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（3.00分）光滑的水平轨道AB，与半径为R的光滑的半圆形轨道BCD相切于B点，圆轨道在竖直平面内，B为最低点，D为最高点.质量为m的小球（可视为质点）以初速度v0沿AB运动恰能通过最高点，则（ ...
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高三下学期物理《2018年广东省茂名市高考物理二模试卷》真题及答案
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如图16所示水平光滑轨道AB与竖直半圆形光滑轨道在B.点平滑连接AB段长x=10m半圆形轨道半径R.
如图所示水平轨道AB与位于竖直平面内半径为R.的半圆形光滑轨道BCD相连半圆形轨道的BD连线与AB垂
如图所示光滑的水平轨道AB与半径为R.的光滑的半圆形轨道BCD相切于B.点AB水平轨道部分存在水平向
R.越大，x越大
R.越大，小球经过B.点后瞬间对轨道的压力越大
m越大，x越大
m与R.同时增大，电场力做功增大
如图所示水平光滑轨道AB与竖直半圆形光滑轨道在B.点平滑连接AB段长x=10m半圆形轨道半径R.=2
如图所示半径为R的竖直光滑半圆形轨道BC与光滑水平地面AB相切于B点弹簧左端固定在竖直墙壁上用一质量
如图所示水平面上某点固定一轻质弹簧A.点左侧的水平面光滑右侧水平面粗糙在A.点右侧5m远处B.点竖直
如图所示水平光滑轨道AB与竖直半圆形光滑轨道在B.点平滑连接AB段长x=10m半圆形轨道半径R.=2
如下图所示水平轨道AB与位于竖直面内半径为R.=0.90m的半圆形光滑轨道BCD相连半圆形轨道的BD
如图所示光滑的水平轨道AB与半径为R.的光滑的半圆形轨道BCD相切于B.点AB水平轨道部分存在水平向
R.越大，x越大
R.越大，小球经过B.点后瞬间对轨道的压力越大
m越大，x越大
m与R.同时增大，电场力做功增大
14分如图所示水平轨道AB与位于竖直面内半径为R.=0.90m的半圆形光滑轨道BCD相连半圆形轨道的
如图14所示水平光滑轨道AB与以O.点为圆心的竖直半圆形光滑轨道BCD相切于B.点半圆形轨道的半径r
如图所示ab是水平的光滑轨道bc是与ab相切的位于竖直平面内半径R.=0.4m的半圆形光滑轨道现在A
如图所示水平轨道AB与位于竖直面内半径为R.的半圆形光滑轨道BCD相连半圆形轨道的BD连线与AB垂直
如图所示水平轨道AB与位于竖直面内半径为R.的半圆形光滑轨道BCD相连半圆形轨道的BD连线与AB垂直
如图所示水平光滑轨道AB与竖直半圆形光滑轨道在B.点平滑连接AB段长x=10m半圆形轨道半径R=2.
如图所示质量为M.的小车静止在光滑的水平地面上车上装有半径为R.的半圆形光滑轨道现将质量为m的小球在
如图所示水平轨道AB与位于竖直面内半径为R.=0.90m的半圆形光滑轨道BCD相连半圆形轨道的BD连
如图所示水平光滑轨道AB与竖直半圆形光滑轨道在B.点平滑连接AB段长x=2.5m半圆形轨道半径R.=
15分如图所示质量为m的滑块在恒定外力作用下从水平轨道上的A.点由静止出发运动到B.点时撤去外力又沿
如图所示水平光滑轨道AB与竖直半圆形光滑轨道在B.点平滑连接AB段长x=10m半圆形轨道半径R=2.
