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如图（a）所示，整个空间存在竖直向上的匀强电场（平行于纸面），在同一水平线上的两位置，以相同速率同时喷出质量均为m的油滴a和b，带电量为+q的a水平向右，不带电的b竖直向上．b上升高度为h时，到达最...
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高三下学期物理《》真题及答案
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在图中实线框所示的区域内同时存在着匀强磁场和匀强电场.一个带电粒子不计重力恰好能沿直线MN从左至右通
匀强磁场方向竖直向上，匀强电场方向垂直于纸面向外
匀强磁场方向竖直向上，匀强电场方向垂直于纸面向里
匀强磁场方向垂直于纸面向里，匀强电场方向竖直向上
匀强磁场和匀强电场的方向都水平向右
如图所示某空间区域存在正交的匀强磁场和匀强电场电场方向水平向右磁场方向垂直纸面向里一带负电微粒由a点
微粒的动能一定增加
微粒的动能一定减少
微粒的电势能一定减少
微粒的机械能一定增加
如图所示斜面体固定在水平面上斜面粗糙.一带正电的绝缘物体自斜面上端由静止释放物体由顶端滑到底端所用的
在物体运动所在空间加竖直向下的匀强电场
在物体运动所在空间加水平向右的匀强电场
在物体运动所在空间加垂直纸面向里的匀强磁场
在物体运动所在空间加重直纸面向外的匀强磁场
如图所示绝缘斜面各处的粗糙程度相同带正电的滑块在绝缘斜面的AB段匀速下滑然后进入BC段要使滑块在BC
在BC段加竖直向上的匀强电场
在BC段加垂直斜面向下的匀强电场
在BC段加平行斜面向下的匀强磁场
在BC段加垂直纸面向外的匀强磁场
空间存在竖直向上的匀强电场质量为m的带正电的微粒水平射入电场中微粒的运动轨迹如图所示在相等的时间间隔
重力做的功相等
电场力做的功相等
电场力做的功大于重力做的功
电场力做的功小于重力做的功
如图所示空间存在着竖直向上的匀强电场和垂直纸面向外的匀强磁场一带电液滴从静止开始自a沿曲线acb运动
液滴带负电
滴在c点动能最大
若液滴所受空气阻力不计，则机械能守恒
液滴在c点机械能最大
如图AB所示两竖直平行金属板间存在匀强电场如图CD所示两竖直平行金属板间存在互相垂直的匀强电场和匀
B所示，两竖直平行金属板间存在匀强电场，如图C．D所示两竖直平行金属板间存在互相垂直的匀强电场和匀强磁场，四个相同的带正电的小球从图示位置由静止释放，进入平行板间的场区后可能按图示虚线轨迹做直线运动的是（ ）
A．
质量为m带+q电量的小球以水平初速度v0进入竖直向上的匀强电场中如图甲所示今测得小球进入电场后在竖直
如图所示某空间存在正交的匀强磁场和匀强电场电场方向水平向右磁场方向垂直纸面向里一带电微粒由a点进入电
微粒一定带负电
微粒动能一定减小
微粒的电势能一定增加
微粒的机械能不变
如图所示某空间存在正交的匀强磁场和匀强电场电场方向水平向右磁场方向垂直纸面向里一带电微粒由a点进入电
微粒一定带负电
微粒动能一定减小
微粒的电势能一定增加
微粒的机械能一定增加
如图所示某空间存在正交的匀强磁场和匀强电场电场方向水平向右磁场方向垂直纸面向里一带电微粒由a点进入电
微粒一定带负电
微粒动能一定减小
微粒的电势能一定增加
微粒的机械能不变
若粒子刚好能在如图所示的竖直向上的匀强电场和垂直纸面向里的匀强磁场的竖直面内做匀速圆周运动则可以判断
粒子带负电
粒子带正电
只能是逆时针运动
只能是顺时针运动
如图所示在空间中存在垂直纸面向里的匀强磁场其竖直边界ABCD的宽度为d在边界AB左侧是竖直向下场强为
如图所示MN是纸面内的一条直线其所在空间充满与纸面平行的匀强电场或与纸面垂直的匀强磁场场区都足够大现
如果粒子回到MN上时速度增大，则该空间存在的场一定是电场。
如果粒子回到MN上时速度大小不变，则该空间存在的场可能是电场。
若只改变粒子的初速度大小，发现粒子再回到MN上时与其所成的锐角夹角不变，则该空间存在的场一定是磁场。
若只改变粒子的初速度大小，发现粒子再回到MN上所用的时间不变，则该空间存在的场一定是磁场。
如图所示倾角为θ的绝缘斜面固定在水平面上当质量为m带电荷量为+q的滑块沿斜面匀速下滑时在此空间突然加
加上竖直向上的电场后,滑块将减速下滑
加上竖直向下的电场后,滑块仍匀速下滑
加上竖直向上的电场后,滑块仍匀速下滑
加上竖直向下的电场后,滑块将加速下滑
质量为m带+q电量的小球以水平速度V0进入竖直向上的匀强电场中如图甲所示今测得小球进入电场后竖直方向
如图所示空间存在正交的匀强电场和匀强磁场匀强电场方向竖直向上匀强磁场的方向垂直纸面向里.有一内壁光滑
洛伦兹力不做功[z.zs.tep.]
