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草木灰（主要成分为碳酸钾）是农家肥料，小明称取30g草木灰，加入到盛有100g稀盐酸的烧杯中，恰好完全反应，称得烧杯中的溶质质量为121.2g（假设草木灰中其他物质不与盐酸反应且不溶于水）．请计算：...
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草木灰是一种农家肥其主要成分是碳酸钾它属于
钾肥
磷肥
氮肥
复合肥
我市在绿城攻坚战中种植树木花草时常用农家肥草木灰做底肥草木灰有效成分是碳酸钾K2CO3它属于
氮肥
磷肥
钾肥
复合肥
草木灰是一种农家肥料它的主要成分是碳酸钾K2CO3．碳酸钾属于
氮肥
磷肥
钾肥
复合肥
植物燃烧后的残余物称为草木灰其主要成分为碳酸钾．为测定玉米秆燃烧得到的草木灰中碳酸钾的含量某同学称取
草木灰是一种常见的农家肥料其主要成分是碳酸钾K2CO3它属于
钾肥
磷肥
氮肥
复合肥
某草木灰是农村常用的一种肥料其有效成分是碳酸钾某兴趣小组为了测定草木灰中碳酸钾的含量取现有的草木灰7
草木灰是农家肥料它的主要成分是碳酸钾某化学兴趣小组取lOOg草木灰于烧杯中不断滴入稀盐酸溶液当滴人4
草木灰是农家肥料它的主要成分是一种含钾的盐．取一些草木灰加到盐酸中生成的气体可使澄清的石灰水变浑浊
草木灰是农家肥料它的主要成分是碳酸钾还有硫酸钾氯化钾等化学兴趣小组为测定某草木灰样品中的有效成分取1
化肥的使用虽然能大大提高农作物的产量但是也带来了较为严重的环境污染因而我国大力提倡使用农家肥．草木
草木灰的主要成分是
氯化钾
硫酸钾
碳酸钾
硝酸钾
某草木灰是农村常用的一种肥料其有效成分是碳酸钾．某兴趣小组为了测定草木灰中碳酸钾的含量取现有的草木
草木灰是农家肥料它的主要成分是碳酸钾还有硫酸钾氯化钾等化学兴趣小组为测定某草木灰样品中的有效成分取1
草木灰是农家肥料其主要成分是碳酸钾某化学兴趣小组进行如下实验以下是他们的实验过程及数据假设杂质不与稀
草木灰的主要成分是一种含钾的化合物把盐酸滴在草木灰上产生大量气泡生成的气体能使澄清的石灰水变浑浊则
纯碱
碳酸钾
硝酸钾
磷酸钙
草木灰是农家肥料其主要成分是碳酸钾某化学兴趣小组进行如下实验以下是他们的实验过程及数据假设杂质不与稀
草木灰是农家肥料它的主要成分是一种含钾的盐．取一些草木灰加入稀盐酸生成的气体能使澄清石灰水变浑浊．
草木灰是一种农家肥它的主要成分是碳酸钾还有硫酸钾氯化钾等．化学兴趣小组为测定某草木灰样品中的有效成
草木灰是农家肥料它的主要成分是一种含钾的盐．把盐酸滴入到盛有草木灰的是试管里产生的气体可使澄清的石
草木灰是一种农家肥料它的主要成分是碳酸钾K2CO3．碳酸钾属于
氮肥
磷肥
钾肥
复合肥
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Throughthe中介ofrelativeshegottheposition.
北京时间2016年9月15日中国成功发射了“天宫二号”空间实验室．飞船发射升空后与正在轨稳定运行的神舟十一号载人飞船和“天舟一号”货运飞船进行交会对接为未来中国空间站的建立奠定了坚实的基础．请依据信息回答下列问题在太空中如果想在未来中国空间站中进行以下实验你认为其中最难完成的是
以下是四个化学反应的微观示意图图中不同的圆圈代表不同的原子其中能表示置换反应的是
下列图示的实验中涉及到化学变化的是
Whoare说法语的studentshere?
