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竖直平面内有一固定的粗糙圆轨道,有一质量为m的滑块以某一初速度从最低点进入轨道并能做完整的圆周运动,若已知滑块运动至圆周最低点A和最高点B时对轨道的压力差为7mg,圆的半径为R,滑块与圆轨道间的动摩...
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高三下学期物理《》真题及答案
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如图所示在竖直平面内有一固定轨道其中AB是长为R.的粗糙水平直轨道BCD是圆心为O.半径为R.的3/
点由静止开始做匀加速直线运动,到达
点时即撤去推力,小滑块恰好能沿圆轨道经过最高点
重力加速度大小为g.则小滑块 A. 经B.点时加速度为零 B. 在AB段运动的加速度为2.5g C. 在C.点时合外力的瞬时功率为
上滑时动能与重力势能相等的位置在OD上方
如图质量为M.的小车静止在光滑水平面上小车AB段是半径为R.的四分之一圆弧光滑轨道BC段是长为L.的
如图所示半径R=2m的四分之一粗糙圆弧轨道AB置于竖直平面内轨道的B.端切线水平且距水平地面高度为h
如图所示在竖直平面内有一固定轨道其中AB是长为R.的粗糙水平直轨道BCD是圆心为O.半径为R.的3/
点由静止开始做匀加速直线运动,到达
点时即撤去推力,小滑块恰好能沿圆轨道经过最高点
。重力加速度大小为g,取AB所在的水平面为零势能面。则小滑块A.在AB段运动的加速度为2.5g B.经B.点时加速度为零
′C.在C.点时合外力的瞬时功率为mg
D.上滑时动能与重力势能相等的位置在直径D.D.′上方
2013·北京朝阳一模22题16分如图所示ABCD为固定在竖直平面内的轨道其中ABC为光滑半圆形轨道
如图所示半径R=2m的四分之一粗糙圆弧轨道AB置于竖直平面内轨道的B端切线水平且距水平地面高度为h=
如图所示半径R=2m的四分之一粗糙圆弧轨道AB置于竖直平面内轨道的B.端切线水平且距水平地面高度为h
如图所示的轨道由位于竖直平面的圆弧轨道和水平轨道两部分相连而成.水平轨道的右侧有一质量为2m的滑块C
如图所示ABC为固定在竖直面内的光滑四分之一圆轨道其半径为r=10mN.为固定在水平面内的半圆平面其
如图所示在竖直平面内有一固定轨道其中AB是长为R.的粗糙水平直轨道BCD是圆心为O.半径为R.的3/
点由静止开始做匀加速直线运动,到达
点时即撤去推力,小滑块恰好能沿圆轨道经过最高点
重力加速度大小为g.则小滑块( )
A.经B.点时加速度为零 B.在AB段运动的加速度为2.5g C.在C.点时合外力的瞬时功率为
上滑时动能与重力势能相等的位置在OD上方
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.点竖直放置一半
如图所示竖直平面内有四分之一圆弧轨道固定在水平桌面上圆心为O.点一小滑块自圆弧轨道A.处由静止开始自
如图所示在水平向左匀强电场中有一光滑半圆绝缘轨道竖直放置轨道与一水平绝缘轨道MN在N.点连接半圆轨道
12分如图所示半径R=2m的四分之一粗糙圆弧轨道AB置于竖直平面内轨道的B.端切线水平且距水平地面高
在竖直平面内有一个粗糙的圆弧轨道其半径R=0.4m轨道的最低点距地面高度h=0.8m.一质量m=0.
