小学、初中、高中各种试卷真题知识归纳文案合同PPT等免费下载www.doc985.com专题22科普类说明文阅读理解(2010﹒安徽﹒阅读理解B)Haveyoueverwondered?1.Whydoairplanestakelongertoflywestthaneast?Itcantakefivehourstogowest-eastfromNewYork(NY)toLondonbursevenhourstotraveleast-westfromLondontoNY.Thereasonforthedifferenceisanatmosphericphenomenonknownasthejet(喷射)stream.ThejetstreamisaveryhighaltitudewindwhichalwaysblowsfromthewesttotheeastacrosstheAtlantic.Theplanesmovingataconstantairspeedthusgofasterinthewest-eastdirectionwhentheyaremovingwiththewindthanintheoppositedirection.2.WhatwouldhappenifthegravityonEarthwassuddenlyturnedoff?Supposingwecouldmagicallyturnoffgravity.Wouldbuildingsandotherstructures(建筑物)floataway?WhathappenedwoulddependonhowstronglythethingswereattachedtotheEarth.TheEarthismovingatquiteaspeed,movingatoverathousandmilesperhours.Ifyouturnsomethingaroundyourheadonastring（细绳）,itgoesaroundinacircleuntilyouletgoofthestring.Thenitfliesoffinastraightline.‘Switchingoff’gravitywouldbelikelettinggoofthestring.ThingsnotattachedtotheEarthwouldflyoffinastraightline.Peopleinbuildingswouldsuddenlyshootupwardsatagreatspeeduntiltheyhittheceiling.Mostthingsoutsidewouldflyoffintospace.60.Whatinformationcanwegetfromthefirstpassage?A.ItisjetstreamthataffectshowfastairplanesflyB.PlanesgoslowerwhentheyaremovingwiththewindC.IttakesmoretimetoflyfromNYtoLondonthanfromLondontoNYD.TheyetstreamalwaysblowsfromtheeasttothewestacrosstheAtlantic61.Theword”shoot”underlineinthe2ndpassageprobablymeans“”A.sendforB.movequicklyC.comeoutD.grrowquickly小学、初中、高中各种试卷真题知识归纳文案合同PPT等免费下载www.doc985.com小学、初中、高中各种试卷真题知识归纳文案合同PPT等免费下载www.doc985.com62.Itcanbeinferredthatwithoutgravity.A.buildingsandotherstructureswouldfloatawayB.treesandbuildingswouldnoteasilyflyoffC.somethingaroundyourheadwouldnotflyawayD.everythingoutsidebuildingswouldflyoffintospace63.WherecanwemostprobablyreadinthetextA.InareseachpaperB.InashortstoryC.InatravelmagazineD.Inastudent’sbook【解析】本文是科普说明文，主要介绍了飞机为什么向西面飞比向东面飞花的时间更长的原因是气流的方向．从纽约飞往伦敦要花5个小时，而从伦敦飞往纽约则要花7小时．花费时间不同的原因大气现象，喷射气流是一个高空风，这种喷射气流总是穿过太平洋上空从西往东吹．还介绍了没有了地球引力会发生什么．地球以一种极快的速度移动，一个小时会移动超过1000英里，地球引力消失就会像松开甩动的细绳一样，在建筑里的人们将会突然以一种极快的速度被发射出去，直到撞到天花板．许多外面的东西都将飞进太空．60．A归纳总结题．根据短文第一段"Theplanesmovingataconstantairspeedthusgofasterinthewest-eastdirectionwhentheyaremovingwiththewindthanintheoppositedirection"主要讲述了飞机为什么向西面飞比向东面飞花的时间更长的原因是气流的方向，故选A．61．B词意猜测题．根据第二段"Peopleinbuildingswouldsuddenlyshootupwardsatagreatspeeduntiltheyhittheceiling（="top"surfaceofaroom）．Mostthingsoutsidewouldflyoffintospace．"描述在建筑里的人会突然以一个巨大的速度向上移动直到他们撞上天花板．很多东西会飞到外太空．故选B．62．B推理判断题．根据第三段"Whathappenedwoulddependon（依靠）howstronglythethingswereattached（吸附）totheearth．"描述发生了什么将取决于东西连接到地球上有多结实．再根据后面描述"Thenitfliesoffinastraightline．‘Switchingoff'gravitywouldbelikelettinggoofthestring．ThingsnotattachedtotheEarthwouldflyoffinastraightline"可知，树以及建筑不像其他物品那样容...