AsachildIwasgenerallyhappysinginganddancingtomyfavoritesongssmilingandlaughingwithmyfriendsandfamily.ButasfarbackassecondgradeInoticedadarknessaboutme.Ididn'tenjoyparticipatinginmanythings. Inmiddleschoolthingsinmylifebegantogetevenworse.IbeganwithdrawingfromeverythingIonceenjoyed.Iwasalwaystired.Everythingwashorrible.FinallymidwaythrougheighthgradeIwastoldIhadachemicalimbalancediagnosed诊断withclinicaldepressionandhadtotakemedicine.Ittookmonthsformetofeeltheeffectsofthemedicine. WhenIbegantofeelhappyagainiswhenIrealizedthatIhadtotaketheresponsibilityforgettingbettermyselfratherthanrelyingonmedicine.AristotlesaidTolivehappilyisaninwardpowerofthesoulandIbelievethatthisquotedescribeswhatIhadtodotoachievehappiness.Happinessisajourney.Everyoneseemstoneeddifferentthingstobehappy. Theessentials要素tohappinessaresomethingtolovesomethingtodoandsomethingtohopeforaquotefromWilliamBlakesumsupwhatIbelievepeopleneedtorealizetobetrulyhappyinlife.PeopleneedloveIfeeltheyneedtheirfamilyandtheirfriendsmorethananythingelseintheworld.Peopleneedworktodosomethingtomakethemfeeltheyaremakingadifferenceintheworld.Peopleneedtoknowthatmoregoodistocomeinthefuturesotheycontinuetolivefornowinsteadofconstantlyworryingaboutthebadthatcouldcome.Loveandhopearehappiness. 28.WhatdoweknowabouttheauthorinParagraph2? A.Hehatedgoingtosleepbecausehecouldn'tsleepwell. B.Hespentmonthsrecoveringfromtheclinicaldepression. C.HewasdiagnosedwithclinicaldepressioninGradeSeven. D.Hesufferedagreatdealfromclinicaldepression. 29.Whohelpedtheauthortobehappyagain? A.Theauthor'sfriends.B.Aristotle.C.Theauthorhimself.D.William. 30.Whichofthefollowingaboutbeingtrulyhappyisunnecessaryintheauthor'sopinion? A.Love.B.Ambition.C.Hope.D.Work. 31.Whatmaybethebesttitleforthetext? A.TheEssentialstoHappiness B.WaystoOvercomeShortcomings C.EveryoneNeedstoBeHappy D.HappinessIsLove.
SeveralcountriesinAsiacelebratetheLunarNewYearintheirownway.ButdragonandliondancesinChinatownsallovertheworldhavehelpedtomakeChina'sNewYearthemostfamous.Thesedaysgrowing61numberofpeoplewhoarenotofChineseoriginarejoiningin.InTokyowindowcleanersdressup62theanimalsoftheChineseShengxiaoAmericaCanadaandNewZealandhavepublishedmemorialstampsfortheyearofthechicken.LastyearNewYorkCitymadetheLunarNewYear63schoolholidayforthefirsttime. ThespreadoftheSpringFestivalis64partduetorecentimmigrationfromChina9.5millionChinesepeople65moveabroadsince1978manyof66arefarricherthanearlierwavesofimmigrants. AwareofChina'sgrowingeconomicandpoliticalinfluenceforeignleadershavenoticedtheoccasion.Britain'sprimeministerTheresaMayhasgivenavideoaddressatradition67startin2014byherpredecessor前任.Thisyear'sWorldEconomicForuminDavoswasheldaweekearlierthanusual68avoidconflictingwithChina'sNewYear. Chinahopesthefestivalwillpromote69itculturalsoftpowerabroad.SokmaygivetheChinesepeople70satisfytoseeforeignersenjoysuchfestivities.
如图所示实验室里有一套用来制取气体的装置下列有关叙述正确的是
Myshirtgothonanailwhichmadeabigholeinit.
下列实验方法错误的是
Heanaveragecitizenalwaysthinksofhecandomoreforthepeople. A.how B.why C.what D.which
下列实验操作中正确的是
For显而易见的reasonsI'dprefernottogivemyname.
