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如图所示，长为l的细线吊着一个小球，静止时处于P点，细线竖直第一次用一个水平恒力F1拉小球，使小球运动到Q点时速度刚好为零，此时细线与竖直方向的夹角为θ＝60°；第二次用一个水平力缓慢拉小球到Q点此...
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高三下学期物理《》真题及答案
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如图所示在水平方向的匀强电场中用长为L.不可伸长的绝缘细线拴住一质量为m带电荷量为q的小球1线的上端
一长为L.的细线上端固定下端拴一质量为m带电荷量为q的小球处于如图15所示的水平向右的匀强电场中开始
一长为L.的细线上端固定下端拴一质量为m带电荷量为q的小球处于如图所示的水平向右的匀强电场中开始时将
一长为L.的细线上端固定下端拴一质量为m带电荷量为q的小球处于如图所示的水平向右的匀强电场中开始时将
如图所示轻质细线悬挂一个小球将小球拉至A点使细线处于拉直状态由静止开始释放小球不计阻力小球摆到与A等
如图所示在竖直平面内用轻质细线悬挂一个小球将小球拉至
点，使细线处于拉直状态，由静止开始释放小球，不 计摩擦，小球可在A.
两点间来回摆动.当小球摆到B.点时，细线恰好断开，则小球将 A.在B.点保持静止B.沿BE方向运动
沿BC方向运动
沿BD方向运动
一长为L.的细线上端固定下端拴一质量为m带电荷量为q的小球处于如图所示的水平向右的匀强电场中开始时将
如图所示在竖直平面内用轻质细线悬挂一个小球将小球拉至
点，使细线处于拉直状态，由静止开始释放小球，不计摩擦，小球可在A.
两点间来回摆动，当小球摆到B.点时，细线恰好断开，则小球将：A.在B.点保持静止B.沿BE方向运动
沿BC方向运动
沿BD方向运动
如图所示长为l的绝缘细线一端悬于O.点另一端系一质量为m带电荷+q的小球小球静止时处于O.´点现将此
如图所示一根长为L的细线上端固定下端拴一质量为m的带电小球将它置于一匀强电场中电场强度大小为E方向是
12分如图所示一质量为m带正电的小球用长为L.的绝缘细线悬挂于O.点处于一水平方向的匀强电场中静止时
如图所示长度为l的细线一端固定于O.点另一端系一质量为m的带电小球整个装置置于水平向右的匀强电场电场
如图所示一长为L.的丝线上端固定下端拴一质量为m的带电小球将它置于一水平向右的匀强电场E.中当细线偏
如图所示在场强为E.=104N/C的水平匀强电场中有一根长为l=15cm的细线一端固定在O点另一端系
如图所示在一根不可伸长的细线上系一个质量为m的小球当把小球拉到使细线与水平面成θ=30°角时轻轻释放
如图所示在竖直平面内用轻质细线悬挂一个小球将小球拉至
点，使细线处于拉直状态，由静止开始释放小球，不 计摩擦，小球可在A.
两点间来回摆动.当小球摆到B.点时，细线恰好断开，则小球将 A.沿BE方向运动B.沿BD方向运动
沿BC方向运动
在B.点保持静止
如图所示在竖直平面内用轻质细线悬挂一个小球将小球拉至
点，使细线处于拉直状态，由静止开始释放小球，不 计摩擦，小球可在A.
两点间来回摆动.当小球摆到B.点时，细线恰好断开，则小球将（ ） A.在B.点保持静止B.沿BE方向运动
沿BC方向运动
沿BD方向运动
一长为L.的细线上端固定下端拴一质量为m带电荷量为q的小球处于如图所示的水平向右的匀强电场中开始时将
如图所示在竖直平面内用轻质细线悬挂一个小球将小球拉至
点，使细线处于拉直状态，由静止开始释放小球，不计摩擦，小球可在A.