如图所示在距水平地面高为h处有一半径为R.的1/4圆弧轨道圆弧轨道位于竖直平面内轨道光滑且末端水平在
如图所示在竖直平面内有一固定轨道其中AB是长为R.的粗糙水平直轨道BCD是圆心为O.半径为R.的3/
点由静止开始做匀加速直线运动,到达
点时即撤去推力,小滑块恰好能沿圆轨道经过最高点
。重力加速度大小为g,取AB所在的水平面为零势能面。则小滑块
A.在AB段运动的加速度为2.5g B.经B.点时加速度为零 C.在C.点时合外力的瞬时功率为mg
上滑时动能与重力势能相等的位置在直径DD′上方
如图所示ABCD为固定在竖直平面内的轨道其中ABC为光滑半圆形轨道半径为R.CD为水平粗糙轨道一质量
半径为R=0.9m的光滑半圆形轨道固定在水平地面上与水平面相切于A.点在距离A.点1.3m处有一可视
如图所示在竖直平面内有一固定轨道其中AB是长为R.的粗糙水平直轨道BCD是圆心为O.半径为R.的3/
点由静止开始做匀加速直线运动,到达
点时即撤去推力,小滑块恰好能沿圆轨道经过最高点
重力加速度大小为g.则小滑块() A.经B.点时加速度为零 B.在AB段运动的加速度为2.5g C.在C.点时合外力的瞬时功率为
上滑时动能与重力势能相等的位置在OD上方
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2分ItalsobeingthemostmulticulturalstateintheUSAhavingattractedpeoplefromallovertheworld.Thecustomsandlanguagesoftheimmigrantsliveonintheirnewhome.isnotsurprisingwhenyouknowthehistoryofCalifornia.
25分假如你是__.你收到了你在英国的笔友Charlie的来信他在信中询问你的暑假计划请就你的暑假计划给他写一封回信 1.表示收到来信的心情 2.去乡下看望祖父母 3.去电脑培训中心学电脑时间为一星期 4.读一些英语书籍但不知该读那些请对方提些建议 5.向对方父母问好盼望回信. 注可适当增加内容词数为100左右 DearCharlie Howareyou? Yours LiQiang
用3种不同颜色给2个矩形随机涂色每个矩形涂且只涂1种颜色则2个矩形颜色不同的概率为
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短文.短文中共有10处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∧并在此符号下面写出该加的词. 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. Buildingagoodrelationshipwithourteachersbenefitusall.Teachersshowedloveconcernandunderstandforusstudentsinstudyandlife.Westudentscanalwaysseeksupportandadvicefromus.InthiscaseanidealrelationshipisofVitalimportant.Inmyopinionthisrelationshipshouldbeonefillingwithloveandrespectsowecanexchangeideasfreewithteachers.Ifwestudentstrustteachersandexpressourfeelingsclearlyortheywillbecomeourfriend.Onlythroughconstanteffortsweenjoyawarmrelationshipbetweenteachersandstudents.
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每处错误仅涉及一个单词的增加删除或修改. 增加在缺词处加一个漏词符号^并在此符号下面写出该加的词. 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. WhenIwasinhighschoolIseldomhadachancetohelpmyparentsinthehousework.FeltquitesorryforthatIwonderedwhattodotohelp.Onedaymyparentswentoutshopping.Isuddenlygotanideawhynottogivetheapartmentathoroughlyclean?Ibeganbyputtingallthebooksnewspapersandanotherthingsinplace.ThenIwipedthedustoffthefurnitures.AfterthatIsweptandmopthefloor.Whenmyparentscamebacktheyweresurprisingtofindalltheroomstidy.Mymothergavemehug.TiredasIwastheyfeltveryhappy.
30分Onsomespecialoccasionsinyourlifeyoumayfindyourselffacedwithvariouschoices.You'veprobablybeenaskedwhatyouwoulddoifyoufoundaleather1fullofcash.Wouldyoukeepitturnitintothepoliceoraskfora2?WoralopatrampfromThailandonlyhad9baht铢tohisnamewhenhefounditwith20000bahtandseveralcredit3init. Itwasmorethan4tobuyhimfoodandevenaplacetostayforweeks.5hedidn'tthinkaboutkeepingit.Heranaftertheownerto6itafterseeinghim7itbymistake.Hewasn'tabletorunfastenoughto8themansohewentstraighttothenearestpolicestationto9itover. TheownerNityhadn'teven10hehadlostthingsofhisownwhenthepolicecalledtotellhimtheyhadit.Whenhelearnedthata11manhadturneditinandsawthatallthemoneyandthecardswerestillinsidehewasmorethan12.Theowneradmittedthatifhehadnomoneyheprobablywouldhavekeptit.Whatan13personWoralopwas! Althoughhe14gaveWoralopa2000bahtNitylaterdecidedtoalso15themanajobathisfactoryinBangkok.AsamatteroffactWoralopwasmorethanhappyto16it.Itcomeswitha11000baht17andgoodaccommodation. Thesocialmediahasalreadystartedposting18ofWoralopathisnewjob.Woralopissuchagoodexamplethatbeingfriendlyreallydoes19.Whenyou're20toothersothershavethesamewaythatyoutreatthem. 