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在“探究凸透镜成像的规律”的实验中： （1）如图所示，若将蜡烛向左移，为了继续在光屏上观察到清晰的像，应将光屏向 移．不断调整烛焰和光屏的位置，我们会发现，凸透镜成放大的像时，物距跟像距比，...
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在探究凸透镜成像规律的实验中当烛焰凸透镜光屏处于如图所示的位置时恰能在光屏上得到一个清晰的像.利用这
投影仪
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在做探究凸透镜成像规律实验时东风同学发现光具座上标尺的刻度范围是0-100cm如图所示而实验室只有两
探究凸透镜成像的规律实验装置如图所示1实验室中有两只焦距不同的凸透镜A.焦距为10cmB.焦距为30
在探究凸透镜成像规律的实验中已知凸透镜的焦距为10cm如图所示小刚同学计划将蜡烛有远到近逐渐向透镜移
在探究凸透镜成像规律的实验中蜡烛凸透镜和光屏在如图所示的位置时光屏上出现了烛焰清晰的像则所成的像是
倒立、放大的实像
倒立、缩小的实像
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如图所示甲乙分别是探究平面镜成像特点和探究凸透镜成像规律的实验装置1在探究平面镜成像特点的实验中拿一
在探究凸透镜成像规律的实验中凸透镜焦距为10cm当蜡烛透镜光屏处在如图所示的位置时烛焰在光屏上成清晰
在探究凸透镜成像规律实验中.1实验时应使烛焰凸透镜光屛的中心在2当凸透镜光屛和烛焰的位置如图所示时光
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如图所示甲乙分别是探究平面镜成像特点和探究凸透镜成像规律的实验装置.1在探究平面镜成像的特点实验中拿
如图所示甲乙分别是探究平面镜成像特点和探究凸透镜成像规律的实验装置1在探究平面镜成像特点的实验中拿一
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15分ChelseaHeywhatwereyouwatchingjustnow?Soundedsomethingfullof56violent. HeatherItissometimes.ThatwasSherlockthatnewBritishseries.I'veneverseenanythinglikethisshow.Ithasgoteverythingdramaactionmysteryandevensomecomedy.It'stheall﹣in﹣oneshow. ChelseaI57thinkallBritishdramasweredismal沉闷无趣的affairs. HeatherIdidtoo.ButIguessthat'sanoldstereotype.ThisTVshowisveryinteresting.Youwillloveit58immediateyouwatchit.Youcanaddit59yourlist.BritishpeopleusedtolookdownuponAmericanshows.TheysawAmericanTVasshallowandcheap.Iwonder60thecommercialshadanythingtodowiththat? ChelseaProbably.Idohate61whenthereisagoodstory62interruptbyannoyingadvertisements.Buttimeshavechanged.NowAmericanTVisturningheadsaroundtheworldandBritishTVhas63reputationforbeingdull. HeatherMaybethat'sbecausenobodyelsegetsBritishhumor. ChelseaMaybe.ButifSherlockis64goodasyousayitismaybethere'ssomenewlifeinBritishTV. HeatherTherecertainlyis!Thewritingisgoodthestoryisfunandthecastingisperfect.Theactorsreallyfitthe65character!
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30分LastSundayIsatwithTonymycollegeclassmateinawell﹣knowncoffeeshopinBuenosAiresArgentina.Aswe1ourcoffeetwomenenteredandsatonanemptytablebesideus. They2thewaiterandorderedthreecupsof3twoonthetableandoneonthewall.Weheardthisorderwithgreat4andobservedthattheywereservedwithtwocupsofcoffee5theypaidforthree.Assoonasthey6thewaiterpastedapieceofpaperonthewallsayingACupofCoffee. It7thatthesituationwasnormalatthisplace.Howeveritwassomething8forTonyandme.Sincewehadnothingtodowiththesituationwe9ourcoffeepaidthebillandleft. Afterafewdaysweagainhada10togotothiscoffeeshop.Whilewewereenjoyingourcoffeeamanentered.Thewaythismanwasdresseddidnot11thestandardnortheatmosphereofthiscoffeeshop.Povertywas12fromthelooksonhisface.Ashe13himselfhelookedatthe14andsaidOnecupofcoffeefromthewall.thewaiterservedcoffeetothismanwith15politenessandwarmth. Afterafewminutesthemanfinishedhiscoffeeandleft16paying.Wewereamazedtowatchallthiswhenthewaiter17apieceofpaperfromthewalland18itinthedustbin. Nowitwasno19forusbecausethesituationwaseasytounderstand.Althoughthemandidn'tknowabouttheonewhowasgivingthiscupofcoffeetohimhewouldhaveabetterunderstandingofthewallwhichhadagreatrolebetweenthe20andthereceiver. 