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用脱脂棉包住约0.2g过氧化钠粉末，置于石棉网上，往脱脂棉上滴水，可观察到脱脂棉剧烈燃烧起来。 由上述实验现象所得出的有关过氧化钠跟水反应的结论是：第一，有氧气生成；第二，（）。过氧化钠跟水反...
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过氧化钠Na2O2是一种淡黄色固体能与水反应常用在呼吸面具和潜水艇里作为氧气的来源还可用作熔矿剂使某
1除去混在CO2中的少量HCl气体通常用NaHCO3溶液其离子方程式为_______________
用脱脂棉包住约0.2g过氧化钠粉末置于石棉网上往脱脂棉上滴水可观察到脱脂棉剧烈燃烧起来1由上述实验现
化学活动课上老师给同学们表演了一个水能生火的魔术如右图所示他将包有过氧化钠Na2O2粉末的脱脂棉放在
过氧化钠Na2O2是一种淡黄色固体能与水反应常用在呼吸面具和潜水艇里作为氧气的来源还可用作熔矿剂使某
过氧化钠Na2O2是一种淡黄色固体能与水反应常用在呼吸面具和潜水艇里作为氧气的来源还可用作熔矿剂使某
过氧化钠Na2O2是一种淡黄色固体能与水反应常用在呼吸面具和潜水艇里作为氧气的来源还可用作熔矿剂使某
实验用脱脂棉包住约0.2g过氧化钠粉末置于石棉网上往脱脂棉上滴水观察到脱脂棉剧烈燃烧起来.1由上述实
用脱脂棉包住约0.2g过氧化钠粉末置于石棉网上往脱脂棉上滴水可观察到脱脂棉剧烈燃烧起来 中往
用脱脂棉花包住约0.2g过氧化钠粉末置于石棉网上往脱脂棉上滴水可观察到脱脂棉剧烈燃烧起来.1由实验现
化学活动课上老师给同学们表演了一个水能生火的魔术如图所示他将包有过氧化钠Na2O.2粉末的脱脂棉放在
某研究性学习小组做了一个滴水生火的趣味实验用脱脂棉包住适量的过氧化钠Na2O2固体粉末置于石棉网上然
用脱脂棉包住0.2g过氧化钠粉末置于石棉网上往脱脂棉上滴几滴水可观察到脱脂棉剧烈燃烧起来.1由上述实
用脱脂棉包住约0.2g过氧化钠固体粉末置于石棉网上然后向包有过氧化钠的位置滴加少量水结果脱脂棉剧烈燃
1化学活动课上老师给同学们表演了一个水能生火的魔术如图所示他将包有过氧化钠Na2O.2粉末的脱脂棉放
用脱脂棉包住约0.2g过氧化钠固体粉末置于石棉网上然后向包有过氧化钠的位置滴加几滴水结果脱脂棉剧烈燃
用脱脂棉包住约0.2g过氧化钠粉末置于石棉网上往脱脂棉上滴水可观察到脱脂棉剧烈燃烧起来 某研
1除去混在CO2中的少量HCl气体通常用NaHCO3溶液其离子方程式为_______________
用脱脂棉包住约0.2g过氧化钠粉末置于石棉网上往脱脂棉上滴水可观察到脱脂棉剧烈燃烧起来1由上述实验现
水能灭火也能生火李老师给同学们表演了水能生火的魔术如图他将包有过氧化氢Na2O2粉末的脱脂棉放在石棉
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DuringthesummerholidayIthinkIshoulddosomething61.______meaningfulinsteadtouring.SoIgotajobatafast-food62.______restaurantandworkedthereascleaner.Iworked7hoursaday63.______forthreeweeks.Thejobwashardandboredandseemedendless.64.______ItmademesotiredthatInearlystoppedithalfway.65.______AfterallIstucktoitwithdeterminations.EverydayIstarted66.______offforworkearlyinthemorningandwenttohomelateinthe67.______evening.FinallyIfinishedthejobafterthenewschoolterm68.______began.NowIunderstandthatlabormeans.Ithinkitisreally69.______asuccessfulexperiencewhichisworthrememberingforever.70.______
EightDaysfromjust￡299DepartsMay—October2005Includes:·Returnflightsfrom8UKairportstoNaples·Returnairporttohoteltransport·Sevennights’accommodationatthe3*HotelNice·Theservicesofguides·GovernmenttaxesJoinusforawonderfulholidayinoneofEurope’smostwonderfulcorners.IndeedtheancientRomanscalledtheareahappyland—thissimplyattractivecoastlineofcolourfultownssplendidviewsandthewarmMediterraneanSeaisaperfectchoiceforatrulymemorableholiday!ChoosebetweenthepeacefultraditionalvillageofSant’AgatasetonahillsidesixmilesfromSorrentoorthemorelivelyandwell-knowninternationalresort旅游胜地townofSorrentowithwonderfulviewsovertheBayofNaples.Breathtakingsceneryandfamoussightseverywhere.FromthelegendaryIsleofCapritothehauntingruinsofPompeiiandfromtheunforgettableAmalfiDrivetothedelightfulresortsofPositanoSorrentoandRavellotheareaisafeastfortheeyes!Shouldyouchoosetojoinusweknowthatyouwouldnotbedisappointed!Withachoiceofhotelsandoptionalexcursions可选择的旅游线路includingCapriPompeiiandtheAmalfiDrivethisisatrulyunmissableholiday.·Pricebasedontwotouristssharingatwin/doubleroomattheHotelNice.LiketoknowmoreThentelephoneNewmarketAirHolidaysLtdon:0845-226-7766Allcallschargedatlocalrates.Whatisthepurposeofthepassage