两点间来回摆动.小球摆到B.点时，细线恰好断开，则小球将 A.在B.点保持静止B.沿BE方向运动
沿BC方向运动
沿BD方向运动
如图所示在水平方向的匀强电场中用长为L.不可伸长的绝缘细线拴住一质量为m带电荷量为q的小球1线的上端
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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. LastFridayourschoolorganizedustoafirestationwhatwehadexpectedseveraldays.Whenwegottherethefire﹣fighterswelcomedusbutledusintoanexhibitionhall.Thereoneofthemdeliversalectureonfirecontroltous.Afterthattheyshowedushowtooperatethefireextinguisherandevengaveourchancestopracticeusingit.NowIdaresayIcanuseitskillful! Onourwayhomewecouldn'thelptotalkingaboutwhatwehadexperienced.Wefeltveryhappyandexcitingbecausewehadgainedsuchmuchknowledgeaboutfirecontrolandknownwhattodoinanemergency. Doyouhaveanythinginterestingtotellme?I'mlookingforwardtoyouremail.
Moreandmorepeoplekeeppetsnowadays.Thedogandthecatarelovablebeautifulandintelligentanimals.Adogandacatcanteachusalotabouthumannature.Morethanoneownerofadoghassaidthattheanimalunderstandseverythinghesaystoit.Soamotherorfatherwhohasevercaredforpetsislikelytobemorepatientandunderstandingwiththeirchildrenaswellandespeciallytoavoidmakingnegativeorruderemarksinthepresenceofchildrennomatterhowyoung. Acatcanteachusavaluablelessonabouthowtobecontentedhowtocalmdownateasehowtositwhereasadogcanteachuslessonsofloyaltyanddevotion.Sothere'splentytobesaidinfavorofkeepingpets.ButwithallthatinmindIstillsaylet'sstopkeepingpets.TobepracticalIamsuggestingthatifwedonotnowhaveapetweshouldnotgetonesecondifwenowhaveapetweletitbeourlastone.Icouldneversaythatpetsarebad.I'msayinglet'sgiveupthisgoodthing﹣theownershipofapet. Thepurchasethehealthcarethefeelingandhousingandtrainingofapet﹣andIchieflymeanthelargerlong﹣livedpets﹣﹣﹣costtimeandmoney.Thecaringofapetcostsfromadollaraweektoadollarormoreaday.Iwouldnotforamomentdenyitisworththat.Butthefactoutsidethewallsofourhomekeepsbreakinginonourawareness.Thoughwedonotseethepoverty﹣strickenpeopleofIndiaandAfricaandSouthAmericawecanneverquiteforgetthattheyarethere.Nowandthentheirfacesareshowninthenewsorinthebeggingadsofrelieforganization.Probablywesendadonationwheneverwecan. Themoneyandthetimewespendonpetsissimplynotourown.Doingwithoutpetsandthensendingthemoneysavedtoarelieforganizationwouldmeansavingalife﹣﹣﹣overtheyearsseveralhumanlives.Togivewhatwewouldspendonacatmightnotfeedachildbutitwouldprobablypayforhismedicalcareorbasiceducation.Thepointneedsnolongerlaboring.Thatisallthatneedstobesaid. 1WhichofthefollowingisTRUEaccordingtothepassage? A.Peopleusuallyspendsomuchmoneyonpetswithoutrewards. B.Peoplehavenomoneytosolvetheproblemofpovertyintheworld. C.Takingcareofpetscanhelpmakeourchildrenandourselveskinder. D.Theauthorcallsonthepeopletostopraisingpetsathomebecauseofdiseases. 2Howaremostpetownersdifferentfromothersaccordingtothepassage? A.Theycanbemoreloyalanddevoted. B.Theytendtobemorepatientandcaring. C.Theyseemtobecontentedandcalm. D.Theyarelikelytobebusyandindependent. 3Whatdoestheunderlinedpartthefactreferto? A.Moreandmorepeopleliketokeepdogsandcats. B.Nobodycaresaboutthepoverty﹣strickenpeople. C.Keepingpetscausesmuchwasteofmoneyandtime. D.Manypeopleoneartharestillsufferingfrompoverty. 4Whatistheauthor'sviewaboutpet﹣keeping? A.Keepingpetscanmakeusunderstandmoreabouthumanandnature. B.Keepingpetsforalongtimemakespeoplefeellackofcommunication. C.Weshouldstopkeepingpetstodonatethemoneytothepoorpeople. D.Wemustkeepallkindsofpetstoprotectmanandenvironmentproperly.