1A.enjoyed B.warmed C.cooked D.booked 2A.thanked B.met C.called D.found 3A.water B.coffee C.tea D.milk 4A.pride B.courage C.hope D.interest 5A.as B.but C.so D.for 6A.moved B.came C.left D.entered 7A.happened B.proved C.seemed D.sounded 8A.special B.normal C.kind D.helpful 9A.prepared B.ordered C.changed D.finished 10A.chance B.way C.right D.choice 11A.win B.match C.equal D.raise 12A.clear B.quick C.exact D.strange 13A.dressed B.knew C.introduced D.seated 14A.menu B.wall C.table D.door 15A.pity B.calm C.fear D.respect 16A.over B.after C.without D.against 17A.tookoff B.tookup C.tookover D.tookin 18A.hid B.lost C.threw D.picked 19A.idea B.surprise C.delight D.decision 20A.boss B.guest C.waiter D.giver
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30分MyfamilylivesinLasVegaswhereIcanhardlyrememberthelasttimeitsnowed.Wealsodidn'tgetthe1ofthemenwhohelpedusduringthelastsnowstorm. Wehadbeen2throughAlbuquerqueNewMexicofromTexasafteraweekofvisitingfamilyandfriendsafter15yearsofnotseeingthem.Suddenlywe3itwassnowingandsoonaswegotclosertoAlbuquerque4snowpileslitteredthesidesoftheroad. Wehadaquick5atClinesCornersRestAreaandgotbackontheroadagain.Slowlywedroveontothesnow﹣filledhighway.Atfirstithadseemedlikewewould6itandwealmostdid.Rightattheedgeofthehighwaywegotstuckinthesnow.MysisterandIgotouttotryandpushthecarbutthatdidn'twork.Inthewordsofmysisterthisishowhorrormovies7. Thankgoodnessitwasn'tso8thattherewerecarsontheroad.Atfirstweusedourbarehandstotryand9acartohelpus.ThedriverlookedatusandunfortunatelycontinueddrivingbutIunderstood.Itseemedhewasalsoona10withhisfamily.Thenwesawanothercarandgrabbedourphonesand11themwiththeflashlightson. AmaninatruckaboutthesameheightasIam12inhisearly30sstoppedtohelpus.Despitehimnothavingany13hestilltriedtohelpuspushourcarbackontotheroad. Afterseveralattemptsanothertrucksawus.Itpassedusbutsomeoneinit14thedrivertobackupandhelp.TwowhitementallerthanIprobablyalsointheir30sgot15andgrabbedtheirshovel铁锹.Theyknewexactlywhattodoshovelingthesnowandrevealingapathwayofpavementforourtirestodriveon.Theyeveninstructedmydadtoslowlyspeedup.Withtheirhelpourcar16madeitbackontheroad. I'mreally17toyouthreewhohelpedmyfamily.18wedidn'tgetyournamesIhopethatsomehowthispieceofwriting19youandyouunderstandthatyousavedmyfamilyandtwodogsfromapotentiallylife﹣threatening20. 1A.jobs B.hobbies C.names D.addresses 2A.driving B.walking C.flying D.running 3A.believed B.noticed C.mentioned D.felt 4A.different B.tidy C.shiny D.huge 5A.move B.look C.try D.stop 6A.catch B.make C.avoid D.challenge 7A.start B.continue C.stay D.spread 8A.fast B.slow C.late D.early 9A.power B.signal C.book D.view 10A.campaign B.trial C.mission D.trip 11A.called B.dropped C.waved D.tested 12A.perhaps B.mostly C.otherwise D.therefore 13A.tools B.sense C.food D.beliefs 14A.inspired B.allowed C.persuaded D.encouraged 15A.in B.on C.up D.out 16A.nearly B.really C.finally D.totally 17A.joyful B.unselfish C.friendly D.grateful 18A.Unless B.Although C.Since D.If 19A.reaches B.entertains C.informs D.changes 20A.mistake B.situation C.warning D.stage
称取一定质量的氯酸钾和二氧化锰的混合物放入大试管中加热至质量不再变化为止．实验测得固体混合物质量随加热时间变化的相关数据如图所示．请计算 1生成氧气多少克 2求原混合物中氯酸钾的质量分数．
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尿素[CONH22]是含氮量较高的氮肥．工业上以CO2等物质为原料合成尿素发生反应的化学方程式为CO2+2X＝CONH22+H2O其中X的化学式是
