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如图甲所示，气缸（足够长）开口向右、固定在水平桌面上，气缸内用横截面积为S的活塞封闭了一定质量的理想气体，活塞与气缸壁之间的摩擦忽略不计．轻绳跨过光滑定滑轮将活塞和地面上质量为m的重物连接．开始时气...
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高三下学期物理《》真题及答案
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如图甲所示光滑的水平桌面上固定着一根绝缘的长直导线可以自由移动的矩形导线框abcd靠近长直导线静止放
在t
2
时刻，线框内没有电流，线框不受力
t
1
到t
2
时间内，线框内电流的方向为abcda
t
1
到t
2
时间内，线框向右做匀减速直线运动
t
1
到t
2
时间内，线框克服磁场力做功
如图所示一长为L.内横截面积为S.的绝热气缸固定在水平地面上气缸内用一质量为m的绝热活塞封闭了一定质
2012•淮安如图甲所示一块长木板放在水平桌面上现用一水平力F向右缓慢地推木板使其一部分露出桌面如图
F、p不变，f变大
F、f不变，p变大
F变小，p、f变大
F、f不变，p变小
如图所示一长为L.内横截面积为S.的绝热气缸固定在水平地面上气缸内用一质量为m的绝热活塞封闭了一定质
如图所示在水平光滑桌面上放一质量为2m的玩具小车在小车的左侧固定一光滑圆弧轨道是小车的一部分其末端处
气缸长为L=1m气缸的厚度可忽略不计开口向上固定在水平面上气缸中有横截面积为S=100cm2的光滑活
如图甲所示圆柱形气缸开口向上竖直放置在水平面上气缸足够长内截面积为S.大气压强为一厚度不计质量的活塞
一个质量为M.的长木板静止在光滑的水平桌面上一块质量为m的小滑块以水平速度v0从长木板的一端开始在木
如下图所示水平光滑的桌面上放一质量为M的玩具小车在小车的平台上有一质量可忽略的弹簧弹簧的一端固定在平
一质量为M.的长木板静止在光滑水平桌面上.一质量为m的小滑块以水平速度v0从长木板的一端开始在木板上
如图所示将两根完全相同的磁铁分别固定在质量相等的长木板甲和乙上然后放于光滑的水平桌面上开始时使甲获得
如图甲所示将一块质地均匀的长木板平放在水平桌面上用水平力F.向右缓慢推动木板使其右端渐渐露出桌面如图
绝热气缸的质量为M绝热活塞的质量为m活塞与气缸壁之间无摩擦且不漏气气缸中密封一部分理想气体最初气缸被
气体的压强不变
气体的内能减少
气体的温度升高
气体的体积增大
如图所示在水平光滑桌面上放一质量为2m的玩具小车在小车的左侧固定一光滑圆弧轨道是小车的一部分其末端处
如图所示一长为L.内横截面积为S.的绝热气缸固定在水平地面上气缸内用一质量为m的绝热活塞封闭了一定质
如图1所示一块长木板放在水平桌面上如图甲所示现用一水平方向力F.’向右缓缓地推木块使其一部分露出在桌
F.不变，p减小
F.减小，p不变
F.不变，p增大
F.增大，p不变
如图1所示汽缸开口向右固定在水平桌面上气缺内用活塞横截面积为S封闭了一定质量的理想气体活塞与气缸壁之
绝热气缸的质量为M.绝热活塞的质量为m活塞与气缸壁之间无摩擦且不漏气气缸中密封一部分理想气体最初气缸
气体的压强不变
气体的内能减少
气体的温度升高
气体的体积减小
如图甲所示光滑的水平桌面上固定着一根绝缘的长直导线可以自由移动的矩形导线框abcd靠近长直导线静止放
在t
2
时刻，线框内没有电流，线框不受力
t
1
到t
2
时间内，线框向右做减速直线运动
t
1
到t
2
时间内，线框内电流的方向为abcda
t
1
到t
2
时间内，线框克服磁场力做功
在探究平面镜成像特点的实验中装置如图甲所示.1选取A.B.两支完全相同的蜡烛是为了比较像与物的关系.