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Oneofthemostremarkablethingsaboutthehumanmindisourabilitytoimaginethefuture.Inour21wecanseewhathasnotyethappened.Forexamplewhilewearelookingforwardto22anewplaceorcountrywe23whatitwillbelike.Wepredict预料the24peoplewilleatdressandact.Ofcoursewedonotalwayspredictthings25.Thingsareoftenverydifferentfromthewaywe26themtobe.Oneofthe27dreamsinhistoryisthedreamoftheGermanscientistKekulewhohadbeen28toworkoutaverydifficultprobleminphysics.Hehad29andanalyzed分析theproblemfromeveryangle角度fordaysbutthere30tobenowayof31outtheanswer.Thenonenighthewenttobedanddreamed.Whenhe32upherealizedthatheknewtheanswer.Hehadsolvedtheprobleminhis33.Thehypnotist催眠者satinthechairoppositehimandspoke34:Iwantyoutoconcentrateonmyvoice.Thinkabout35.Youknownothingbutmyvoice.Andasyoupayattentiontomyvoiceyour36willgetheavier.Soonyou’llbeasleep.Youwillhearmyvoiceand37mywordsbutyourbodywillbeasleepyoureyesaretooheavy.Youare38asleepandwhenyouwakeupyouwill39nothing.Youwillforgeteverything.NowIamgoingto40slowlyfromonetofive.Onetwothreefourfive.Ⅱ．完形填空/Cloze
ThedaysofthehunterarealmostoverinIndia.Thisispartlybecausethereispracticallynothinglefttokillandpartlybecausesomestepshavebeentakenmainlybybanningtiger-shootingtoprotectthoseanimalswhichstillsurvive.SomepeoplesaythatManisnaturallyahunter.Idisagreewiththisview.Surelyourearliestforefatherswhoatfirstpossessednoweaponsspenttheirtimediggingforrootsandwerenodoubtthemselvesoftenhuntedbymeat-eatinganimals.Ibelievethemainreasonwhythemodernhunterkillsisthathethinkspeoplewilladmirehiscourageinoverpoweringdangerousanimals.Ofcoursetherearesomewhotrulybelievethatthekillingisnotreallytheimportantthingandthatthechiefpleasureliesinthejoyofthehuntandthebeautiesofthewildcountryside.Therearealsothoseforwhomhuntinginfactoffersachancetoprovethemselvesandriskdeathbydesign;thesemengooutafterdangerousanimalsliketigerseveniftheysaytheyonlydoittoridthecountrysideofathreat.Icanrespectreasonslikethesebuttheyareclearlydifferentfromtheneedtostrengthenyourhighopinionofyourself.Thegreatestbig-gamehuntersexpressedintheirwritingssomethingofthesefinermotives动机.Oneofthemwrote:Youmustproperlyrespectwhatyouareafterandshootitcleanlyandontheanimal’sownterritory领地.Youmustfixforeverinyourmindallthewondersofthatparticularday.Thisisbetterthanlettinghimgrowafewyearsoldertobeattackedandwoundedbyhisownsonandeventuallyeatenhalfalivebyotheranimals.Huntingisnotacruelandsenselesskilling—notifyourespectthethingyoukillnotifyoukilltoenrichyourmemoriesnotifyoukilltofeedyourpeople.Icanunderstandsuchbeliefsandcancomparethesehunterswiththosewhohuntedlionswithspears矛andbravelycaughtthembythetail.Butthisisverydifferentfrommanytiger-shootsIhaveseeninwhichmodemweaponswereused.Theso-calledhuntersfiredfromtalltreesorfromthebacksoftrainedelephants.Suchmethodsmadetigersseemnomoredangerousthanrabbits.Theauthorthinksmodernhunterskillmainly______.