12.5分An80﹣year﹣oldmanwassittingonthesofainhishousealongwithhis45﹣year﹣oldhighlyeducatedson.Suddenlyacrow乌鸦perchedonthetreeneartheirwindow.ThefatheraskedhissonWhatisthis?ThesonrepliedItisacrow.AfterafewminutesthefatheraskedhissonthesecondtimeWhatisthis?ThesonsaidFatherIhavejustnowtoldyouIt'sacrow.AfteralittlewhiletheoldfatheragainaskedhissonthethirdtimeWhatisthis?It'sacrowacrowacrow.saidthesonloudly.AlittleafterthefatheragainaskedhissonthefourthtimeWhatisthis?ThistimethesonshoutedathisfatherWhydoyoukeepaskingmethesamequestionagainandagain?'ITISACROW'.Areyounotabletounderstandthis? Alittlelaterthefatherwenttohisroomandcamebackwithanolddiarywhichhehadkeptsincehissonwasborn.Onopeningapageheaskedhissontoreadthatpage.Whenthesonreaditthefollowingwordswerewritteninthediary Todaymylittlesonagedthreewassittingwithmeonthesofawhenacrowwasthereonthewindow.Mysonaskedme23timeswhatitwasandIrepliedtohimall23timesthatitwasacrow.Ihuggedhimlovinglyeachtimeheaskedmethesamequestionagainandagainfor23times.IdidnotatallfeelannoyedIratherfeltaffectionformyinnocentchild. 1Whatdoestheunderlinedwordperchedmeaninthepassage? A.dropped B.struck C.rested D.knocked 2InwhattonedidthesonsaytohisFatherIt'sacrowacrowacrow.? A.impatient. B.hurried. C.worried. D.surprised. 3WhydidtheFatheraskthesamequestionagainandagain? A.Becausehewantedtoseethereactionofhisson. B.Becausehewastoooldtorememberanything. C.Becausehewantedtomakehissonangry. D.Becausehecouldn'tunderstandwhathissonsaid. 4Howoldwastheoldmanwhenhissonaskedhim23timesWhatisthis? A.80yearsold. B.45yearsold. C.38yearsold. D.42yearsold. 5Thewritermainlyintendsto. A.tellusthefunctionofadiaiy B.teachuswhatacrowis C.callonustoloveourparents D.introduceapairofsonandfather
用相关序号填空生活中经常接触到下列物质 A．蛋白质B．碳酸钠C．活性炭D．硫酸铜E．盐酸F．天然气 1常用作洗涤剂的是 2可用于吸附异味的是 3豆浆中的主要营养物质是 4常用于金属除锈的是 5常用于游泳池消毒的是 6常用于家庭燃料的是．
下列物质属于混合物的是
25分概要写作.阅读下面短文根据其内容写一篇60词左右的内容概要. AccordingtoastudyattheUniversityofMarlandMedicalCenterinBaltimoreresearchersfoundthatpeoplewhohadagoodsenseofhumorandlaughedalotnotonlyathomebutalsoatworkhadfewerheartproblemsthanpeoplewholaughedlessandlaughingpeopletendtolivealongerlifethantheoneswhoarenot. AfterreadingplentyofinformationaboutthebenefitsoflaughingandacarefulstudyofpreviouspapersinthisareaadoctorinIndiastartedalaughterclub.Dr.MandanDamaris'slaughterclubquicklygrewinto1800groupsthroughoutIndiaandover6000aroundtheworld.ThelaughterclubhadeveninspiredWorldLaughterDaywhichpeoplecelebrateonthefirstSundayofMayeveryyear.InstructorsattheclubsgetpeoplelaughingnotonlythroughjokesbutthroughsimplelaughingexercisesForexampleinstructorsandparticipantsrepeatthechantho﹣ho﹣hoandha﹣ha﹣hatogether.What'smoreparticipantsalsodotheLionlaughbystickingouttheirtonguesandwavingtheirhandsaroundtheirears.Otherexercisesfocusonbreathingandsimpleyogaexercises.Inawordalltheactivitiesthatcancauselaughareincludedintheclubs. TheselaughterclubsareverypopularinhospitalsandnursinghomesnowadaysinIndiawhereparticipantscanforgetabouttheirachesandpainswhilelaughing.Itseemsthatlaughingmaybejustasimportantaseatingrightandexercising. Noteveryonecanjoinalaughterclubbutweallcantakepartinthesamepractice.Accordingtothedoctorbesidestakingpartintheclubseveryonecandosomethingtomakethemselveslaugh.Howcanyoumakelaughingapartofyourdailyroutine?Ifyoufeelfunnyaboutjoiningalaughterclubyoucanrentafunnymovierememberafunnyexperiencedosomesportsgotothezoowatchthemonkeysorevenjustmakeyourselflaugh.Youwillnotbeabletokeepastraightfaceallthetime. Sodon'tworrybehappy.Laughalittleandlivelonger. .