1A.vest B.whistle C.garment D.wallet 2A.gift B.reward C.award D.leave 3A.anecdotes B.allowances C.cards D.certificates 4A.enough B.possible C.suitable D.valid 5A.Therefore B.However C.Moreover D.Besides 6A.accelerate B.arrest C.return D.reform 7A.dropping B.interrupting C.hiring D.bothering 8A.comeupwith B.teamupwith C.fedupwith D.catchupwith 9A.watch B.hand C.take D.turn 10A.admitted B.assumed C.noticed D.introduced 11A.homeless B.hopeless C.stainless D.worthless 12A.satisfied B.alarmed C.surprised D.embarrassed 13A.dynamic B.honest C.disgusting D.shabby 14A.eventually B.frequently C.gradually D.initially 15A.offer B.desire C.elect D.declare 16A.overcome B.conduct C.accept D.receive 17A.cost B.salary C.guarantee D.privilege 18A.catalogues B.videophones C.microscopes D.photos 19A.takein B.takeoff C.payoff D.payback 20A.kind B.mean C.outgoing D.competent
已知组数据x1x2…xn的平均数为2方差为5则数据2x1+12x2+1…2xn+1的平均数与方差s2分别为
8分MaryKrupabecamefriendswiththegreysquirrelsduringherfirstweekatPennStateafterspottingthemrunningaroundandidly漫不经地wonderingwhattheywouldlooklikewithtinyhatsontheirheads.TodayeveryoneattheuniversityknowsherastheSquirrelGirl. Marystartedbringingthemfoodandgraduallytheybegantotrusther.Shemanagedtoputahatonasquirrelandtakeapicture.ThinkingthathercolleaguescoulddowithsomethingtoliftuptheirspiritsshestartedpostingsimilarPhotosonFacebook.TheresponseWasgreatlypositiveandbeforelongMaryandhersquirrelsbecameanInternetsensation. GrowingupinaneighborhoodoutsideStateCollegeMarywasalwaysfondofbirdsandanimalsaroundherhomebutshedidn'tinteractwithpeopleverymuch.ShewaslaterdiagnosedwithAsperger'ssyndromebutthesquirrelschangedthat.ThesquirrelsareactuallyagoodwaytobreaktheicebecauseI'llbesittingherepattingasquirrelandotherpeoplewillcomeoverandwelljuststartlikefeedingthesquirrelstogetherandchattingaboutthemshesaid.Iamalotmoreoutgoing. Andincaseyou'rewonderinghowMaryisabletogetthesquirrelstodowhatshewantsforherphotosithasalottodowithfood.Forexamplewhenevershewantsthemtoholdorplaywithsomethingsheputspeanutbutterontheprop道具andthey'llgrabit.Butgettingtothatparttookawhile.Inthebeginningshewouldthrowpeanutsupthetreesoncampusandinvitethesquirrelstocomedownandgetthembuttheyhesitatedtoapproachher.Shehadthepatiencetoearntheirtrustthough. ThisyearMaryisgraduatingwithadegreeinEnglishandwildlifesciences.Shewantstobeasciencewriterandeducatepeopleonhowtopreservetheenvironment.AsforherfurryfriendsMaryplanstostayintheareaandvisitthemasoftenasshecan. 1WhatkindofchangedosquirrelsbringtoMary? A.Sheissickerthanbefore. B.Sheismoreinterestedinanimals. C.Sheismoresociablethanbefore. D.Sheislesswillingtogotocollege. 2HowdidMarymanagetotakephotosofsquirrelswearinghats? A.Byputtingthemincages. B.Byplayingmusictothem. C.Byattractingthemwithcolorfulfood. D.Bybuildingacloserelationshipwiththem. 3WhichwordscanbestdescribeMary? A.Patientandcaring. B.Confidentandstrong. C.Sociableandhealthy. D.Traditionalandhard﹣working. 4Whatcanbethebesttitleforthetext? A.Mary'sexperienceinuniversity B.Makingfriendswithwildanimals C.TheSquirrelGirlofPennState D.ThebridgebetweenMaryandsquirrels
25分假设你是李华你的朋友Peter邀请你周日到他家参加一场party但是你不能参加请根据以下要点写一封100词左右的道歉信. 要点 1.你要准备半期考试 2.你感冒了 3.希望考试后再聚 注意 1.词数100左右 2.可以适当增加细节以使行文连贯 3.开头和结语已为你写好. DearPeter . Sincerelyyours LiHua.