下列离子能在pH＝2的水溶液中大量共存的是
Experiencearoundfoodisabouttheplace.Thetimeandthepeopleandthebestmealcanbefoundmafinediningrestaurantorinacrowdedstreetmarket.Howcanyourecreatethatspecialmomentinfluencedbyplaceandtime?Travelisbecomingthemostpopularreasontovisitmanyplacesaroundtheworld.Herearetheplacesthatconsistentlyexcitethesenses. SouthofFrance Marketswithfreshfruitsandvegetablesandbutchershopsarcabundant.Regional地区的winesareexcellent.AndfreshlybakedFrenchbreadwithFrenchbutteriswhatmemoriesaremadeof.Takeachairinanancientwalledcityforamealwithaviewthatyouwillneverforget. Barcelona Thisbustlingcityfilledwithuniquebuildingsisacityforloversofhistoryarchitectureandfood.KioskoUniversalacounterrestaurantatonecomerofthemarketpreparessomeofthesimplestandbestfoodwe'veeverhad.Giveyourselfaweektoexploreandseceverythingthecityoffers.Thecityisnottobemissed. Italy It'shardtochooseoneplaceorcitytovisit.SomeofourfavoriteplacesincludethecoastalregionsontheAdriaticandTuscany.FriulistoleourheartslastyearwithitsmanyuniquewinessmallartisanfoodproducersandinfluencesfromneighboringcountrieslikeAustriaandGermany. MexicoCity FromunbelievablefoodmarketsandcasualstreetstandsMexicoCityhasbecometheplacetotravelforthefoodlovers.IfyouwanttoeatlocallyorderaHuracheastreetfoodspecialty.AllyouwillneedisalocalmicrobreworMezcal龙舌兰酒towashitdown. 21.Wherecanyoutastedeliciousfoodwhileenjoyingbeautifulscenery? A.SouthofFrance.B.Barcelona.C.Italy.D.MexicoCity. 22.WhatisKioskoUniversal? A.Amarket.B.Abutchershop.C.Arestaurant.D.Astreetstand. 23.WhatdoyouneedtohelpswallowHurachewheneatingit? A.Bread.B.Beer.C.Juice.D.Fruit. 24.Whatdothefourplaceshaveincommon? A.Theyaretouristattractions. B.Theyhaveancientbuildings. C.TheylieinEurope. D.Theyarenotedfortastyfood.
Hedidn'tmakeclearwhenandwherethemeetingwouldbeheld.A.this B.it C.that D.these
WhenCathleenGardiner'stwinswereborn17yearsagodoctorstoldherthattheywereapairinamillion.OnehadDownsyndrome低能综合症whiletheotherdidnot.HereCathleentellstheirtouchingstory. SinceSeanwasborn17yearsagoIhavealwaysthoughtthatheisjustaswonderfulashisbrotherandsister.Thoughhehadadisability残疾wehaveneverviewedhimasaburden.Hehasalwaysbeenablessing.Thedoctorsexplainedthatthoughtheyweretwinstheycamefromtwodifferenteggs.Lisacouldwalkat11monthsoldwhileSeandidn'ttakehisfirststepstillhewasthree.BytwoLisawastalkingalotbutSeanwasn'tabletospeakuntilhewasnearlyfour. ForthefirstfiveyearsofhislifeSeanneededagreatdealofcare.Lookingafterhimwasmyfull﹣timejobthoughIalsoworkedasatechnicaladviserinacomputingcompany.Wenevertreatedthemdifferently.Wegavethemthesametoysandspoketotheminthesameway.WeencouragedSeantokeepupwithLisaeventhoughhenevercouldandwewouldhelphimdevelophisabilities.WesentthemtothesameprimaryschoolevenafterdoctorsadvisedusthatSeanshouldgotoaschoolforthedisabled. WehadtoexplaintoLisathathewouldn'tlearnasquicklyasshewould.Shetoldusthatshe'dhelphimwithhisschoolwork.Havinganon﹣disabledtwinhasreallyhelpedSeandevelop.Thelovetheysharehasgivenhimagreatdealofsupport.NowSeanandLisaarebothabouttofinishhighschool.Idon'tthinkhewouldhavedonenearlyaswelltodaywithoutLisa'shelp. 