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Anyonewhocaresaboutwhatschoolsandcollegesteachandhowtheirstudentslearnwillbeinterestedinthememoir回忆录ofRalphW.TylerwhoisoneofthemostfamousmeninAmericaneducation.BorninChicagoin1902broughtupandschooledinNebraskathe19-year-oldcollegegraduateRalphTylerbecamehookedonteachingwhileteachingasascienceteacherinSouthDakotaandchangedhismajorfrommedicinetoeducation.GraduateworkattheUniversityofChicagofoundhimconnectedwithhonorableeducatorsCharlesJuddandW.W.Charterswhoseideasofteachingandtestinghadaneffectonhislaterwork.In1927hebecameateacherofOhioStateUniversitywherehefurtherdevelopedanewmethodoftesting.Tylerbecamewell-knownin1938whenhecarriedhisworkwiththeEight-YearStudyfromOhioStateUniversitytotheUniversityofChicagoattheinvitationofRobertHutchins.TylerwasthefirstdirectoroftheCenterforAdvancedStudyintheBehavioralSciencesatStanfordapositionheheldforfourteenyears.Therehefirmlybelievedthatresearchersshouldbefreetoseekanindependent独立的spiritintheirwork.AlthoughTylerofficiallyretiredin1967heneveractuallyretired.HeservedonalonglistofeducationalorganizationsintheUnitedStatesandabroad.Eveninhis80shetraveledacrossthecountrytoadviseteachersandmanagementpeopleonhowtosetobjectives目标todevelopthebestteachingandlearningwithintheirschools.Tylerissaidtohaveneveractuallyretiredbecause______.
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在2008年北京奥运会上中国著名运动员刘翔因脚伤退出比赛引起人们的广泛争议下面是新浪网站的一项调查运动员受伤后应该坚持还是应该退出选项名称投票数百分比趋势应该退出健康比金钱重要22229234.77%上升运动场就是战场刘翔应该坚持12375219.36%上升请你结合上表写一篇英语短文谈谈自己的看法词数120词左右
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Oneofthemostremarkablethingsaboutthehumanmindisourabilitytoimaginethefuture.Inour21wecanseewhathasnotyethappened.Forexamplewhilewearelookingforwardto22anewplaceorcountrywe23whatitwillbelike.Wepredict预料the24peoplewilleatdressandact.Ofcoursewedonotalwayspredictthings25.Thingsareoftenverydifferentfromthewaywe26themtobe.Oneofthe27dreamsinhistoryisthedreamoftheGermanscientistKekulewhohadbeen28toworkoutaverydifficultprobleminphysics.Hehad29andanalyzed分析theproblemfromeveryangle角度fordaysbutthere30tobenowayof31outtheanswer.Thenonenighthewenttobedanddreamed.Whenhe32upherealizedthatheknewtheanswer.Hehadsolvedtheprobleminhis33.Thehypnotist催眠者satinthechairoppositehimandspoke34:Iwantyoutoconcentrateonmyvoice.Thinkabout35.Youknownothingbutmyvoice.Andasyoupayattentiontomyvoiceyour36willgetheavier.Soonyou’llbeasleep.Youwillhearmyvoiceand37mywordsbutyourbodywillbeasleepyoureyesaretooheavy.Youare38asleepandwhenyouwakeupyouwill39nothing.Youwillforgeteverything.NowIamgoingto40slowlyfromonetofive.Onetwothreefourfive.Ⅱ．完形填空/Cloze
DependingontheoutcomeofnegotiationsCaspianAirofferflightstoBerlinandCopenhagenfromKovaAirport.
