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如图所示，介质1、真空、介质2相互间隔，它们的各个界面为一组同心圆，圆心为O，一束细单色光从介质1的下界面的A点入射到真空，入射角为θ，经过介质2的上表面B点后恰好在其下表面C处发生全反射，己知两介...
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高三下学期物理《》真题及答案
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2013江苏南京盐城一模半球形介质截面如图所示O.为圆心单色光ab相互平行从不同位置进入介质光线a在
如图所示一透明介质制成的直角三棱镜顶角∠A.＝30°一束光由真空垂直射向AC面经AB面射出后的光线偏
如图所示相互平行的平面Ⅰ和Ⅱ为两种光介质的分界面两平面外为介质1两平面间为介质2一单色光以一定的入射
若n
1
2，此光线可能在界面Ⅱ上发生全反射
若n
1
2，此光线一定在界面Ⅱ上发生全反射
若n
1
>n
2
，此光线可能在界面Ⅰ上发生全反射
若n
1
>n
2
，此光线一定在界面Ⅰ上发生全反射
如图所示一透明介质制成的直角三棱镜顶角∠A.=30°一束光由真空垂直射向AC面经AB面射出后的光线偏
一束单色光从真空斜射向某种介质的表面光路如图所示由此可知介质的折射率等于___________
如图所示MN是两种均匀介质的分界面已知两种介质其中一侧是空气.一束光从介质A.进入介质B.则入射角为
如图所示某列波以60°的入射角由甲介质射到乙介质的界面上同时产生反射和折射若反射波的波线与折射波的波
如图所示透明介质球的半径为R.光线DC平行于直径AB射到介质球的C.点DC与AB的距离1试证明DC光
如图所示透明介质球的半径为R.光线DC平行直径AB射到介质球的C.点DC与AB的距离H=0.8R1试
如图所示红光和紫光分别从介质1和介质2中以相同的入射角射到介质和真空的界面发生折射时的折射角也相同请
2013江苏南京盐城一模半球形介质截面如图所示O为圆心单色光ab相互平行从不同位置进入介质光线a在O
2016年·大连一模一个横截面为∠MON形状的透明介质将它放在真空中如图所示光线从OM界面的P点以入
如图所示透明介质球球心位于O.半径为R.光线DC平行于直径AOB射到介质的C.点DC与AB的距离若D
光从介质1通过两种介质的交界面进入介质2的光路如图所示下列论述①光在介质1中的传播速度较大②光在介质
只有①③正确
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只有②③正确
只有②④正确
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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.
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如图所示闭合金属线框abcd位于水平方向匀强磁场的上方h处由静止开始下落并进入磁场在运动过程中线框平面始终和磁场方向垂直不计空气阻力那么在线框进入磁场过程中线框
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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
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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
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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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