15分假设你是红星中学高三学生李华请给你校外教Jim写一封邮件邀请他参加你校即将举办的校史展.邮件的内容包括 1.介绍校史展的相关信息时间地点和主要内容等 2.说明邀请原因 3.询问对方意向. 注意1.词数不少于50 2.开头和结尾已给出不计入总词数. 提示词展览exhibition DearJim Yours LiHua
下列化肥中属于复合肥料的是
8分Becauseofageingtheworldneedsaroboticsrevolution.Thequestionforallofusishowcanweusetechnologytomakethequalityoflifebetteraspeoplegetolder?SaysGillPrattamanwhohadpreviouslyrunacompetitiontofindartificiallyintelligentsemi﹣autonomousrobotsforthePentagon. Ageingandrobotsaremorecloselyrelatedthanyoumightthink. Ageingcreatesdemandforautomationintwoways.Firsttopreventoutputfromfallingasmorepeopleretireitisnecessarytousemachinesasareplacementforthosewhohavelefttheworkforceortoenableageingworkerstocontinuetodophysicallabor.Secondoncepeoplehaveretiredtheycreatemarketsfornewkindsofautomationincludingrobotsthathelpwiththemedicalandotherrequirementsofcaringforpeoplewhocannolongerlookafterthemselves. Automationisnottheonlywaytodealwithskillsshortagesbutitisoneofthemostimportant.Atthemomenttheroboticsmarketisledbyindustrialmachines.Asageingspeedsupservicerobotswhichenableoldpeopletolivealoneandhelpreducelonelinesswillbeingreatneed.Theywillmakeiteasiertolookafterpeopleinnursinghomesandenableolderworkerswhowanttostayemployedtokeepupwiththephysicaldemandsoflabor.Nowadaystherapeutic治疗的robotsdesignedforchildrenandpatientswithdementia痴呆andhuman﹣likerobotsthatcancarryoutconversationsonalimitedrangeoftopicshavealreadybeenputintouse. AccordingtotheInternationalFederationofRoboticsabout20000robotssoldin2018couldbedescribedashelpfultotheageing.Thatislessthan5%ofindustrialrobots.Thenumberwillundoubtedlygrow.Thequestionishowquickly.Mr.Prattisoptimistic.Overthepastfiveyearshearguestherehavebeenhugeadvancesinartificialintelligenceenablingmachinestosurpasshumansincertainkindsofinformationprocessing.Inotherwordsrobotsperformmorequicklyandreliablythanhumans.Newfirmsarepouringintothebusiness.Athirdofrobotcompaniesarelessthansixyearsoldandmakeservicerobots.Thecostsofresearchanddevelopmentarecomingdownandinvestmentisrising.WithinadecadeMr.Prattsupposesrobotsathomewillhelppeoplewithsimpletaskssuchascooking. Butforthattohappenrobotswillhavetoperformalonglistofthingstheycannotyetdo.Theycannotnavigatereliablyaroundanordinaryhomemovetheirhandsskillfullylikeahumanorconductopen﹣endedconversations.Althoughtheycanprovidesomephysicalassistancetotheelderlyonerobotcandoonlyonethingsomultipletaskswouldrequireyourhometobeequippedwithmanyrobots.Allthesesuggestthatintermsofsolvingtheproblemassociatedwithageingrobotshavealongwaytogo. 1Demandforautomationcausedbyageingexistsprobablybecauseautomation. A.keepsoutputsteadyasmorepeopleretire B.helpsageingpeoplecreatemorephysicallabor C.enablesageingpeopletolookafterthemselves D.createsamarketforageingpeople'smedicaltreatment 2AccordingtothesecondtolastparagraphMr.Prattmayagreethat. A.peopleareunwillingtoputmoremoneyinindustrialrobots B.peoplewillrelymoreonservicerobotsthanindustrialones C.robotsarebetterthanhumansatinformationprocessing D.servicerobotsaredevelopingfastinthenearfuture 3Fromthelastparagraphwecanlearnthattheauthorbelieves. A.robots'abilitytomovearoundanordinaryhomeisreliablenow B.onerobotcanalreadyperformalonglistoftasksatthesametime C.technicalproblemsinrobotsmaylimittheirwidersocialacceptance D.theneedforphysicallyhelpfulrobotsmaydecreaseifageingspeedsup 4Itcanbelearnedfromthepassagethat. A.thecostoffixingrobotsisstillhighnowadays B.robotscanhelpolderworkersstayemployedlonger C.servicerobotsaremorepracticalthanindustrialones D.human﹣likerobotscanconductopen﹣endedconversations
除去下列物质中的少量杂质所选试剂及操作都正确的是
1分thebadweatherstopsmeIgoforawalkeveryday. A.Despite B.Until C.As D.Unless
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