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10分 IsFreshAirReallyGoodforYou? Weallgrewuphearingpeopletellustogooutandgetsomefreshair.1AccordingtorecentstudiestheanswerisabigYESiftheairqualityinyourcampingareaisgood. 2Iftheairyou'rebreathingisclean﹣whichitwouldbeifyou'reawayfromthesmogofcities﹣thentheairisfilledwithlife﹣givingenergizingoxygen.Ifyouexerciseoutofdoorsyourbodywilllearntobreathemoredeeplyallowingevenmoreoxygentogettoyourmuscles肌肉andyourbrain. Recentlypeoplehavebegunstudyingtheconnectionbetweenthenaturalworldandhealing治愈.3Intheseplacespatientscangotobenearnatureduringtheirrecovery.Itturnsoutthatjustlookingatgreengrowingthingscanreducestresslowerbloodpressureandputpeopleintoabettermood情绪.Greeneryisgoodforus.HospitalpatientsWhoseetreebranchesouttheirwindowarelikelytorecoveratafasterratethanpatientswhoseebuildingsorskyinstead.4Itgivesusagreatfeelingofpeace. 5Whilethesun'srayscanageandharmourskintheyalsogiveisbeneficialVitaminD.TomakesureyougetenoughVitaminD﹣butstillprotectyourskin﹣putonsunscreenrightasyouheadoutside.Ittakessunscreenaboutfifteenminutestostartworkingandthat'splentyoftimeforyourskintoabsorbaday'sworthofVitaminD. A.Freshaircleansourlungs. B.Sowhatareyouwaitingfor? C.Beinginnaturerefreshesus. D.Anothersidebenefitofgettingfreshairissunlight. E.Butisfreshairreallyasgoodforyouasyourmotheralwayssaid? F.Justasimportantlywetendtoassociateairwithhealthcare. G.AllacrossthecountryrecoverycentershavebegunbuildingHealingGardens.
如图所示一端开口另一端封闭的玻璃管内用水银柱封住一定质量的空气当开口向下竖直放置时下水银面恰与管口相平．现使玻璃管绕管口转过30°角则被封闭的气体
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30分 AGoodMan It'salateSaturdayafternooninearlyMarchandIamsweatinginsearchoftheonlygiftmysonwantsfromLosAngelesa1tothehomesofthestarssuchasBradPittandJetLi. AcheerfultaxidriversaysNoproblem.Mapsellersareeverywhere!Whenthetaxistopsafellow2withathinfoldedsheetandsaysTendollars. Tendollars!Withabsolute3IinformhimThat'stoomuch.Themapmanleaves.IbeginwalkingcertainI'llfindaan4starmapsoon. Iam5.There'shardlyanybodyonthestreet.Theredon'tseemtobemanyrealstoresjustcarsandbars.Nomaps.Nostars.Blockspass.Thesunbeginstosink.Atthe edgeofWestHollywood6fellowwandersaheadsellingstarmapstosometeenagegirls. Tendollars7.Forgetit.Mysonwill8. ThatnightIcallmywife.Didyougetoneofthosemapstothestars?He'sbeentalkingabout9else. This10ishardtoignore.It'slate.Atall﹣nightmarketsnomaps.Iheadbacktothehotel.Morningiscoming.Therewillbeonelast11.AfterIcheckoutItakeataxi.Butatnineinthemorningmapsellersare12tobefound. YouknowsaysthedriverTheguyswiththemapsjustaren'tupyet!He'sright. Forgetit.Let'sgototheairport. WellsaysthedriverIcould13youoneifyoulike. Sure.Trustthisguy?Imightaswellthrowcashontothefreeway.ButexitingthetaxiI14mylastchance.Ihandhim＄13andmybusinesscard.Threeweekspass.I've15onthestarmap.Mysonhasstoppedmentioningit. Thenoneafternoonstickingoutfromunderpilesofflyersthereitisabigwhiteenvelope.Thereisasmallnote.Icanhardlyreadit16Imakeoutafewphrases﹣forgive17taxi'sbeendownandfinallyhere'smapforyourson.There'snoreturnaddress.It'ssignedkindregardsM. Iholdthenoteinmyhand18whatmysonsaidtomewhenIgotbackfromLosAngeles. Didyoumeetany19Dad?heasked. NowIknowwhattotellhim. YesIdid.ImetaguynamedM. Ifyounever20anybodyyou'llneverfindthegoodguys. 1A.decoration B.map C.book D.symbol 2A.argues B.requests C.competes D.approaches 3A.assurance B.permission C.anxiety D.bargain 4A.perfect B.inexpensive C.proper D.detailed 5A.shocked B.confused C.impatient D.wrong 6A.any B.some C.another D.either 7A.still B.even C.almost D.yet 8A.believe B.regret C.understand D.admit 9A.anything B.everything C.something D.nothing 10A.idea B.news C.change D.reason 11A.try B.journey C.action D.minute 12A.everywhere B.somewhere C.anywhere D.nowhere 13A.give B.mail C.show D.spare 14A.create B.recognize C.deserve D.blow 15A.givenup B.throwndoubts C.refusedoffers D.droppedin 16A.and B.or C.but D.for 17A.fault B.delay C.carelessness D.rudeness 18A.remembering B.reminding C.reviewing D.realizing 19A.admirers B.friends C.stars D.heroes 20A.lookupto B.turnto C.havefaithin D.agreewith
如图如图1中两个被固定的点电荷Q1Q2连线的延长线上有ab两点．Q1带正电检验电荷+q仅受电场力作用t＝0时恰经过b点然后沿ba向右运动其v﹣t图象如图2．则Q2带电从b到a的过程中q的电势能变化情况是．
25分假定你是李华暑假在伦敦学习得知当地美术馆要举办中国画展.请写一封信申请做志愿者内容包括 1.写信目的 2.个人优势 3.能做的事情. 注意 1.词数100左右 2.可以适当增加细节以使行文连贯 3.结束语已为你写好.
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布朗运动实验得到某个观察记录如图该图反映了
有四个电源电动势均为6V内阻分别为0.5Ω1Ω2Ω3Ω．选择其中一个电源对阻值为2Ω的电阻R供电为使R上获得的功率最大选择的电源其内阻为
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实验小组在做“验证机械能守恒定律”实验时提出了两种方案甲方案为让小车沿倾斜的木板下滑然后测量相关物理量乙方案为将小球用细长绳悬挂固定后使小球摆动然后测量相关物理量 1你建议选择的方案是填“甲”或“乙”理由是． 2若实验小组选用了乙方案实验装置如图所示．实验中用于测量小球速度的传感器可选用传感器． 3实验前已测得DCBA各点高度分别为0m0.050m0.100m0.150m．某同学获得的实验数据如下表分析表中数据发现从B到C到D机械能逐渐减小其原因是． 次数 D C B A 高度h/m 0 0.060 0.100 0.150 速度v/m/s 1.878 1.616 1.299 0 势能Ep/J 0 0.0039 0.0078 0.0118 动能Ek/J 0.0141 0.0104 0.0067 0 机械能E/J 0.0141 0.0144 0.0146 0.0118 4表中A点的机械能数据明显偏小其原因可能是摆锤的释放点A点选填“高于”“低于”
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处语言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∧并在其下面写出该加的词. 