8分Upto90%ofschoolleaversinmajorAsiancitiesaresufferingfrommyopia﹣short﹣sightednessastudysuggests.Researcherssaytheextraordinaryrise''intheproblemisbeingcausedbystudentsworkingveryhardinschoolandmissingoutonoutdoorlight. Eyeexpertssaythatyouareshort﹣sightedifyourvisionisblurred模糊的beyond2m.Itisoftencausedbyanelongation拉抻oftheeyeballthathappenswhenpeopleareyoung.Accordingtotheresearchtheproblemisbeingcausedbyacombinationoffactors﹣﹣acommitmenttoeducationandlackofoutdoorlight. ProfessorMorganwholedthisstudyarguesthatmanychildreninSouthEastAsiaspendlonghoursstudyingatschoolanddoingtheirhomework.Thisinitselfputspressureontheeyesbutexposuretobetweentwoandthreehoursofdaylighthelpsmaintainhealthyeyes. Culturalfactorsalsoseemtoplayapart.AcrossmanypartsofSouthEastAsiachildrenoftenhavealunchtimenap.AccordingtoProfessorMorgantheyaremissingoutonnaturallighttopreventshort﹣sightedness. Abigconcernisthenumberofthestudentssufferingfrom‘‘highmyopia.Oneinfiveofthesestudentscouldexperienceseverevisualimpairment障碍andevenblindness.Thesepeopleareatconsiderablerisk﹣sometimespeoplearenottoldaboutitandarejustgivenmorepowerfulglasses﹣theyneedtobewarnedabouttheriskandgivensomeself﹣testingmeasuressotheycangettoallophthalmologistandgetsomehelp. Fordecadesresearchersbelievedtherewasastronggeneticcomponenttothecondition.Butthisstudystronglysuggestsallalternativeview.‘‘Anytypeofsimplegeneticexplanationjustdoesn'tfitwiththatspeedofchangegenepoolsjustdon'tchangeintwogenerations.Whetherit'sapurelyenvironmentaleffectoranenvironmentaleffectplayingasensitivegenome基因组itreallydoesn'tmatter.Thethingthat'schangedisnotthegenepool﹣it'stheenvironment. 29.Asismentionedabovewhichfactormainlyresultsinstudents'myopiainSouthEastAsia? A.Geneticfaultsofthepeople. B.Visualimpairmentandblindness. C.Theshortageofoutdoorlight. D.Lackofresearchintotheproblem. 30.WhichofthefollowingstatementsdoyouthinkagreeswithProfessorMorgan? A.Alunchtimenapishelpfulinreducingmyopia. B.Glasseskeepmyopiafromgettingevenworse. C.It'snecessarytotreatmyopiawithanoperation. D.It'sofvitalimportancetoreduceeducationalpressure. 31.What'sthemainideaofthelastparagraph? A.Generemainsthemaincauseofthelong﹣standingproblem. B.Theenvironmentistoblamefortheextraordinaryriseinmyopia. C.Short﹣sightednesshasnothingtodowithchangesingenepools. D.Anenvironmentaleffectplayingasensitivegenomecounts. 32.What'sthebestwaytotakecareofyoureyesaccordingtothepassage? A.Equiptheclassroomwithbetterlights. B.LookattheSunfromtimetotime. C.Doeyesexerciseregularly. D.Spendmoretimeintheopenair.