电场力做正功
小球运动轨迹为拋物线
水平拉力F.大小不变
在空间中存在垂直纸面向里的匀强磁场其竖直边界ABCD的宽度为d在边界AB左侧是竖直向下场强为E.的匀
如图所示倾角为θ的绝缘斜面固定在水平面上当质量为m电量为q带正电的滑块沿斜面下滑时在此空间突然加上竖
若滑块匀速下滑，加上竖直向上的电场后，滑块将减速下滑；
若滑块匀速下滑，加上竖直向下的电场后，滑块将加速下滑
若滑块匀减速下滑，加上竖直向上的电场后，滑块仍减速下滑，但加速度变小
若滑块匀加速下滑，加上竖直向下的电场后，滑块仍加速下滑，但加速度变大。
如图所示空间存在着竖直向上的匀强电场和垂直纸面向外的匀强磁场一带电液滴从静止开始自a沿曲线acb运动
液滴带负电
滴在c点动能最大
若液滴所受空气阻力不计，则机械能守恒
液滴在c点机械能最大
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DirectionsCompletethefollowingpassagebyusingthewordsinthebox.Eachwordcanonlybeusedonce.Notethatthereisonewordmorethanyouneed. Consideringhowmuchtimepeoplespendinofficesitisimportantthatworkbewelldesigned.Well﹣designedofficespaceshelpcreateacooperation'simage.Theymotivateworkersandtheymakeanimpressiononpeoplewhovisitandmightbepotentialor41customer.Theymakebusinessesworkbetterandtheyareapartofthecorporateculturewelivein. Aswemoveawayfromanindustrial﹣basedeconomytoaknowledge﹣basedoneofficedesignershavecomeupwith42tothetraditionalworkenvironmentsofthepast.Thedesignindustryhasmovedawayfromafixedofficesetupandcreatedmoreflexiblestrategicmanagementenvironments.These43solutionsaretomeanttosupportbetterorganizationalperformances. Asemployeehierarchies等级制度haveflattenedordecreasedofficedesigners‘responsetothischangehasbeentomoveopen﹣plainareastomoredesirablelocationswithintheofficeandcreatefewerformalprivateoffices.Theneedforincreasedflexibilityhasalsobeen44bychangesinworkstationdesign.Officesandworkspacesoftenarenot45toagivenpersononapermanentbasisbecauseofchangestomethodofworkingnewdesignsallowforexpansionormovementofdesksstorageandequipmentwithintheworkstation.Anotherimportantdesigngoaliscommunicationwhichdesignershaveimprovedbyloweringthewallsthat46workstations.Designershavealsocreatedinformalgatheringplacesandupgradedemployees'47toheavilytraffickedareassuchascopyandcoffeerooms. Corporateandinstitutionalofficedesignersoftenstruggletoresolveanumberofcompetingandoften48demandsincludingbudgetarylimitsemployeehierarchiesandtechnologicalinnovationespeciallyinrelationtocomputerization.Thesedemandsmustalsobebalancedwiththeneedtocreateinteriors内饰thatinsomewayenhanceestablishorpromoteacompany‘simageandwillenableemployeesto49attheirbest.Allthese50ofofficedesignarerelated.Themostsuccessfulofficedesignsarelikeagoodmarriage﹣﹣thewell﹣designedofficeandtheemployeesthatoccupyitareseeminglymadeforeachother. 41. 42. 43. 44. 45. 46. 47. 48. 49. 50.