易拉罐拉环拉断后就很难打开若将A4纸对折几次后用纸的硬尖角摩擦原拉环边缘如图所示一会儿罐口就会自动冲开并看到一团“白汽”．出现这团“白汽”是因为水蒸气发生了选填“液化”或“汽化”现象．摩擦后罐口会自动冲开是因为罐内气体对罐口拉片压力增大使罐口打开．
随着物联网技术的发展智能家居已悄然走向前台．下图为智能家居中的安防系统和饮用水净化系统请回答问题 1安防系统 门禁系统智能家居的门禁系统倾向于利用生物识别如指纹锁等．不同的人指纹不同指纹是人的一种性状由决定．烟雾报警图1是烟雾报警器的简化原理图其中电源电压恒定不变R0为定值电阻R为光敏电阻当有烟雾遮挡射向光敏电阻的激光时电路中的电流减小到某一数值时报警器开始报警．则光敏电阻的阻值随光照强度的减弱而选填“增大”“减小”或“不变”此时电压表示数较未报警前选填 “增大”“减小”或“不变”． 2饮用水净化系统 如图2所示在饮用水净化系统中设备①②③的作用分别是．
我国自主生产的某型号水陆两栖坦克如图所示．它的总质量为2.2×104kg停在水平地面上时履带着地的总面积为4m2．海水的密度ρ＝1.03×103kg/m3求 1该坦克停在水平地面上时对地面的压强 2该坦克在海面上航行时受到海水的浮力 3若该坦克用2.8×103N的推进力在水平地面上以15m/s的速度匀速行驶10min推进力所做的功和功率．
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如图所示在厚玻璃筒内放一小团浸有少量乙醚的棉花快速压下活塞观察到棉花燃烧．下列说法正确的是
桥式起重机在工业生产上有广泛应用．如图是某桥式起重机的示意图水平横梁MN架在轨道A和B上电动机D可沿横梁左右移动．横梁电动机挂钩滑轮钢索导线的质量以及滑轮上的摩擦均不计． 1电动机通过滑轮组将质量为600千克的零件以0.4米/秒的速度匀速吊高4米．求电动机对零件做的功为多少焦电动机的功率至少为多少瓦g取10牛/千克 2已知横梁长度为L零件质量为m电动机吊着零件从M点出发并开始计时以水平速度v匀速运动到N点横梁对轨道A的压力F与时间t的关系式为F＝．
在探究“凸透镜成像规律”的实验中． 1调整实验器材使烛焰和光屏的中心位于凸透镜的主光轴上如图所示这样调节的目的是 2实验过程中如果用不透明的硬纸板挡住凸透镜的上半部分则光屏上的像填字母． A．只出现烛焰像的上半部分B．只出现烛焰像的下半部分 C．出现烛焰完整的像但像更小了D．像仍然是完整的且大小不变只是变暗了 3实验过程中燃烧的蜡烛在不断缩短导致光屏上的像向上移动为了使烛焰的像能成在光屏中央在不更换实验器材的情况下请写出一种可行的方法
Mostofushavequitegoodmemoriesbutourmemoriesarelimited.Forexamplewecannotremembereveryonewehaveevermetorwhatwedidoneverysingledayofourlives.Howevertherearesomepeoplewhodohaveprodigiousmemories.Thesepeoplehavearareconditionknownassavantsyndrome学者症候群.Savantssufferfromadevelopmentaldisorderbuttheyalsoexhibitgreattalentsthatcontrast显出差异sharplywiththeirphysicalandmentaldisabilities. KimPeek1951﹣2009wasasavantwholivedinSaltLakeCityUtahintheUnitedStates.Hewasbornwithdamagetopartsofhisbrainbutitseemedthatotherpartsofhisbrainparticularlythoserelatingtomemorybecameover﹣developed. Peek'suniqueabilitiesappearedataveryearlyage.Whenhewasjust20monthsoldhecouldalreadyremembereverybookthatwasreadtohim.Peekcouldreadtwopagesofabookatthesametime﹣﹣﹣onepagewiththerighteyeandonewiththeleft﹣﹣﹣inlessthan10secondsandremembereverythingheread.BythetimehediedPeekhadmemorizedmorethan9000books.Hecouldrememberallthenamesandnumbersinavarietyoftelephonebooks.Hecouldrememberthousandsoffactsabouthistoryliteraturegeographyandsports. Dr.DavidTreffertanexpertonsavantsyndromeoncedescribedPeekasalivingGooglebecauseofhisastonishingabilitytomemorizeandconnectfacts.HoweveratthesametimePeekwasunabletocarryoutsimpletaskssuchasbrushinghishairorgettingdressedandheneededotherstohelphim.In1989themovieRainManwontheOscarforbestPicture.ThemaincharacterinthemovieplayedbyDustinHoffmanwasbasedonKimPeek'slife.Hestartedtoappearontelevisionwherehewouldamazeaudiencesbycorrectlyansweringdifficultquestionsondifferenttopics.Peekbecameworldfamousandheandhisfatherbegantouringwidelytotalkaboutovercomingdisabilities.Heinspiredagreatmanypeoplewithhiswords.Recognizingandrespectingdifferencesinothersandtreatingeveryoneinthewayyouwantthemtotreatyouwillmakeourworldabetterplaceforeveryone.Everyoneisdifferent. 