8分My3﹣year﹣oldsonandIlivedaveryhardlifebecauseIhadbeenoutofworksincetwoyearsago.Beingpoorisaterriblefeelingwhenyour3﹣year﹣oldfinisheshismealandsaysCanIhavesomemorebreadandjampleaseMummy?Andyoubreakdownintearsbecauseyoudon'tknowhowtotellhimthatthereisnomorefood.With£6Iwenttothesupermarketpickedupsomefoodandstartedtocookathome.Itwastimeformetomakeachangeandgetbackonmyfeet.IbegantowriteaseriesofarticlesforthewebsitenamedHungerHurtinJuly2011. Afewmonthslaterlocalfoodbankgavemesomehelp﹣﹣withsomefreevegetableseverymonthwhichmademylifealittleeasier.Ibegantowriterecipespostingthemonmyblog.Tomysurprisefamiliesstudentsandthosepoorpeopletoldmehowmuchithelpedtoseehealthyrecipesmadefromaffordablesupermarketvegetables. MyLifetookunexpectedturns.IwasinvitedtogiveaspeechonfoodinterviewedforanOxfamreportonfoodbanksandaskedtowriteacookerybook. WhenIgotthemoneyfromthebookforthefirstnightinalmosttwoyearsIwenttobedwithoutworrying.NowIhaveawell﹣paidjobandabeautifulhomeandI'llneverforgetthedayswhenIworkedhardforagoodlife. 1Thewriterstartedtocookbecause. A.thefoodatthesupermarketwasunhealthy B.shewasadvisedtodosobysomeone C.shehadtofeedthemselvesinacheapway D.hersonpreferredhome﹣cookedfood 2Accordingtothetextthefoodbank. A.helpssellthefoodinsupermarkets B.bringspeopletogetherwhocareaboutfoodwaste C.givesoutfoodtothosepeoplewhoareinneed D.writehealthyrecipestofoodloversaroundtheworld 3Thewriter'sfirstpostofrecipes. A.attractedonlyhousewives B.wasgivenlittlenotice C.movedthereaders D.drewmuchattention 4Whichcouldbethebesttitle? A.Successliesinyourownhands B.Alessonhardlifeteachesme C.Amother'sdreamjob D.whatalovingmother
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8分Someofthebestresearchondailyexperienceisrootedinratesofpositiveandnegativeinteractionswhichhasprovedthatbeingblindlypositiveornegativecancauseotherstobefrustratedorannoyedoreventotuneout. Overthelasttwodecadesscientistshavemaderemarkablepredictionssimplybywatchingpeopleinteractwithoneanotherandthenscoringtheconversationsbasedontherateofpositiveandnegativeinteractions.Researchershaveusedthefindingstopredicteverythingfromthelikelihoodthatacouplewilldivorcetothechancesofaworkteamwithhighcustomersatisfactionandproductivitylevels. Morerecentresearchhelpsexplainwhythesebriefexchangesmattersomuch.Whenyouexperiencenegativeemotionsasaresultofcriticismorrejectionforexampleyourbodyproduceshigherlevelsofthestresshormonewhichshutsdownmuchofyourthinkingandactivatesconflictanddefensemechanisms机制.Yousupposethatsituationsareworsethantheyactuallyare. Whenyouexperienceapositiveinteractionitactivatesaverydifferentresponse.Positiveexchangesincreaseyourbody'sproductionofoxytocin后叶催产素afeel﹣goodthatincreasesyourabilitytocommunicatewithcooperatewithandtrustothers.Buttheeffectsofapositiveoccurrencearelessdramaticandlastingthantheyareforanegativeone. Weneedatleastthreetofivepositiveinteractionstooutweigheveryonenegativeexchange.Badmomentssimplyoutweighgoodones.Whetheryou'rehavingaconversationkeepthissimpleshortcutinmindAtleast80percentofyourconversationsshouldbefocusedonwhat'sgoingright. Workplacesforexampleoftenseethis.Duringperformancereviewsmanagersroutinelyspend80percentoftheirtimeonweaknessesandareasforimprovement.Theyspendroughly20percentofthetimeonstrengthsandpositiveaspects.Anytimeyouhavediscussionswithapersonorgroupspendthevastmajorityofthetimetalkingaboutwhatisworkingandusetheremainingtimetoaddressweaknesses. 1TheunderlinedphrasetuneoutinParagraph1probablymeans. A.gaincourage B.stoplistening C.singaloud D.feelstressed 2Whatwillhappenifyouexperiencenegativeemotions? A.Muchofyourthinkingwillbeprevented. B.Thesituationsaresuretobecomeworse. C.Youwillfeelanurgetoimproveandbecomebetter. D.You'llbemotivatedtoresolveconflictswithpeople. 3FromParagraph4wecanlearnthat. A.weneedapositivefeelingtobeatonenegativefeeling B.theeffectofnegativefeelingslastslongerthanthatofpositiveones C.ourconversationshouldcenteronwhatneedsimprovement D.positiveinteractionshavegreatereffectsthannegativeones 4Whatisthebesttitleforthepassage? A.HarmfulNegatives. B.LessTimeonStrengthsandPositiveAspects. C.HowtoBeaProductiveManager. D.MorePositiveInteractions.