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. DearSir/Madam I'mwritinginresponsetoyouradvertisementintheBingleyTimesinMarch2nd.I'mveryinterestinginjoiningyourDanceclassesandwouldbegratefulunlessyoucouldanswerafewquestionsIhave. Youradvertisementstatesthatanumberintheclasseswaskepttoaminimum.Howmuchpeoplearethereineachclass?AsIworkeverydayuntil5o'clockIwouldalsoliketoknowthetimesoftheclasses.InadditionI'dliketoknowifIneedanyspecialshoesfortheclassesandI'dgreatlyappreciateifyoucouldtellmewheretobuyanynecessaryequipments.Finallyasit'smyintentiontoattendtotheseclassesregularlycouldyoualsosendmedetailsofpricesormembershipfees? Thankyouforyourkindattention.Pleasereplyatyourearliestconvenience. Yoursfaithfully ElaineRichards
物体从高处自由下落落地时间为t．若选地面为参考平面当下落时间为时物体所具有的动能和重力势能之比为
如图“离心转盘游戏”中设游客与转盘间的滑动摩擦系数均相同最大静摩擦力等于滑动摩擦力．当转盘旋转的时候更容易发生侧滑向外偏离圆周轨道的是
卢瑟福进行的α粒子散射实验现象表明
如图倾斜固定放置的“Π”形光滑金属导轨位于与水平面成θ角的平面内导轨宽为L电阻不计．宽度均为d的矩形有界匀强磁场ⅠⅡ方向垂直导轨平面向下磁感应强度大小均为B两磁场间的距离也为d．质量为m电阻为R的金属杆ab平行于导轨顶部从距离磁场Ⅰ上边缘h处由静止释放．已知金属杆进入磁场Ⅰ和Ⅱ时的速度相等且始终与导轨接触良好重力加速度为g． 1求金属杆刚进入磁场Ⅰ时的速度v大小 2定性分析金属杆穿过两磁场的过程中能量是如何变化的 3分析并说明金属杆释放处与磁场Ⅰ上边缘的距离h需满足的条件 4作出金属杆从进入磁场Ⅰ到离开磁场Ⅱ这一过程中的v﹣t图象．
8分Asdataandidentitytheftbecomesmoreandmorecommonthemarketisgrowingforbiometric生物测量technologies﹣likefingerprintscans﹣tokeepothersoutofprivatee﹣spaces.Atpresentthesetechnologiesarestillexpensivethough. ResearchersfromGeorgiaTechsaythattheyhavecomeupwithalow﹣costdevice装置thatgetsaroundthisproblemasmartkeyboard.Thissmartkeyboardpreciselymeasuresthecadence节奏withwhichonetypesandthepressurefingersapplytoeachkey.Thekeyboardcouldofferastronglayerofsecuritybyanalyzingthingsliketheforceofauser'stypingandthetimebetweenkeypresses.Thesepatternsareuniquetoeachperson.Thusthekeyboardcandeterminepeople'sidentitiesandbyextensionwhethertheyshouldbegivenaccesstothecomputerit'sconnectedto﹣regardlessofwhethersomeonegetsthepasswordright. Italsodoesn'trequireanewtypeoftechnologythatpeoplearen'talreadyfamiliarwith.Everybodyusesakeyboardandeverybodytypesdifferently. Inastudydescribingthetechnologytheresearchershad100volunteerstypethewordtouchfourtimesusingthesmartkeyboard.Datacollectedfromthedevicecouldbeusedtorecognizedifferentparticipantsbasedonhowtheytypedwithverylowerrorrates.Theresearcherssaythatthekeyboardshouldbeprettystraightforwardtocommercializeandismostlymadeofinexpensiveplastic﹣likeparts.Theteamhopestomakeittomarketinthenearfuture. 1Whydotheresearchersdevelopthesmartkeyboard? A.Toreducepressureonkeys. B.Toimproveaccuracyintyping. C.Toreplacethepasswordsystem. D.Tocutthecostofe﹣spaceprotection. 2Whatmakestheinventionofthesmartkeyboardpossible? A.Computersaremucheasiertooperate. B.Fingerprintscanningtechniquesdevelopfast. C.Typingpatternsvaryfrompersontoperson. D.Datasecuritymeasuresareguaranteed. 3Whatdotheresearchersexpectofthesmartkeyboard? A.It'llbeenvironment﹣friendly. B.It'llreachconsumerssoon. C.It'llbemadeofplastics. D.It'llhelpspeeduptyping. 4Whereisthistextmostlikelyfrom? A.Adiary. B.Aguidebook. C.Anovel. D.Amagazine.