1TheunderlinedwordprodigiousinParagraph1probablymeans. A.happy B.vivid C.amazing D.short 2AccordingtothetextPeek. A.couldtakecareofhimself B.wasbornwithagoodmemory C.wasthestudentofDr.DavidTreffert D.becamebrain﹣damagedat20monthsold 3HowisParagraph3mainlydeveloped? A.Byprovingfacts. B.Byfollowingtimeorder. C.Byanalyzingcauses. D.Bymakingcomparisons. 4Peek'swordssuggestthatweshould. A.respectdifferentcultures B.listentodifferentopinions C.treatdifferentpeopledifferently D.berespectfulofothers'differences
2018年2月6日现役世界最强大运载火箭“猎鹰重型”从美国佛罗里达州肯尼迪航天中心39A发射台腾空而起拖着熊熊尾焰直入蓝天．这预示着人类探索宇宙更近了一步．火星Mars是太阳系八大行星之一是太阳系由内往外数的第四颗行星属于类地行星直径约为地球的53%火星直径约为月球的两倍地球的一半表面重力约为地球的2/5．火星周围也笼罩着大气层与地球大气层相似．火星大气层的主要成分是二氧化碳其次是氮氩此外还有少量的氧和水蒸气．下列说法科学的是
在科学实验中常用到斜面这一简单机械请回答问题 1利用斜面研究阻力对物体运动的影响如图甲所示．小车从同一斜面的同一高度由静止开始滑下在毛巾木板平板玻璃等不同的表面上前进不同的距离后停止此过程中小车克服阻力做功．假设在毛巾木板平板玻璃表面上小车克服阻力做的功分别为W1W2W3请比较并写出它们的大小关系式． 2利用斜面探究动能大小与哪些因素有关如图乙所示．在这个实验中通过观察比较来判断小球动能的大小．要探究动能大小与物体的运动速度应该如何操作．
IamimpressedbyanincidentthathappenedduringIgnacyPaderewski'sNovember181860﹣June291941career.ThefamousPolishpianistagreedtoplayaconcertorganizedbytwoStanfordUniversitystudentsworkingtheirwaythroughschool.Paderewski'smanagersaidtheywouldhavetoguaranteetheartistafeeof﹩2000.Theboysagreedandeventuallytheconcertwasheld.Thoughthetwostudentpromotersworkedhardtheytookinonly﹩1600.DiscouragedtheytoldPaderewskioftheireffortsandhandedhimthe﹩1600withanotepromisingtopayhimthebalanceof﹩400.Buttheartisttoreupthenoteandgavethembackthe﹩1600.Takeyourexpensesoutofthishesaidgiveyourselveseach10%ofwhat'sleftforyourworkandletmehavetherest. YearslaterPaderewskiwasfacedwithfeedingthepeopleofhiswar﹣ravagedPoland.AmazinglyevenbeforearequestwasmadethousandsoftonsoffoodweresenttoPolandbytheUnitedStates. PaderewskilatertraveledtoParistothankHerbertHooverwhoheadeduptheUSreliefeffort.That'sallrightMr.PaderewskisaidHooverIknewthattheneedwasgreat.AndbesidesthoughyoumaynotrememberitIwasoneoftwocollegestudentswhomyougenerouslyhelpedwhenIwasinneed. Thestoryillustratesalawofsuccessfullivingsoonerorlaterwewillreapwhatwesow.Paderewskireapedaharvestofkindnesshehadsownyearsbefore.Thosewhosowlovewilleventuallyreaplove.Thosewhosowgoodnesswillreapevenmore.Thosewhosowfearandmistrustwillreapanunwantedharvestlater.It'sabasiclawofsuccessfulliving.Andpowerfulenoughtochangealife. 1Thetwostudentsorganizedtheconcertto. A.raisemoneyforthepeopleinneed B.showtheirinterestinmusic C.earnmoneyfortheirstudy D.workfortheirschool 2Thatthetwostudentspromisedtopaytheartisttherestmoneyshowsthatthey. A.kepttheirwords B.wereforcedtodothis C.wantedtogettheartist'ssympathy D.knewtheywouldpaytheartistontime 3WhydidPaderewskigetthousandsoftonsoffood? A.Becauseheoncedonatedfoodtoothers. B.Becausehegaveothershelpwhentheywereinneed. C.Becausehemadearequest. D.Becausehiscountryhadagoodrelationshipwithothers. 4Thepurposeofwritingthepassagemaybeto. A.tellusastorybetweenthetwostudentsandanartist B.showusthattheartistwasagoodperson C.fightagainstthebadpeople D.callonustoshowkindnessandlove
如图所示用10N的力F沿水平方向拉滑轮可使物体A以0.2m/s的速度在水平面上匀速运动．弹簧测力计的示数恒为2N不计滑轮测力计绳子的重力滑轮的转轴光滑．下列说法正确的是
小乐利用长宽和厚度均相同的锌片铁片与铜片完成了以下实验 利用锌片和铜片制作电池 1小乐从课本中得知将一块锌片和一块铜片插入稀硫酸就可以组成一个电池铜片和锌片是电池的两个电极且溶液中部分离子移动的方向和电极上电子移动的方向如图乙所示．此电池的能量转化是若要用电压表测此电池的电压则电压表的负接线柱应与相连选填“铜片”或“锌片” 2小乐从课本中还知道若在水果中插入锌片和铜片可以制得水果电池于是她完成了如下实验 通过上述实验可知水果电池电压大小的影响因素有．
假设你是李华你的英国笔友Chris刚刚转学感到一切都很陌生.他在邮件中向你询问如何尽快融入新环境.请你根据以下信息回信 1.多跟同学交流沟通 2.积极参加学校活动 3.向老师寻求帮助. 注意1.词数100左右 2.可适当增加细节以使行文连贯. DearChris Yours LiHua.
CityCollegeUnionCompany Secretary/Typist TheUnionisastudent﹣runorganizationwithapermanentstaffof20.Typingspeedatleast60wpm. Theabilitytotakeshorthanddictationandaworkingknowledgeoffillingproceduresareessentialrequirements. Thebasicsalaryforthepositionis﹩18500peryear. EnquirestoR.Barbar387﹣5075. EmuAirline Secretary EmuAirlineisnowofferingapart﹣timepositionforasecretary. Thepositionoffersatleast20hours'workaweekwithaviewtofull﹣timeworkinthefuture.Monthlysalaryisabout﹩1400. Phone899﹣3264foranappointment. WordProcessor Operatorfull﹣time Weneedanoperatortoworkinanofficeassociatedwiththebuildingindustry.Onlyexperiencedoperatorsareexpectedtoapply. Startingsalary﹩17950yearly. ApplyinwritingtothePersonnelOfficerHillMorganPtyLtd38GreenHillRd. SewingMachinistWanted JeansIndustry Weareanexpandingclothingcompanylocatedsouthofthecity.Ourproductsincludejeansskirtsshortsandsoon.Wearelookingforsewingmachineoperators. Thefactoryworksa38﹣hourweekover4﹣5days.Wagesforthisare﹩18050peryear.IfyouareinterestedcomeoverandpickupanapplicationformfromRipperJeans23NorthAveBeaudesert. 1Whatdothesefouradvertisementshaveincommon? A.Eachofthemiscommentedbytheirmanager. B.Theyarelocatedinthesouthofthesamecity. C.Theircompaniesareintroducedindetail. D.Theyallwantpeopleintheproperposition. 2TheapplicantsforthepostofasecretaryinCityCollegeUnionCompanyshouldhavethefollowingqualitiesEXCEPT. A.abilityoforganization. B.knowledgeaboutfillingtheform. C.typingskill. D.writingrapidly. 3TheattractivenessofthepostinEmuAirlineis. A.itspromisingfuture. B.itsfreeflying. C.itsgoodsalary. D.itsniceworkingconditions. 4Ifyouwanttobeasewingmachineoperatoryoumaycontactthiscompanyby. A.visit. B.fax. C.phone. D.email.