两直角边分别为1的直角三角形绕其斜边所在的直线旋转一周得到的几何体的表面积是
△ABC中===在下列命题中是真命题的有
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15分BorninItalyGalileoGalileiwasaTuscanastronomerphilosopherandphysicist.Heiscloselyassociatedwiththe61sciencerevolution.Forhisgreat62achievementhehasbeenreferredtoasthefatherofmodemastronomy.TheworkofGalileo63considertobeasignificantbreakfromthatofAristotle.InadditionhisconflictwiththeRomanCatholicChurchistakenas64majorearlyexampleoftheconflictofauthorityandfreedomofthoughtparticularlywithscienceinWesternsociety.Hewasaman65experimented﹣neverdidhetakeanythingforgranted.Insteadhedespised蔑视theprejudicesandbooklearningoftheAristoteliansanddrewhisconclusion66fear.Hehadbeenthefirst67turnatelescopetotheskyandhehadseenthereevidenceenoughtooverthrowAristotleandPtolemytogether.AlthoughGalileofounditdifficulttomakepeople68convinceofhistheorieshestillstuck69hisviews.Hisobservationsshowedthetheorythattheearth70movearoundtheSunwasright.Itwasonlymanyyearslaterthattheworldrecognizedhisgreatness.
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1分Theboystoodontheplaygroundhoverwhethertojointhegameornotandafraidofbeingturneddown.
2分Wehavefoundhumanandanimalbonesinthosecaveshigherupthehillaswellastoolsandotherobjects.Sowethinkitistheylivedinthesecaves.
8分Itwasoneofthehottestdaysofthedryseason.Wehadnotseenraininalmostamonth.Thecropsweredying.Cowshadstoppedgivingmilk.Thestreamswerelonggonebackintotheearth.Ifwedidn'tseesomerainsoonwewouldloseeverything. IwasinthekitchenmakinglunchformyhusbandandhisbrotherswhenIsawmysix﹣year﹣oldsonBillywalkingtowardthewoods.Hewasobviouslywalkingwithagreateffort…tryingtobeasstillaspossible.Minutesafterhedisappearedintothewoodshecamerunningoutagaintowardthehouse. Momentslaterhoweverhewasonceagainwalkinginthatslowpurposefullongsteptowardthewoods.Thisactivitywentonforoveranhourwalkingverycarefullytothewoodsthenrunningbacktothehouse.Finallymycuriositygotthebestofme.Iquietlywalkedoutofthehouseandfollowedhimonhisjourney. Hewascuppingbothhandsinfrontofhimashewalkedbeingverycarefulnottospill洒出thewaterheheldinthem.Branchesandthornsslappedhislittlefacebuthedidnottrytoavoidthem.Hehadamuchgreaterpurpose.AsIlookedathimsecretlyIsawthemostamazingsite. Severallargedeerappearedthreateninginfrontofhim.ButBillywalkedrightuptothem.Ialmostscreamedforhimtogetaway.AndIsawababydeerlyingonthegroundobviouslysufferingfromheavylossofwaterandheatexhaustionliftitsheadwithgreatefforttolapupthewatercuppedinmybeautifulboy'shand. IstoodontheedgeofthewoodswatchingthemostbeautifulheartIhaveeverknownworkingsohardtosavealife.Asthetearsthatrolleddownmyfacebegantohitthegroundtheyweresuddenlyjoinedbyotherdrops…andmoredrops…andmore.Ilookedupatthesky.ItwasasifGodhimselfwascryingwithpride. 21.Whydidtheauthorfollowherson? A.Becausetheremightbedanger. B.Becausehersonwasdoingagooddeed. C.Becauseshewascurious. D.Becausesheintendedtohelp. 22.WhichofthefollowingstatementsisNOTtrueaccordingtothepassage? A.Rainwasingreatneedatthetime. B.Billycarriedwaterwithhissmallhands. C.Therewerefewtreesinthewoods. D.Billywalkedintothewoodsmanytimes. 23.Whichisthecorrectorderofthedevelopmentofthestory? ①Theauthorwasmovedtotears. ②Billyfedthewatertothebabydeer. ③Billywalkedtowardsthelargedeer. ④Itbegantorain. ⑤TheauthorfollowedBillyintothewoods. A.⑤③②①④ B.③②⑤①④ C.④①③②⑤ D.⑤②①③④ 24.Whichofthefollowingisthebesttitleforthepassage? A.ImportanceofWater B.TheWaterofLife C.HowtoSaveAnimals D.AnimalsinDanger.