闭合电路中电源的电动势为12V外电压为10V当有2C电量通过电路时该电路中的能量转化情况是非静电力把J的其他形式能量转化为电能静电力把J的电能转化为其他形式能量电源消耗了J的电能．
链式反应中重核裂变时放出的可以使裂变不断进行下去的粒子是
汽车在平直公路上直线行驶发动机功率保持恒定行驶时所受的阻力恒定其加速度a和速度的倒数图象如图．若已知汽车的质量根据图象信息不能求出
做竖直上抛运动的物体在任意相等时间内速度的变化量
一人站在体重计上．当他静止时台秤指针指在45kg刻度处．则在他快速蹲下的整个过程中台秤指针
Anewstudyhasshownhowcomputersandrobotspoweredbyartificialintelligencecanreadhumaneyemovementstoreadhumanpersonalities. Theeyestheysayarethewindowstothesoul.Andifthatistruecomputersandrobotspoweredbysophisticatedartificialintelligencealgorithms算法maysoonhavetheabilitytopeerintoyoursoul.ThatistheresultofanewstudyontheconnectionbetweeneyemovementsandpersonalityconductedbyneuroscienceresearchersbasedattheUniversityofSouthAustraliaandPublishedinthescientificJournalFrontiersinNeuroscience. EyemovementsduringaneverydaytaskpredictaspectsofourpersonalitywrotetheresearchersledbyUniversityofSouthAustralianeuroscientistTobiasLoetscherwhoseteamfollows42studysubjectsaroundtheuniversitycampusrecordingtheireyemovementsthendeterminestheirpersonalitytraits特点withwell﹣establishedquestionnairesfordeterminingpersonalitytypeaccordingtoasummaryofthestudypublishedbythesiteScienceDaily. TheresearchersfedthedataintotheirAlalgorithmsandfoundthatcomputersrunningthealgorithmswereabletorecordhumaneyemovementsandimmediatelydetermineaperson'smajorpersonalitytraitssuchasneuroticismextraversion外向agreeablenessconscientiousnessaswellasperceptualcuriositythescientistswrote. Thenewfindingscouldimprovethewayhumanbeingsinteractwiththeircomputersandotherhigh﹣techdevicesevenrobotsallowingformorenaturalandrealisticsocialinteractionswithmachinesLoetschersaid. Peoplearealwayslookingforimprovedpersonalizedservices.Today'srobotsandcomputersarenotsociallyawaresotheycannotadapttonon﹣verbalinformationLoetschersaidinastatementquotedbyIndianExpress.Thisresearchprovidesopportunitiestodeveloprobotsandcomputerssothattheycanbecomemorenaturalandbetteratinterpretinghumansocialsignals. ThestudyrevealedpreviouslyundiscoveredrelationsbetweenspecificpersonalitycharacteristicsandspecificeyemovementtendenciesaccordingtoasummaryinBritain'sDailyMailnewspaper. 1WhatdotheunderlinedwordspeerintoinParagraph2probablymean? A.understand B.stareat C.searchfor D.concernabout 2Howdidtheresearchersconducttheresearch? A.Itwascarriedoutinalab. B.42subjects'eyemovementswererecorded. C.Thestudents'dailymovementsweretracked. D.Itssubjects'personalitiesweredeterminedbycomputer. 3AccordingtoTobiasLoetscherwhatcanweknow? A.Robotsandcomputersaresociallyconscious. B.Peoplecarelessaboutimprovedpersonalizedservices. C.Today'srobotsandcomputerscanaccustomtonon﹣verbalinformation. D.Thediscoverywillimprovetheinteractionbetweenhumanbeingsandmachines. 4Whatcanbeasuitabletitleforthetext? A.HumanPersonalityTraits B.WhatHumanEyeMovementsAre C.TellPersonalitiesbyEyeMovements. D.HowHumansandMachinesInteract