1AtleasthowmanychildrendoesMrs.Gardinerhave? A.Two. B.Three. C.Four. D.One. 2Thethirdparagraphmainlytellsusthat. A.thecoupletreatedthetwinsequally B.CathleendidallshecouldtolookafterSean C.thecoupledidn'tfollowthedoctor'sadvice D.thecoupleencouragedSeantogrowup 3Allofthefollowingstatementsaretrueexcept. A.Seancouldn'tdevelopesowellwithouthisparents'greateffort. B.AsatwinsisterLisagaveSeanalotofhelp. C.AsamotherofadisabeledchildCathleenmusthavesufferedalot. D.CathleenlovedSeanmorethanLisabecauseofhisdisability. 4Thispassagetellsusthat. A.lovecandowonders B.nobodyisfoolishorclever C.beingstupiddoesn'tmatter D.allmenarebornequal
已知蜡烛的着火点约为190℃蜡烛的火焰由气态蜡燃烧形成．如图在温度什示数为280℃以上时快速推动活塞观察到蜡烛立即熄灭其主要原因是
Itisknowntousallthatwearedisturbedbypersonalaaffairsfromtimetotime.Asaseniormyfutureisalwaysonmymind.Tobeexactthoughtsofthefuturehavekeptmeupcountlessnightsandmademeworryenoughtodopoorlyinmorethanonetest.Becauseofthiswordsofwisdomareasourceofcomfort.SteveJobsgaveaspeechtoStanford'sgraduatingclassin2005andhiswordsresoundrepeatedlyinmymindwheneverIthinkaboutmyfuture. Itwasn'talwayslikethatthough.ItstartedWhenIbecameajuniorwhencollegecameintoview.It'sthefirstbigsteptomakingyourlifeyourown.SowhenJobsdiscussedhislifeasastudentsomefearswereeased.Hetoofelttheneedtoattendcollegetomakesomethingofhimself.Hefacedwhatmanyareextremelyafraidofuncertainty.Hislackofunderstandingcausedhimtostopattendingcollegeandfocusonwhathefeltwasimportant.Hisstoryhadahappyendingofcoursesincehecertainlyturnedoutwell. Thisdoesn'tmeanthatstudentsshouldn'tattendcollegebutratherthattheyshouldn'tworrysomuch.You'llgetwhereyouneedtogoevenifyourpathisabitmorewindingthanyou'dlike. Jobstalkedaboutthehardshipsinhiswork.Hisloveofhisworkhelpedhimcarryonandhegotwherehewasmeanttobewhichrestatesthepointdon'tpanic. Oneparticularpartofhisspeechstayedwithme.SteveJobsquotedthesayingStayhungrystayfoolishandithasbecomemymono.Stayingfoolishisrealizingthatyouarestillafoolnomatterhowmuchyou'velearnedorexperienced.Thereisalwaysmoretoexplore.Stayinghungryiswantingtofindthosethingsaboutwhichyouarestilluneducated. SteveJobs'slevelofsuccessisattainableandIamtoprovethat.Withthewillpowertogointotheworldlivingeverydaylikeit'smylastandallowingthefuturetotakecareofitselfIwilldogreatthings.InthelastmomentsofmylifeI'llbeproudofwhatIhavedoneandhopetohaveallthewisdomapersoncouldwishfor. 1Thepassageismainlyabout. A.anexperienceofaspeech B.themostimpressivequoteinlife C.amemorablemeetingwithJobs D.thewisdomdrawnfromaspeech 2WhatdidtheauthorgainfromJobs'sspeech? A.Braverytofaceuncertainties. B.Couragetodropoutofschool. C.ConfidenceindefeatingJobs. D.Interestincomputerindustry. 3ItissuggestedinParagraphsland2that. A.SteveJobsdidn'tattendcollege B.theauthorcaresmuchabouthisfuture C.SteveJobsfailedbecauseofhisdecision D.theauthorisacollegestudent 4Theauthorfeltworriedwhen. A.hehadtotaketestsatschool B.hehadlotsofsleeplessnights C.hethoughtabouthisfuture D.hesearchedforwordsofwisdom 5WhatdidNOTSteveJobsencouragestudentstodoinhisspeech? A.Havethedesiretolearnmore. B.Staycalminthefaceofhardships. C.Becontentwithwhattheyknow. D.Bemodestsoastolearnmore.