如图所示的是小兰家的电能表．此时电能表的示数是kW•h．
下列相关的量之间的关系符合如图所示图线的是
如图台秤的托盘上一个装有水的烧杯一个不吸水的木块下面用细线悬挂一个实心铁球木块仍浮在水面上．下列各种说法中正确的是
如图圆柱形盛水容器横截面积为S1．重力为G的柱形金属块横截面积为S2已知S1＞S2金属块用细线悬挂并使之底面恰好与水面齐平．现将金属块缓慢下降浸入水中设水均不溢出且金属块不浸没水的密度为ρ则 1金属块底面在水中深度为h时金属块所受浮力为多少 2金属块相对容器底部下降高度为H时盛水容器底部增大的压强是多少
玻璃板下面垫着一张报纸玻璃板上滴一滴水透过水滴看报纸上的字看到的是字的
在水平桌面上竖直放置一个底面积为S的圆柱形容器内装密度为ρ1的液体．将挂在弹簧测力计下体积为V的金属浸没在该液体中液体未溢出．物体静止时弹簧测力计示数为F撤去弹簧测力计球下沉并静止于容器底部此时液体对容器底的压力为容器底对金属球的支持力的n倍．求 1金属球的密度 2圆柱形容器内液体的质量．
请用笔画线代替导线将图中带拉线开关的电灯正确接入家庭电路中．
小蕾同学的实验小组在探究“电流产生热量的多少与哪些因素有关”时使用了如图甲所示的实验装置烧瓶A内装有一定质量的煤油． 1连接实验电路时同组的小超问小蕾“打开实验室里的水龙头就可以接到水了为什们还要用煤油呢”小蕾对他说“因为煤油的比水的小方便观察温度计示数的变化．” 2在闭合开关前他们应将滑动变阻器的滑片P移到最选填“左”或“右”端． 3小蕾将滑片P移动到某一位置闭合开关10s后断开开关．在这段时间他们观察到温度计的示数逐渐升高．这个实验现象说明电流通过导体产生热量的多少与有关． 4接着小蕾又将滑片P向左移动到某一位置闭合开关10s后断开开关．他们观察到这一次温度计的示数比上一次实验时的示数还要高．两次实验对比他们能得出的结论是电流通过导体产生热量的多少还与有关． 5完成上述实验后同组的小磊想到家中的电热烤火器工作时烤火器热得烫手但连接烤火器的导线却不怎么热．他猜想电流通过导体产生热量的多少可能还与电阻的大小有关．于是他们准备了两个完全相同的烧瓶烧瓶內装有质量相等初温相同的煤油并将两段长度横截面积相同但材料不同的电阻丝浸没在煤油中再用带有规格完全相同的温度计的橡胶塞封住瓶口如图乙所示． ①图乙中两段电阻丝的连接方式是． ②闭合开关后他们观察到A烧瓶中的温度计示数逐渐升高B烧瓶中的温度计示数不变．出现这种现象的原因可能是B烧瓶中的电阻丝． ③他们排除故障闭合开关一段时间后观察到选填“A”或“B”烧瓶内温度计的示数较高．由此可知小磊的猜想是选填“正确”或“错误”的．他们通过分析本次实验现象得出了“在电流大小和通电时间相同时电阻越大电流通过导体产生的热量越多”的结论．
SwedishbusinessmanNileBergqvistisdelighted1hisnewhoteltheworld'sfirstigloo冰屋hotel. 2buildinansmalltownithasbeenattractinglotsofvisitorsbutsoonthefunwillbeover.Intwoweeks'timeBergqvist'sicecreation3benothingmorethanapoolofwater.Wedon'tseeitasabigproblemhesays.Wejustlookforwardto4replaceit. Bergqvistbuilthisfirstiglooin1991foranartexhibition.Itwas5successfulthathedesignedthepresentone6measuresroughly200squaremeters.Sixworkmenspentmorethaneightweekspiling1000tonsofsnowontoa7woodbasewhenthesnowfrozethebasewasremoved. Aftertheirstayallvisitorsreceiveasurvivalcertificaterecordingtheirsuccess.Withnowindowsnowheretohangclothesandtemperatures80°Citmayseemmorelikeasurvivaltest9arelaxinghotelbreak.It'sgreatfunBergqvistexplainsAswellasagoodstartinsurvivaltraining.'' The10popularoftheiglooisbeyonddoubtitisnowattractingtouristsfromallovertheworld.Atleast800peoplehavestayedattheigloothisseasoneventhoughthereareonly10rooms.