OneoftheexecutivesgatheredattheAspenInstituteforaday﹣longleadershipworkshopusingtheworksofShakespearewasdiscussingtheroleofBrutusinthedeathofJuliusCaesar.Brutuswasnotanhonorablemanhesaid.Hewasatraitor叛徒.Andhemurderedsomeoneincoldblood.TheagreementwasthatBrutushadactedwithcrueltywhenotheroptionswereavailabletohim.Hemadeabaddecisiontheysaid﹣atleastasitwaspresentedbyShakespeare﹣totaketheleadinmurderingJuliusCaesar.AndthoughoneoftheexecutivesacknowledgedthatBrutushadthegoodoftherepublicinmindCaesarwasneverthelesshissuperior.Youhavetoendeavortheexecutivessaidourpolicyistoobeythechainofcommand. DuringthelastfewyearsbusinessexecutivesandbookwriterslookingforanewwaytoadvisecorporateAmericahavebeenexploitingShakespeare'swisdomforprofitableends.NonemoresothanhusbandandwifeteamKennethandCarolAdelmanwell﹣knownadviserstotheWhiteHousewhostartedupatrainingcompanycalledMoversandShakespeares.TheyareamateurShakespearescholarsandShakespeareloversandtheyhavecombinedtheirpassionandtheirhighlevelcontactsintoamanagementtrainingbusiness.Theyconductbetween30and40workshopsannuallyfocusingonhalfadozendifferentplaysmostlyforcorporationsbutalsoforgovernmentagencies. Theworkshopsalltakethesameformfocusingonasingleplayasakindofcasestudyandusingindividualscenesasspecificlessons.InJuliusCaesarslyprovocation狡诈的挑唆ofBrutustotakeuparmsagainstthewhatwasabasisforadiscussionofmethodsofteambuildingandgrassrootsorganism. AlthoughneitheroftheAdelmansisacademicallytrainedinliteraturetheprogrammescontainplentyofShakespearetraditionandbackground.TheirworkshoponHenryVforexampleincludesahelpfulexplanationofHenry'swinningstrategyattheBattleofAgincourt.Buttheydocometothetextwithafewbiases偏向theirreadingofHenryVminimizeshismisuseofpower.Insteadtheyemphasizethestoryoftheyouthwhoseizesopportunityandbecomesamasterfulleader.AndattheworkshoponCaesarMr.AdelmanshadlittlegoodtosayaboutBrutussayingthenoblestRomanofthemallcouldn'tmakehismindupaboutthings. ManyoftheparticipantspointedtoveryspecificelementsintheplaythattheyfeltrelatedCaesar'spridewhichledtohismurderandBrutus'smistakesinleadingtheafterthemurdertheysaidraisevitalquestionsforanyoneservingasabusinesswhenandhowdoyouresisttheboss? 73.Accordingtoparagraph1whatdidalltheexecutivesthinkofBrutus?. A.Cruel. B.Superior. C.Honourable. D.Rude 74.AccordingtothepassagetheAdelmanssetupMoversandShakespearesto. A.helpexecutivestounderstandShakespeare'splaysbetter B.giveadviceonleadershipbyanalyzingShakespeare'splays C.providecasestudiesofShakespeare'splaysinliteratureworkshops D.guidegovernmentagenciestofollowthecharactersinShakespeare'splays. 75.WhydotheAdelmansconductaworkshoponHenryV? A.Tohighlighttheimportanceofcatchingopportunities. B.Toencouragemasterfulleaderstoplanstrategiestowin. C.Toillustratetheharmofprejudicesinmanagement. D.Towarnexecutivesagainstpowermisuse. 76.Itcanbeinferredfromthepassagethat. A.theAdelmans'programmeprovesbiasedastherolesofcharactersaremaximized. B.executivesfeelboredwithtoomanyspecificelementsofShakespeare'splays. C.theAdelmanswillmakemoreprofitsiftheyareprofessionalscholars. D.Shakespearehasplayedanimportantroleinthemanagementfield. 77.Thebesttitleforthepassageis. A.Shakespeare'splaysExecutivesreconsidercorporateculture B.Shakespeare'splaysAnessentialkeytobusinesssuccess C.Shakespeare'splaysalessonforbusinessmotivation D.Shakespeare'splaysDramatictrainingbringsdramaticresults.