若z=3+4i则=.
10分 TheArtofSlowReading IfyouarereadingthisarticleinprintchancesarethatyouwillonlygetthroughhalfofwhatIhavewritten.Andifyouarereadingthisonlineyoumaynotevenfinishafifth.1Theysuggestthatmanyofusnolongerhavetheconcentrationtoreadarticlesthroughtotheirconclusion. Soarewegettingstupider?Actuallyouronlinehabitsaredamagingthementalpowerweneedtoprocessandunderstandtextualinformation.Round﹣the﹣clocknewsmakesusreadfromonearticletothenextwithoutnecessarilyengagingfullywithanyofthecontent.OurreadingisfrequentlystoppedbythenoiseofthelatestemailandwearenowabsorbingshortburstsofwordsonTwitterandFacebookmoreregularlythanlongertexts.2Butwearegraduallyforgettinghowtositbackthinkcarefullyandrelateallthefactstoeachother. 3Adesperatebunchofacademicswantustotakeourtimewhilereadingandre﹣reading.Theyaskustoswitchoffourcomputerseverysooftenandrediscoverboththejoyofpersonalengagementwithprintedtextsandtheabilitytoprocessthemfully.What'stobedonethen?Mostslowreadersrealizethattotalrejectionofthewebisextremelyunrealistic.Theyfeelthatgetawayfromtechnologyforawhileistheanswer.4 PersonallyI'mnotsurewhetherIcouldevergoofflineforlong.EvenwhilewritingthisarticleIamswitchingconstantlybetweensitesskimmingtoooftenabsorbingtoolittle.Internetreadinghasbecometoorootedinmydailylifeformetochange.IreadessaysandarticlesnotinhardcopybutasPDFs.Isuspectthatmanyreadersareinasimilarposition.5YoucandownloadacomputerapplicationcalledFreedomwhichallowsyoutoreadinpeacebycuttingoffyourInternetconnection.OrifyouwanttoavoidbeingdisturbedbytheInternetyoucouldalwaysdownloadofflinereaderInstapaperforyouriPhone.Ifyou'restillreadingmyarticlethatisslowreading. A.TheInternetisprobablypartoftheproblem. B.Nowsomecampaignsareadvocatingslowreading. C.Butifyoujustoccasionallywanttoreadmoreslowlyhelpisathand. D.Thesearethetwofindingsfromtherecentresearchprojects. E.BecauseoftheInternetwehavebecomeverygoodatcollectinginformation. F.Slowreadingcanhelpconnectareadertoneighborhoodandbecomepopular. G.Someofthemhavesuggestedturningtheircomputersoffforonedayaweek.