Conventionalwisdomisamajorbarriertoinnovation创新thatthreatensthesurvivalofcompanieseverywhere.It'sbasedontheassumptionthatoldideaswillalwaysworksotheyshouldn'tbechallenged.Whilethismaybeavalidassumptioninsituationsthatdon'tchangeit'sunlikelytoholdtrueinachangingsituation.Intoday'srapidchangingglobalenvironmentoldmethodsoftendon'tworkandstubbornlyusingthemcanleadtomajorproblems. Mostpeopleseemtoagreewithconventionalwisdombecauseitgivesoneafalsesenseofsecurity.Ifeveryoneelsebelievesitthenitmustbetrue.Individualswhouseconventionalwisdomarecertainthattheyarerightandbeingrightisgood.Theywanttocontinueusingoldideasratherthantakeriskswithchangesthatmightnotwork.In1977KenOlsenco﹣founderandCEOofDigitalEquipmentCorporationDECstatedThereisnoreasonforanyindividualtohaveacomputerinhishome.DespitebeingadominantleaderinthecomputerindustryDECnolongerexists. Peopleseemtoforgetthatsinceinnovationisachangetherecanbenoinnovationwithoutchange.Unfortunatelyconventionalwisdompreventsleadersfollowersandcompaniesfromchangingandthereforeinnovating.Ifcompaniesdon'tinnovatebuttheircompetitorsdothefutureislikelytobeproblematic.Breakingfromconventionalwisdomhasledtomanyofthemostinnovativecompaniesandproductsinhistoryacrossmanyindustriessoithasapowerfuleffectonbusinesssuccess. TedTurnerfounderofCNNknewlittleifanythingaboutthenewsbusinessbutheknewitwasinconvenienttowatchnewsonlyatthedinnerhouraswascommonbeforeCNN.Turner'ssolutionwastocreateacablechanneldedicatedtonews24hoursaday.Thenewsestablishmentreflectedconventionalwisdomatthetimeandpredictedhisideawouldfailbecausenoonewantedtowatchthenewsallday.Howeveritdoesn'ttakearocketscientisttounderstandthatviewersdon'thavetowatchthenewsalldayfortheCNNtowork.Viewersjusthavetowatchwhentheywanttogetinformation.DuetoconventionalthinkingthecriticsfailedtorecognizetheopportunitythatwascleartoTed.Theyassumedthatonlywhatwasfamiliartothemcouldworkinthefuture. Conventionalwisdompreventscreativityflexibilityandrisk﹣takingsounconventionalleadersenthusiasticallybreakfromit.Tosurvivethriveandmaintaincompetitiveadvantagecompaniesmustbeflexiblewhenreactingtochange. 1DEChasdisappearedprobablybecause. A.theCEOstucktotheconventionalideas B.theleaderslackedthesenseofsecurity C.theconsumersdidn'tlikeitsproducts D.theemployeestookmanyriskswithchanges 2ThefoundingofCNNisusedasanexampletoprove. A.missingopportunitiescouldleadtofailure B.conventionalwisdominfluencesbusinesssuccess C.watchingnewsatthedinnerhourisconvenient D.changingcouldcontributetobusinesssuccess 3Whatdoestheunderlinedpartprobablymean? A.RocketscientistscanensuretheCNNworksproperly. B.It'seasytoknowpeopleneedn'twatchthenewsallthetime C.It'snecessarytounderstandwhenpeoplewatchthenews. D.Mostoftheviewersdon'tliketowatchthenewsatwork. 4Thepassageismainlywrittentotellusthat. A.conventionalwisdomlimitsinnovation B.opportunitiesleadtobusinesssuccess C.oldmethodsarechangingwithtime D.successfulcompaniesneedwiseleaders
一般大型超市出口处都装有报警器一般是由防盗天线检测门检测器构成．使用时只要在商品上贴上具有磁性的软标签即可达到保护商品的目的．正常购买时营业员在结帐后会将具有磁性的软标签消磁如果商品的软标签未经消磁当经过检测通道后检测天线便检测到商品上的标签信号从而转化为电信号发出报警声及时提醒保安人员从而达到防盗目的．根据上述信息可以判断报警器的原理与下列哪个实验相同