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pH是水质监测的重要指标之一下列水样酸性最强的是
假定你是英国某学校RossellSchool的交换生李华为了推广中国义化你所在的交流学校学生会将于2017年4月20日在学校报告厅举办中国诗词大会ChinesepoetryConference请你用英语写一则通知告知该校同学有关参赛事宜. 要点报名时间3月31日前 报名地点学生会办公室 比赛内容中国诗词以唐诗为主 奖品唐诗三百首 联系人及方式李华LH@qq.com. 注意1.词数100左右 2.可以适当增加细节以使行文连贯.
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SANFRANCISCO﹣Aphoneapp应用程序inSanFranciscogivesinformationaboutopenparkingspots.CityofficialsinSanFranciscointroducedtheapptotrytoreducetrafficjamsinthecitybutsomesayitraisessafetyconcerns. Inthiscitydriverssearchingforparkingspotsleadto30percentofalldowntownjamscityofficialsthink.NowSanFranciscohasfoundasolution﹣aphoneappforspot﹣seekersthatdisplaysinformationaboutareaswithavailablespaces.Thesystemintroducedlastmonthreliesonwirelesssensors感应器fixedinstreetsandcitygaragesthatcantellwithinsecondsifaspothasopenedup. MoniqueSoltaniaTVreportersaidsheandhersisterspent25minutesonFridaytryingtopark.Wewereprayingtotheparkinggodthatwe'dfindaspotshesaid.Ifwehadtheappwewouldnothavetopraytotheparkinggod.Butthesystemcouldcomewithseriousconsequences. Somepeoplesaythatdriverssearchingforparkingcouldendupfocusingontheirphonesnottheroad.Itcouldbereallydistracting使分心的saidDanielSimonsaprofessorofpsychologyattheUniversityofIllinois. Cityofficialsacknowledgethepotentialproblem.Theyareurgingdriverstopulloverbeforetheyusethecity'siPhoneapportodosobeforetheyleavehome.NathanielFordexecutivedirectoroftheSanFranciscoMunicipalTransportationAgencysaidsafetycouldactuallyimproveifdriversquicklyfoundaspotinsteadofcirclingandgettingfrustrated. SanFranciscohasputsensorsinto7000parkingspotsand12250spotsincitygarages.IfspacesinanareaopenupthesensorscommunicatewirelesslywithcomputersthatinturnmaketheinformationavailabletoappuserswithinaminutesaidMr.Fordofthetransportationagency.Ontheappamapshowswhichblockshavelotsofplacesblueandwhicharefullred. Morethan12000peoplehavedownloadedSanFrancisco'sappwhichisavailablenowonlyfortheiPhonebutwhichcityofficialssaytheyhopetobringtoallsimilardevices. Whenitisstartedupthecity'sparkingappwarnsdriversnottousethesystemwhileinmotion.Butsafetyadvocatessaidthatmightnotbesufficient.AfteralltheysaytextingwhiledrivingisillegalinCaliforniaandinmanystatesbutanumberofsurveysincludingonebythePewResearchCentershowthatmanyAmericansdoitanyway. ElizabethStampeexecutivedirectorofWalkSanFranciscoapedestrianadvocacygroupsaidshehopedthenewparkingappwouldleadtofeweraccidents. It'saninnovativeideashesaid.Thesafewayforpeopletousethedeviceisforthemtopulloverwhichtheyknowtheyshoulddo.Thequestioniswhethertheywill. ButMs.SoltanitheTVreportersaidusingtheappwouldprobablyjointhegroupofactivitiesalreadyperformedbydrivers. We'realreadylookingatGoogleMapsandFacebookonthephonewhilewedriveshesaid.Aren'twealwayslookingatsomethingonourphoneorchangingtheradioordrinkingcoffee?You'realwaysslightlydistractedwhenyou'redriving. 1Whatisthephoneappmentionedinthetextmainlyaimedat? A.Makingfulluseoftheparkingspots. B.Makingthetrafficflowsmoothly. C.Preventingtrafficaccidents. D.BenefitingiPhoneusers. 