Theskinundertheeyesisdelicatewhichiswhyitsometimesappearssunkenandhasdarkercoloringthanelsewhereontheface.Agingandhealthproblemsplayaroleinsunkeneyesbutotherfactorscancontributesoitmayaffectyoungerpeopleaswell. Dehydration Themostcommoncauseofsunkeneyesisdehydrationornothavingenoughwaterinthebody.Consumingtoomuchcoffeesodaandprepackageddrinksmayincreaseproductionofurine尿液whichmayleadtodehydration. Vitaminshortages ShortagesofvitaminCvitaminKandironcancauseeyestobecomesunken.VitaminChelpswithabsorbingironanddecreasingbruising瘀斑whilevitaminKisresponsibleforbloodthickeningcausingunhealthyskin.Easybruisingandunhealthyskinwillresultinsunkeneyes. Weightloss Mostpeopletendtoloseweightintheirfacefirst.Sometimestheweightlossissuddenenoughtomakebloodvessels血管belowtheeyeseasytoseeandtheskinclearproducingtheappearanceofsunkeneyes.Suddenweightlossmayalsocausenutritionalshortageswhichcanleadtosunkeneyes. Notenoughsleeporporqualitysleepcancausesunkeneyesandaperson'sDNAorthehabitofsmokingcanalsocontributetosunkeneyes.Mostcasesofsunkeneyesrelatetothequalityofanindividual'snutritionandhealthyliving.Whenthesecausesarecorrectedsunkeneyescanberesolvedwithoutfurthertreatment.Thismeansthatcausescanbeavoidedortreatedingoodtimetopreventtherecurrenceofsunkeneyes. 1Whatcanwedotopreventdehydrationaccordingtothetext? A.Refusecoffee. B.Drinkmorewater. C.Saynotosoftdrinks. D.Havecertaindrinksless. 2Whatwillleadtobruisingbelowtheeyes? A.LackofvitaminK. B.Watershortages. C.LackofvitaminC. D.Nutritionalshortages. 3Whichofthefollowingshouldbeavoidedforpeoplelosingweight? A.Palefaces. B.Suddenweightloss. C.Cleanskin. D.Narrowbloodvessels.
8分Anxietyisanaturalresponsethatchangedgraduallyovermillionsofyearstomakeusmorecarefulandourbodiespreparedtofleedanger.Butfeelinganxiousbecauseyouheardanoiseonadarkstreetisn'tthesamethingashavingananxietydisorder.Thekeythingwelookforinthecliniciswhetheranxietyisinterfering妨碍withaperson'sday﹣to﹣daylifeorcausingthemalotofunhappinesssaysNickGreyofKing'sCollegeLondon. ToclinicalpsychologistslikeGreymaladaptive不恰当的beliefsaretypicalinanxietydisordersandareoftenusedtodeterminethetypeofanxietysomeonehas.Insocialanxietydisorderthemostcommonanxietydisorderyoumightbelievethatyourfaceturningredwillresultinpeoplelaughingatyou.Peoplewiththistypeofdisorderexperienceconstantandgreatfearbeforeduringandaftersocialevents. Ifyouhavepanicdisorderyoumightassumethatyouarehavingaheartattackifyourheartstartstorace.Thephysicalsymptomsofanxiety﹣apoundingheartdifficultybreathingfeelingdizzy﹣willthencomeoninarush.Everyonecanexperiencesuchpanicattacksfromtimetotimebutinpanicdisordertheattacksareregularandbecomeasourceofanxietythemselves. Othermaladaptivebeliefsarelessspecific.Generalizedanxietydisorderischaracterizedbycontinuousworriesaboutarangeofdifferenteventsoractivitiesforatleastsixmonths.Ifyouhavethisconditionthebeliefdrivingyouranxietycouldforexamplebethefeelingit'syourjobtotakecareofotherpeopleorthatyouhaveresponsibilitiesthatyoumustmeetatallcost.TodecidewhotoreferforfurthertreatmentdoctorsmightuseatoolcalledtheGAD7test. 1Whichofthefollowingbelongstoananxietydisorder? A.Quarrelingwithparents. B.Gettingtoschoolearlier. C.Missingalunch. D.Knockingonthewall. 2Whatissocialanxietycharacterizedby? A.Continuousworries. B.Pastexperiences. C.Maladaptivebeliefs. D.Frequentterrors. 3Whatwillhappentoyouwhenyouhavepanicdisorder? A.Youcan'tstandsteadily. B.Yourfaceturnsred. C.Youcan'ttouchanything. D.Yourhandsfeelnumb. 4Whatanxietydisorderoccursmoreoftenthanothers? A.Generalizedanxiety. B.Panicattacks. C.Socialanxiety. D.Acuteanxietyattacks.
25分假定你是李华你的外国朋友Chris在电视里看到中国春运发邮件向你询问有关情况.请你回复邮件内容包括1.原因及时间 2.30多亿人次流动 3.交通方式. 注意1.词数100左右 2.可以适当增加细节以使行文连贯. 3.参考词汇春运﹣SpringFestivaltravelrush
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