescapetheswarm.Witharapidlybeatingheartandhislegspumpingfuriouslyhespeddowntheroughroad.Asthebeescamecloserhispanicincreased.Andyknewthathewassensitivetobeestings蜇.Thelaststinghadlandedhiminhospital﹣andthatwasonlyonebeesting!Hehadbeenforcedtostayinbedfortwowholedays.Suddenlyhisfather'swordscametohim.Whenyouareinatightsituationdon'tpanic.Useyourbrainandthinkyourwayoutofit. OnanearbyhillhecouldseesmokewavingslowlyskywardsfromthechimneyoftheNelsonfamilyhome.Beesdon'tlikesmokehethought.Theycouldn'tgetintothehouse.AndyracedtowardstheNelsonhousebutthebeesweregainingground.Andyknewhecouldnotreachthehouseintime.Heestimatedthatthebeeswouldcatchupwithhimsoon. SuddenlyoutofthecornerofhiseyeshespottedasmalldamusedbyMr.Nelsontoirrigatehisvegetablegarden.Offhisbikeandintothecoolwaterheliveddisappearingbelowthesurfaceandawayfromthesavageinsects.AfterholdinghisbreathforaslongashecouldAndycameupforairandnoticedthebeeshadgone.Dragginghimselfoutofthedamhestruggledupthehillyslopeandrangthedoorbell.Mrs.Nelsontookhiminsideandranghismother. You'llreallyneedthatfishingbreaktohelpyourecoverlaughedhismotherwithrelief.Thankgoodnessyoudidn'tpanic!ButAndydidnothearher.Hewasdreamingonceagainofthefishhewouldcatchtomorrow. 4.WhydidAndyfailtonoticetheswarmofbeesearlier A.Hewasridingtoschool. B.Hewaslisteningtoastrangesound. C.Hewasgoingfishingwithhisfather. D.Hewaslostinthethoughtofthefishingtrip. 5.WhichofthefollowingisNOTmentionedabouttheswarmofbeesinthepassage A.Theycrowdedlikeablackcloud. B.TheyshockedandterrifiedAndy. C.TheytriedtoattackAndyinamass. D.TheymadeAndystayinhospitalfortwodays. 6.HowdidAndyavoidthebeesintheend A.Herodeoffintheoppositedirection. B.HeaskedMr.Nelsonforhelp. C.Hehidhimselfunderthewater. D.HerushedintotheNelsonhouse. 7.WhichofthefollowingcanbestdescribeAndy'sescapefromthebees A.Nopainsnogains. B.Intimeofdangerone'smindworksfast. C.Oncebittentwiceshy. D.Wherethereisawillthereisaway.
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．
分类是我们学习化学的一种简单易行的科学方法下列关于物质的分类正确是
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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