2AccordingtothetextSanFranciscocityofficials. A.don'tconsidertheappdistracting B.advisedriverstoparkcarsslowly C.areawareoftheapp'sdisadvantages D.believemoreparkingspotsareneeded 3Howdodriverslocatetheparkingspots? A.Sensors∀computers∀app. B.App∀computers∀sensors. C.Sensors∀app∀computers. D.Computers∀app∀sensors. 4Thephoneappmentionedinthetext. A.isabitslowinreacting B.hasn'tbeenputintoservice C.wasintroducedseveralyearsago D.can'tbedownloadedtoallphones 5WhichofthefollowingisTRUEaccordingtothetext? A.DanielSimonsthinkstheappconvenient. B.SanFranciscowillputmoresensorsintouse. C.Mostdriversopentheapponcetheystarttheircars. D.NathanielForddoesn'tdoubtthepracticaluseoftheapp. 6What'sthemainideaofthepassage? A.Safetyconcernsarevoicedaboutaphoneappaimedathelpingdriversfindparkingspots. B.Aphoneapphasbeenintroducedtorelievethepressureontrafficinthecity. C.Lookingforparkingspotscontributesgreatlytodowntowntrafficjams. D.Drivers'attentionisdistractedinonewayoranotherwhentheyaredriving.
Wecannotfigureoutquiteanumberofinsectsbirdsandanimalsaredyingout. A.that B.as C.why D.when
SomeMostCommonSeniorYearMistakes Almosteveryhighschoolseniormakessomemistakes.36.Findingabalancebetweenhavingfunandstudyingforyourcoursesisagreatwaytostartpreparingforcollegesinceyouwillbecalledupontodothisduringyourcollegeyears. Herewe'velistedsometopmistakesstudentsmakesothatyoucanmakesureyoudon'tmakethem. SkippingClasses Skippingclassescouldmeanmissingvaluableinformationforthecomingtests.37.Asisknowntoallinformationyou'llneedforyourmajorinyourcollegeprogrammaybecoveredduringahighschoollectureyoumiss. ForgettingtoStudy Whenyoufeellessmotivatedtostudyremindyourselfthateverygoodgradegetsyouclosertofindingacollegethatoffersagreatprograminthemajoryouwant.Keepyoureyesontheprize! 38 Tostayontopofyourassignmentscalculatehowlongyouthinksomethingwilltakeyouandthendoubleit.Thatwayyou'llhaveampletimetogetyourworkdone. DaydreamingaboutYourFutureTooMuch Yourmindnowmightbewanderingthinkingaroundaboutdegreesmajorspossiblecareersstudyabroadandmanyotherthings.Theseareallexcitingfuturepossibilitiesbutdon'tforgetthehereandnow.39 FailingtoUseAvailableResources 40 Andmanyofthemareniceenoughtoofferextrahelp.Thishelpcanbeintheformofextraofficehoursareviewoftopicscoveredstudyguidessampleexamsorothertoolstohelpyouimproveyourgrade.Takeadvantageofthem. A.MismanagingYourTime B.Startpreparingforcollege C.Yoursenioryearofhighschoolisabusytime D.Anddon'tforgettothinkaheadtouniversityclasses E.Teachersknowaboutallthechallengesyou'refacing F.You'dbetterfindouthowtoavoidthesecommonmistakes G.Spendingtoomuchtimedaydreamingcouldseriouslylimitthosefutureplans.
Idon'tthinkthereisaggapbetweenusbecauseI'mjusttwoyearsolderthanyou.
Acomputercanonlydoyouhaveinstructedittodo. A.how B.after C.what D.when
要除去下列物质中的少量杂质括号内为杂质下列实验方案设计中不合理的是
下列物质的名称俗名化学式及用途完全对称的是
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