8分GrowingupinWyomingeverydaylifewasanadventure﹣Ispentmytimecampingandexploringmountains.WhenIwaslittlemymombecamethestate'sfirstfemaleU.S.Marshall.I'llneverforgethowthelocalnewspaperpraisedherforhersuccessinafieldthat'straditionallyrunbymen.UnderherinfluenceImadeupmymindtoachievesomethinggreat.NowI'vebecomefamousforsailingasportoftenconsideredaman'sworld. Sailingisconsideredahard﹣to﹣break﹣intosport.Andgenerallythereareonlytwowaystogetintoit﹣eitherthroughastrictsailingeducationthatleadstoexperienceorbygrowinguponthewaterandracingintheOlympics.MostofmyteammatesbecameprofessionalsailorsinoneofthesetwowaysbutIskippedboth. Inthesummerof2008IwenttoSt.Croixthroughacollegeinternship实习programfocusingoneducatinglocalsaboutHIVandAIDs.ThereIdiscoveredmyloveforsailing.ThenSCAaglobalhygiene卫生保健companymadethedecisiontosupportanall﹣femaleteamandwhentheybeganacceptingapplicationsIknewitwasthechanceofalifetime.Imadeitmytasktobecomeapartoftheteam.EvenwhenitseemedliketherewerenopositionsleftInevergaveup. Afterastressfultwo﹣yearapplicationprocessIfinallygotthecall.ImovedtoLanzaroteintheCanaryIslandsandbegantrainingwiththeteamimmediately.TheprocesswasphysicallymentallyandemotionallyexhaustingbutIfinallyachievedmygoal.IsailedintheEverestofsailingwithonlysixyears'experience.Latertherewasanall﹣femaleteamcompetingandIwasluckyenoughtobeapartofit. Aswomenweneedtoapproachourdreamsasifwedeservetoachievethemasmuchasmenbecausewedo.Thereareplentyofprofessionsincludingsailinginwhichwomenareabsentorhaveaminorpresence﹣butthat'snotbecausetheyshouldn'tbethere.Weneedtopushtheboundariesandfocusonobtainingourgoalsandpassionsnomatterhowunobtainableandchallengingtheymayseem. 1WhydoestheauthormentionhermotherinParagraph1? A.Tocomparewithhermother. B.Todescribewomen'sstruggles. C.Toanalyzehermother'ssuccess. D.Toshowhermother'sinfluenceonher. 2whatdoestheunderlinedwordbothinParagraph2probablyreferto? A.Twotraditionalwaystobecomeprofessionalsailors. B.Twoimportantpersonsintheauthor'slife. C.Twobasicstagesofbeingasailor. D.Twofamousprofessionalsailors. 3Whatisthecorrectorderofthefollowingevents? a.Ibegantrainingwiththesailingteam. b.Iattendedacollegeinternshipprogram. c.Itookpartincompetinginanall﹣femaleteam. d.Idiscoveredmyloveforsailingasawoman. A.b﹣d﹣a﹣c B.d﹣a﹣c﹣b C.a﹣c﹣d﹣b D.a﹣d﹣c﹣b 4Whichcanbestdescribetheauthor? A.Humorous. B.Generous. C.Pessimistic. D.Determined.
10分Identitytheftisarousingincreasingattentionfromthepublic.36Whenyouridentityisstolenthethiefoftendoesfraud诈骗withthat.Hemaygetacreditcardinyournameandspenditcarelesslywithoutpayingthebills.Hemaygetadriver'slicenseinyournameandyouwillbeheldresponsibleforthetrafficaccidentshecauses. WhyisidentitytheftbecomingSOcommon?37AndthewealthofprivatedetailspeoplepostonsocialnetworkssuchasFacebookalsomakesiteasierforidentitythievestoobtainprivateinformation. Manypeoplearenotawareoftheproblemscausedbythecrime.38 39ThisiswhyitisofimportancethateverypersonshouldbecomecautiouswhenusingtheInternet.Thefollowingtipsmaypreventyoufromidentitytheft. Firstmakesureyourcomputerhasanupdatedanti﹣virusandfirewallsysteminstalled.Second40Yourdateofbirthnamesofschoolsattendedphonenumberorthenamesofyourparentsareoftenrequiredtoverifyanidentityandthievescanusethisinformationtoo.Lastbutnotleastcreatecomplexpasswordsusingacombinationofnumbersandkeyboardsymbolsandchangeyourpasswordsonaregularbasis. A.AgatewayisofferedfortheidentitytheftbythepopularityoftheInternetandcomputers. B.Giveawayyourprivateinformationonsocialnetworkingsites谢也theutmostcaution. C.Thereisonesolutiontosolvetheproblem. D.Thisisacrimeinwhichyourprivateinformationisstolenbysomeoneandisusedinallillegalway. E.Theywakeupfromtheircarefreeattitudeonlywhentheybecomeavictimandsufferthedamagescausedbythecrime. F.Thereisnocureforidentitytheftexceptprevention. G.Theymayborrowmoneyfromthebankinyourname.
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