Ittakesplentyoftimeforsomeadultstotrytostopchildrenplaying.Theyareusuallypeoplewhothinkofplayasbeingthe1ofworkandthereforeawasteoftime.Forhumansworkisawayofgettingfoodtoeatandlikehumans2mustspendtimedoingthe3things.Regardlessofthischildren4playingandsodootheryounganimals.Itisquite5tokeepbothasmallchildandayoungcat6forhourswithapieceofpaper. Huntingmaybethemostobviousskill7inplaybutitisfarfrombeingtheonlyone.Lambsandgoatkidsplay8althoughasadultstheywillnever9anythingotherthansomegrass.Butfortheseyounganimalstoo10isanimportantpartoflearning.Sheepandgoatsare11hillandmountainanimals.Runningandskippingexerciseyounglegsanddevelopastrongsenseof12thatwillkeepthemsafeonthesteepestrocks. 13animals'playchildren'splayisnotsodifferent.14treesandcatchingfliesarenotthemostobvioustrainingfortheadultworldbuttheflexibility15intheseactivitiesissimilartothatrequiredofabusdriverorbusinessman. Whatweknowaboutanimalsshowsusthatplayingisaverygoodwayof16somaybeoneofthebestwaysfor17tolearnisalsobyplaying.Childrenfindplayingisfunbut18noticethattheyarealsolearningatthesametime.Mostpeoplecontinuetoplaygameslongaftertheyhavebecome19andperhapsthatisbecausewerelysomuchonour20tolearn. 1A.reward B.basis C.nature D.opposite 2A.children B.animals C.parents D.cats 3A.dull B.ordinary C.same D.chief 4A.enjoy B.regret C.delay D.ignore 5A.necessary B.possible C.reasonable D.difficult 6A.annoyed B.alarmed C.amused D.amazed 7A.practiced B.kept C.tested D.required 8A.clumsily B.endlessly C.crazily D.aggressively 9A.catch B.plant C.learn D.hunt 10A.play B.work C.jump D.walk 11A.naturally B.initially C.strangely D.equally 12A.direction B.balance C.distance D.space 13A.Basedon B.Inspiredby C.Comparedwith D.Developedform 14A.Cutting B.Growing C.Watering D.Climbing 15A.reduced B.needed C.damaged D.allowed 16A.growing B.exercising C.improving D.learning 17A.humans B.creatures C.adults D.students 18A.generally B.possibility C.hardly D.truly 19A.strong B.wise C.athletic D.mature 20A.flexibility B.liberty C.curiosity D.responsibility
IwastenwhenIfirstsatwithmygrandmotherbehindthecashier收银台inhergeneralstore.1Iquicklylearnedtheimportanceoftreatingcustomerspolitelyandsayingthnakyou. AtfirstIwaspaidincandy.2Iworkedeverydayafterschoolandduringthesummerandonweekendsandholidaysfrom8a.m.to7p.m.Myfatherhelpedmesetupabannkaccount.3 BythetimeIwas12MygrandmotherthoughtIhaddonesuchagoodjobthatthepromotedmetosellingcosmetics化妆品.Idevelopedtheabilitytolookcustomersdirectlyintheeye.EventhoughIwasjustakidwomenwouldaskmesuchthingsasWhatcolordoyouthinkIshouldwear?Itookarealinterestintheirquestionsandwasabletotranslatewhattheywantedintomakeup化妆ideas.4 Thejobtaughtmeavaluablelessontobeasuccessfulsalespersonyoudidn'tneedtobeaRocketscientist﹣youneededtobeagreatlistener.5expecttheyareNOlongerwomenpurchasingcosmeticsfrommeinsteadtheyarekidswhotellmewhichtoystheywouldliketoseedesignedanddeveloped. A.LaterIreceived50centsanhour. B.Beforelongsheletmesirtherebymyself. C.Iendedmysellingarecordamountofcosmetics. D.TodayIstillcarrythatlessonwithmeIlistentocustomers. E.Mygrandma'strusttaughtmehowtohandleresponsibility. F.SoonIfoundmyselflookingmorebeautifulthaneverbefore. G.WatchingmymoneygrowwasmorerewardingthananythingIcouldhavebought.
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