WhatdoyouwanttobewhenyougrowupAteacherAdoctorHowaboutanicecreamtasterYestherereallyisajobwhereyoucangetpaidtotasteicecream.JustaskJohnHarrisonanOfficialTasteTesterforthepast21years.Testinghelpsmanufacturerstobesureofaproduct’squality.DuringhiscareerHarrisonhasbeenresponsibleforapprovinglargequantitiesofthesweeticecream—aswellasfordevelopingover75flavors味道.Somepeoplethinkthatitwouldbeeasytodothisjob:afterallyoujusthavetolikeicecreamrightNo—there’smoretothejobthanthatsaysHarrisonwhohasadegreeinchemistry.Hepointsoutthatadairyorfood-sciencedegreewouldbeveryusefultosomeonewantingacareerinthiscoolfield.InatypicalmorningonthejobHarrisontastesandassesses60ice-creamsamples.Heletstheicecreamwarmuptoabout12℉.HarrisonexplainsYougetmoreflavorfromwarmericecreamwhichiswhysomekidsliketostiritcreatingice-creamsoup.WhiletheicecreamwarmsupHarrisonlooksoverthesamplesandgradeseachoneonitsappearance.Tastingbeginswiththeeyesheexplains.HecheckstoseeiftheicecreamisattractiveandaskshimselfDoestheproducthavethecolorexpectedfromthatnavor.Nextit’stimetotaste!ContinuingtothinkupnewideastryoutnewflavorsandtestsamplesfromsomanykindsoficecreameachdaykeepsHarrisonbusybuthappy—workingatonecooljob.AccordingtoJohnHarrisontobequalifiedinthecoolfielditishelpfulto______.
DuringthesummerholidayIthinkIshoulddosomething61.______meaningfulinsteadtouring.SoIgotajobatafast-food62.______restaurantandworkedthereascleaner.Iworked7hoursaday63.______forthreeweeks.Thejobwashardandboredandseemedendless.64.______ItmademesotiredthatInearlystoppedithalfway.65.______AfterallIstucktoitwithdeterminations.EverydayIstarted66.______offforworkearlyinthemorningandwenttohomelateinthe67.______evening.FinallyIfinishedthejobafterthenewschoolterm68.______began.NowIunderstandthatlabormeans.Ithinkitisreally69.______asuccessfulexperiencewhichisworthrememberingforever.70.______
Billboardsgraffititrashandtangledtelephonewirescantovisualpollution.
Oneofthemostremarkablethingsaboutthehumanmindisourabilitytoimaginethefuture.Inour21wecanseewhathasnotyethappened.Forexamplewhilewearelookingforwardto22anewplaceorcountrywe23whatitwillbelike.Wepredict预料the24peoplewilleatdressandact.Ofcoursewedonotalwayspredictthings25.Thingsareoftenverydifferentfromthewaywe26themtobe.Oneofthe27dreamsinhistoryisthedreamoftheGermanscientistKekulewhohadbeen28toworkoutaverydifficultprobleminphysics.Hehad29andanalyzed分析theproblemfromeveryangle角度fordaysbutthere30tobenowayof31outtheanswer.Thenonenighthewenttobedanddreamed.Whenhe32upherealizedthatheknewtheanswer.Hehadsolvedtheprobleminhis33.Thehypnotist催眠者satinthechairoppositehimandspoke34:Iwantyoutoconcentrateonmyvoice.Thinkabout35.Youknownothingbutmyvoice.Andasyoupayattentiontomyvoiceyour36willgetheavier.Soonyou’llbeasleep.Youwillhearmyvoiceand37mywordsbutyourbodywillbeasleepyoureyesaretooheavy.Youare38asleepandwhenyouwakeupyouwill39nothing.Youwillforgeteverything.NowIamgoingto40slowlyfromonetofive.Onetwothreefourfive.Ⅱ．完形填空/Cloze
Oneofthemostremarkablethingsaboutthehumanmindisourabilitytoimaginethefuture.Inour21wecanseewhathasnotyethappened.Forexamplewhilewearelookingforwardto22anewplaceorcountrywe23whatitwillbelike.Wepredict预料the24peoplewilleatdressandact.Ofcoursewedonotalwayspredictthings25.Thingsareoftenverydifferentfromthewaywe26themtobe.Oneofthe27dreamsinhistoryisthedreamoftheGermanscientistKekulewhohadbeen28toworkoutaverydifficultprobleminphysics.Hehad29andanalyzed分析theproblemfromeveryangle角度fordaysbutthere30tobenowayof31outtheanswer.Thenonenighthewenttobedanddreamed.Whenhe32upherealizedthatheknewtheanswer.Hehadsolvedtheprobleminhis33.Thehypnotist催眠者satinthechairoppositehimandspoke34:Iwantyoutoconcentrateonmyvoice.Thinkabout35.Youknownothingbutmyvoice.Andasyoupayattentiontomyvoiceyour36willgetheavier.Soonyou’llbeasleep.Youwillhearmyvoiceand37mywordsbutyourbodywillbeasleepyoureyesaretooheavy.Youare38asleepandwhenyouwakeupyouwill39nothing.Youwillforgeteverything.NowIamgoingto40slowlyfromonetofive.Onetwothreefourfive.Ⅱ．完形填空/Cloze