FreedomandResponsibility Freedom'schallengeintheDigitalAgeisaserioustopic.Wearefacingtodayastrangenewworldandweareallwonderingwhatwearegoingtodowithit. Some2500yearsagoGreecediscoveredfreedom.Beforethattherewasnofreedom.Thereweregreatcivilizationssplendidempiresbutnofreedomanywhere.EgyptandBabylonwerebothtyranniesoneverypowerfulmanrulingoverhelplessmasses. InGreeceinAthens雅典alittlecityinalittlecountrytherewerenohelplessmasses.AndAthenianswillinglyobeyedthewrittenlawswhichtheythemselvespassedandtheunwrittenwhichmustbeobeyediffreemenlivetogether.Theymustshoweachotherkindnessandpityandthemanyqualitieswithoutwhichlifewouldbeverypainfulunlessonechosetolivealoneinthedesert.TheAtheniansneverthoughtthatamanwasfreeifhecoulddowhathewanted.Amanwasfreeifhewasself﹣controlled.Tomakeyourselfobeywhatyouapprovedwasfreedom.Theyweresavedfromlookingattheirlivesastheirownprivateaffair.EachonefeltresponsibleforthewelfareofAthensnotbecauseitwasforcedonhimfromtheoutsidebutbecausethecitywashisprideandhissafety.Theessentialbeliefofthefirstfreegovernmentintheworldwaslibertyforallmenwhocouldcontrolthemselvesandwouldtakeresponsibilityforthestate. Butdiscoveringfreedomisnotlikediscoveringcomputers.Itcannotbediscoveredonceforall.Ifpeopledonotprizeitandworkforititwillgo.Constantwatchisitsprice.Athenschanged.Itwasachangethattookplacewithoutbeingnoticedthoughitwasoftheextremeimportanceaspiritualchangewhichaffectedthewholestate.IthadbeentheAtheniansprideandjoytogivetotheircity.Thattheycouldgetmaterialbenefitsfromherneverenteredtheirminds.Therehadtobeacompletechangeofattitudebeforetheycouldlookatthecityasanemployerwhopaidhercitizensfordoingherwork.Nowinsteadofmengivingtothestatethestatewastogivetothem.Whatthepeoplewantedwasagovernmentwhichwouldprovideacomfortablelifeforthemandwiththisastheprimaryobjectideasoffreedomandself﹣relianceandresponsibilitywereneglectedtothepointofdisappearing.Athenswasmoreandmorelookedonasacooperativebusinesspossessedofgreatwealthinwhichallcitizenshadarighttoshare. Athensreachedthepointwhenthefreedomshereallywantedwasfreedomfromresponsibility.Therecouldbeonlyoneresult.Ifmeninsistedonbeingfreefromtheburdenofself﹣dependenceandresponsibilityforthecommongoodtheywouldceasetobefree.Responsibilityisthepriceeverymanmustpayforfreedom.Itistobehadonnootherterms.AthenstheAthensofAncientGreecerefusedresponsibilityshereachedtheendoffreedomandwasnevertohaveitagain. ButtheexcellentbecomesthepermanentAristotlesaid.Athenslostfreedomforeverbutfreedomwasnotlostforeverfortheworld.AgreatAmericanJamesMadisonreferredtoThecapacity能力ofmankindforself﹣government.NodoubthehadnotanideathathewasspeakingGreek.Athenswasnotinthefarthestbackgroundofhismindbutoncemanhasagreatandgoodideaitisnevercompletelylost.TheDigitalAgecannotdestroyit.Somehowinthisorthatman'sthoughtsuchanidealivesthoughunconsideredbytheworldofaction.Onecanneverbesurethatitisnotonthepointofbreakingoutintoactiononlysurethatitwilldososometime. 65.WhatdoestheunderlinedwordtyranniesinParagraph2referto? A.Countrieswheretheirpeopleneedhelp. B.Powerfulstateswithhighercivilization. C.Splendidempireswherepeopleenjoyfreedom. D.Governmentsruledwithabsolutepower. 66.Peoplebelievinginfreedomarethosewho. A.regardtheirlifeastheirownbusiness B.seekgainsastheirprimaryobject C.behavewithinthelawsandvaluesystems D.treatotherswithkindnessandpity 67.WhatchangeinattitudetookplaceinAthens? A.TheAtheniansrefusedtotaketheirresponsibility. B.TheAtheniansnolongertookprideinthecity. C.TheAtheniansbenefitedspirituallyfromthegovernment. D.TheAthenianslookedonthegovernmentasabusiness. 68.WhatdoesthesentenceTherecouldbeonlyoneresult.inParagraph5mean? A.Athenswouldcontinuetobefree. B.Athenswouldceasetohavefreedom. C.Freedomwouldcomefromresponsibility. D.FreedomwouldstopAthensfromself﹣dependence. 69.WhydoestheauthorrefertoAristotleandMadison? A.Theauthorishopefulaboutfreedom. B.Theauthoriscautiousaboutself﹣government. C.TheauthorisskepticalofGreekcivilization. D.Theauthorisproudofman'scapacity. 70.Whatistheauthor'sunderstandingoffreedom? A.Freedomcanbemorepopularinthedigitalage. B.Freedommaycometoanendinthedigitalage. C.Freedomshouldhavepriorityoverresponsibility. D.Freedomneedstobeguaranteedbyresponsibility.
数列{an}满足an+1＝2|sin|﹣1an+2n则数列{an}的前100项和为
Itmighthavesavedmesometroubletheschedule. A.didIknow B.haveIknown C.doIknow D.hadIknown
在你生命中如果有一个人你需要对他说对不起那么就去向他道歉吧.apologyIfthereissomeoneinyourlifetowhomyouneedtosaysorrygoaheadandmakean apology..
以平面直角坐标系xOy的原点为极点x轴的正半轴为极轴建立极坐标系两种坐标系中取相同的长度单位直线l的参数方程为圆C的极坐标方程为ρ＝4sinθ+． 1求直线l的普通方程与圆C的直角坐标系 2设曲线C与直线l交于AB两点若P点的直角坐标为21求||PA|﹣|PB||的值．
请阅读下面文字及图表并按照要求用英语写一篇150词左右的文章. [写作内容] 1.用约30个单词概述上述信息的主要内容 2.结合上述信息简要分析导致交通问题的主要原因 3.根据你的分析从社会规范rulesandregulations和个人行为两方面谈谈你得到的启示不 少于两点. [写作要求] 1.写作过程中不能直接引用原文语句 2.作文中不能出现真实姓名和学校名称 3.不必写标题. [评分标准] 内容完整语言规范语篇连贯词数适当.