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EasterisaChristianholiday.ItisalsothemostimportantfestivalinwesterncountryjustbehindChristmasDay.EasterDayisonthefirstSundayafterthefullmooninlateMarchorearlyApril.ItissaidthatJesusdiedonFriday.Afterthreedayshebecamealiveagain.Hisresurrection复活iscelebratedonthatday.ForwesternerstherearemanyactivitiestocelebrateEasternow. Alllifecomesfromanegg.Longtimeagotheeggmeantspringandanewlife.AndnowtheeggmeansJesus'reborn.Eastereggscanbringhappinesstopeople.Childrenandtheirparentsoftencoloredeggs.Theseeggsaresymbolsofpeople'goodwishes. Asweknowbunnyisthemostfertility多产的animalsanditmeansthenewlifeinspring.Asmessengers报信员tosendeggsrabbitsarepopularwithchildren.OnEasterDaychildrenwillreceivegiftslikerabbits.SopeoplegivetherabbitsacutenamethatisEasterBunny.EggHuntingisagamethateggsarehiddeninsomeplacesforchildrentofind.ItissaidthatEasterBunnyhideggsintheroomorthegrassandletkidstofind.OnthatdayChildrenhuntfortheeggsallaroundthehouse.PeopleholdEasteregghuntsandthechildwhofindsthemosteggswinsaprize. OnEasterDaypeopleofteneatmeatmainlylambandham.Theyallhaveacertainmeaning.Lambmeansthedevotion献身toChrist.PeopleeatEasterbreadtoo.TheEasterbreadpaintedthewordsofcrossesinordertocommemorate纪念Christ. OnEasterDaypeopledressupandgoout.Theywalkaroundthetown.NowmanypeoplewalkinEasterparades游行toshowandseenewspringclothesespeciallyhats.Thenewclothesareasymbolofnewlife. WhenpeoplemeetonEastertheyoftengreeteachotherwith“HappyEaster!TheLord'srisen!” 根据短文内容判断正T误F. 81.ChristmasDayismoreimportantthanEasterinwesterncountry. 82.EasterDayisonthefirstSaturdayafterthefullmooninlateMarchorearlyApril. 83.Whenchildrenplayegghuntingthechildwhofindsthemosteggswinsaprize. 84.OnEasterDaypeopleonlyeatlambhamandbreadwithwordsofcrosses. 85.ManypeoplewalkinEasterparadestoshowandseenewspringclothesbecausetheyarealsoasymbolofnewlife.
篆刻刀的刀口做的锋利是为了压强大气压随高度的增加而以上两空均选填“增大”或“减小”或“不变”
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Therewasonceanoldanddeepwell.Peoplegotwaterbydroppingabucket木桶tiedtoarope.Theropepassedoverawheeljustabovethewell.Ontheothersideoftheropewasanotherbucket. Astrongpullbroughtonebuckettothetopwhiletheotherdowntothewater.Theyalwayspassedeachotheronthewayupanddownbutneverhadtimetospeak. Atlasttheropebecameworn破损的.Soanewropehadtobeputinitsplace.Whilethiswasbeingdonethetwobucketswereleftstandingtogethernearthewell. “Whataboringlifewehave!”saidonebuckettotheother.“Iamquitetiredofit.Nomatterhowfullwecomeupwearealwayssentdownempty.” Buttheotherbucketlaughedandsaid“Whatafunnywayyouhaveoflookingatthings!Don'tyouseethatwheneverwearesentdownemptywealwayscomeupfull?” Boysandgirlssometimestalklikethesetwobuckets.Youmayhearoneofthemsay“Justaswearehavingagoodgamewearemadetostopandgotoworkagain.”“Yes”theotherwillreply“butassoonasworkisoverwealwaysgettogooutandhavefunagain.” Therearetwowaysoflookingatthings.Ifwewanttobehappylookatthebrightside. 根据短文内容回答下列问题. 91.Howdidpeoplegetwater? 92.Whydidtheyputanewropeintheoldone'splace? 93.Wheredidthetwobucketstalkwitheachother? 94.Didtwobucketslookatthingsinthesameway? 95.Whatcanwelearnfromthestory?
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高三下学期物理
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