ThedaysofthehunterarealmostoverinIndia.Thisispartlybecausethereispracticallynothinglefttokillandpartlybecausesomestepshavebeentakenmainlybybanningtiger-shootingtoprotectthoseanimalswhichstillsurvive.SomepeoplesaythatManisnaturallyahunter.Idisagreewiththisview.Surelyourearliestforefatherswhoatfirstpossessednoweaponsspenttheirtimediggingforrootsandwerenodoubtthemselvesoftenhuntedbymeat-eatinganimals.Ibelievethemainreasonwhythemodernhunterkillsisthathethinkspeoplewilladmirehiscourageinoverpoweringdangerousanimals.Ofcoursetherearesomewhotrulybelievethatthekillingisnotreallytheimportantthingandthatthechiefpleasureliesinthejoyofthehuntandthebeautiesofthewildcountryside.Therearealsothoseforwhomhuntinginfactoffersachancetoprovethemselvesandriskdeathbydesign;thesemengooutafterdangerousanimalsliketigerseveniftheysaytheyonlydoittoridthecountrysideofathreat.Icanrespectreasonslikethesebuttheyareclearlydifferentfromtheneedtostrengthenyourhighopinionofyourself.Thegreatestbig-gamehuntersexpressedintheirwritingssomethingofthesefinermotives动机.Oneofthemwrote:Youmustproperlyrespectwhatyouareafterandshootitcleanlyandontheanimal’sownterritory领地.Youmustfixforeverinyourmindallthewondersofthatparticularday.Thisisbetterthanlettinghimgrowafewyearsoldertobeattackedandwoundedbyhisownsonandeventuallyeatenhalfalivebyotheranimals.Huntingisnotacruelandsenselesskilling—notifyourespectthethingyoukillnotifyoukilltoenrichyourmemoriesnotifyoukilltofeedyourpeople.Icanunderstandsuchbeliefsandcancomparethesehunterswiththosewhohuntedlionswithspears矛andbravelycaughtthembythetail.Butthisisverydifferentfrommanytiger-shootsIhaveseeninwhichmodemweaponswereused.Theso-calledhuntersfiredfromtalltreesorfromthebacksoftrainedelephants.Suchmethodsmadetigersseemnomoredangerousthanrabbits.Whatistheauthor’sviewonthetiger-shootshehasseen
Anyonewhocaresaboutwhatschoolsandcollegesteachandhowtheirstudentslearnwillbeinterestedinthememoir回忆录ofRalphW.TylerwhoisoneofthemostfamousmeninAmericaneducation.BorninChicagoin1902broughtupandschooledinNebraskathe19-year-oldcollegegraduateRalphTylerbecamehookedonteachingwhileteachingasascienceteacherinSouthDakotaandchangedhismajorfrommedicinetoeducation.GraduateworkattheUniversityofChicagofoundhimconnectedwithhonorableeducatorsCharlesJuddandW.W.Charterswhoseideasofteachingandtestinghadaneffectonhislaterwork.In1927hebecameateacherofOhioStateUniversitywherehefurtherdevelopedanewmethodoftesting.Tylerbecamewell-knownin1938whenhecarriedhisworkwiththeEight-YearStudyfromOhioStateUniversitytotheUniversityofChicagoattheinvitationofRobertHutchins.TylerwasthefirstdirectoroftheCenterforAdvancedStudyintheBehavioralSciencesatStanfordapositionheheldforfourteenyears.Therehefirmlybelievedthatresearchersshouldbefreetoseekanindependent独立的spiritintheirwork.AlthoughTylerofficiallyretiredin1967heneveractuallyretired.HeservedonalonglistofeducationalorganizationsintheUnitedStatesandabroad.Eveninhis80shetraveledacrossthecountrytoadviseteachersandmanagementpeopleonhowtosetobjectives目标todevelopthebestteachingandlearningwithintheirschools.ThewordshookedonteachingunderlinedinParagraph2probablymean______.
______可以肯定thathewillgetoverhisillnesssoon.certain
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