Itissocoldthatyoucan'tgooutsidefullycoveredinthickclothes. A.if B.unless C.once D.when
IwasrequiredtoreadoneofBernieSiegel'sbooksincollegeandwashookedonhispositivityfromthatmomenton.Thestoriesofhisunconventional36andtheexceptionalpatientshewroteaboutwereso37tomeandhadsuchabig38onhowIsawlifefromthenon.WhoknewthatsomanyyearslaterIwouldlooktoDr.BernieandhisCDsagainto39myowncancerexperience? I'manambitious40andwhenIstartedgoingthroughchemo化疗eventhoughI'mavery41personIlostmydrivetowrite.Iwasjusttootiredandnotinthe42.Onedaywhilewaitingtogoinfor43IhadoneofDr.Bernie'sbooksinmyhand.Anotherpatient44whatIwasreadingandstruckupaconversationwithme45hehadoneofhisbookswithhimaswell.It46thatamongotherthingshewasaneighty﹣year﹣oldwriter.Hewas47apublishedauthorandhewascurrently48onanewbook. Wewouldseeeachotheratvarioustimesand49friends.SometimesheworeaduckhatandIwouldtellmyselfhewasdefinitelyan50ofDr.Bernie.Hereallyputa51onmyface.Heunfortunately52lastyearduetohiscancer53heleftadeepimpressiononmeandgavemethe54topickupmypenagain.I55tomyselfIfhecandoitthensocanI. 36.A.tastes B.ideas C.notes D.memories 37.A.amazing B.shocking C.amusing D.strange 38.A.strike B.push C.challenge D.impact 39.A.learnfrom B.goover C.getthrough D.referto 40.A.reader B.writer C.editor D.doctor 41.A.positive B.agreeable C.humorous D.honest 42.A.mood B.position C.state D.way 43.A.advice B.reference C.protection D.treatment 44.A.viewed B.knew C.noticed D.wondered 45.A.while B.because C.although D.providing 46.A.cameout B.workedout C.provedout D.turnedout 47.A.naturally B.merely C.hopefully D.actually 48.A.deciding B.investing C.working D.relying 49.A.became B.helped C.missed D.visited 50.A.patient B.operator C.fan D.publisher 51.A.sign B.smile C.mark D.mask 52.A.showedup B.setoff C.felldown D.passedaway 53.A.since B.but C.so D.for 54.A.guidance B.trust C.opportunity D.inspiration 55.A.promised B.swore C.thought D.replied
若实数xy满足不等式组目标函数t＝x﹣2y的最大值为2则实数a的值是
已知点Mab在圆Ox2+y2＝1外则直线ax+by＝1与圆O的位置关系是
将函数fx＝sin2x的图象向右平移φ0＜φ＜个单位后得到函数gx的图象．若对满足|fx1﹣gx2|＝2的x1x2有|x1﹣x2|min＝则φ＝
如图半径为a的内圆A是电子发射器其金属圆周表圆各处可沿纸面内的任意方向发射速率为v的电子外圆C为与A同心的金属网半径为a．不考虑静电感应及电子的重力和电子间的相互作用已知电子质量为m电量为e． 1为使电子从C射出的速率达到3vCA间应加多大的电压U 2CA间不加电压而加垂直于纸面向里的匀强磁场． ①若沿A径向射出的电子恰好不从C射出求该电子第一次回到A时在磁场中运动的时间t ②为使所有电子都不从C射出所加磁场磁感应强度B应多大．
Giftfromastranger Mylocalsupermarketisalwaysbusy.ThefirstparkingspaceIfoundwasconvenientbutI'dnoticedawomaninabluecarcirclingforawhile.25IwasinagoodmoodIletherhaveit.OntheedgeofthecarparkIbackedintothenextavailablespot﹣itwasatightfit. PrettysoonI'dmademywaythroughthesupermarketandwasbackinthefreshair.FeelinggoodI26emptymypursechangeintothehandsofahomelessmanandhelpedastrugglingwomanreversepark. JustasIapproachedmycar1sawthewomanI'dlethavemycarspaceearlier.Shewasgivingme27oddlook﹣halfpuzzledhalfintent热切的.Ismiledandwishedherapleasantday.AsIsqueezedbackintomycarIspottedthesamelady28lookinatme.Helloshesaidhesitantly.This29soundcrazybutIwasonmywaytodropsomeofmymother'sthingsoffatthecharitybins.Youarejustsomuch30her.YouhelpedthosepeopleInoticedandyouseemedsohappy.Shelookedatmemeaningfullyandpassedaboxinthroughthewindow.Ithinkshewouldlikeyoutohaveit.31shockItookitfromherautomatically.Shesmiledandwalkedaway. AfterapauseIopenedthebox.Insidewasabeautifulgoldnecklacewithalargegreypearl.Itwas32nicegiftI'deverreceivedanditwasfromacompletestranger.Thenecklacewasaroundmyneckawarmreminderofhumankindness. 25. 26. 27. 28. 29. 30. 31. 32.
Therealreasonwhypricesandstillaretoohighiscomplexandnoshortdiscussioncansatisfactorilyexplainthisproblem. A.Were B.willbe C.havebeen D.hadbeen
申请材料需要精心准备这样你心仪的学校才会对你的能力有全面准确的了解.inorderthat.
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