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1、大學(xué)英語(yǔ)A4一、閱讀理解1、Takeanylongpieceofpaper.Nowglue（粘）theendsofthepapertogether.Youhavemadearing. Takeasecondlongpieceofpaper.Twistthepaperonceandgluetheendstogether.NowyouhavemadeaMobiusband（帶子）.Forpeoplestudyingmaths,thisbandisuncommon. Thisstrangebandwasfirstmadeinthe1800sbyaGermanmanname
2、dAugust.Mobius.Mr.Mobiusstudiedmaths.Hewantedtofindawaytoshowhowthisbandworkswithmaths.Understanditornot,thisbandhasonlyonesurface.Youcanfindthisoutforyourself. Ifyoudrawalineonthesurfaceofthepaperbeforeyoutwistandglueit,thelineisonlyononesideofthepaper.Thepaperhastwosurfaces.However,if
3、youdrawalineafteryoumaketheMobiusband,youcanfollowthelinearoundallsidesofthepaper.Inotherwords,theMobiusbandmusthaveonlyonesurface.Itisalsoveryinterestingtoseewhathappenswhenyoucuttheband.IfyoucuttheMobiusbandinhalfoncedownthelineyoudrew,youdonotgettwoMobiusbands.Instead,afteryoucuttheba
4、nd,itturnsintoonelargetwistedring.Then,ifyoucutthisringinhalfalongthemiddleofthebandagain,yougettwoconnected（相連的）Mobiusbands.(1)、WhatisaMobiusband?A：Alongpieceofpaper.B：Apaperringforpeopletowear.C：Ametalringformusic.D：Aninterestingtwistedring.答案：D(2)、WhydidAugustMobiusmakethisring?A：Tohe
5、lpstudyamathsproblem.B：Toshowit'sthesameasothers.C：Toshowtheonlysurfaceofanyband.D：Tofindouthowmanysidesithas.答案：A(3)、Howcanyouchangethetwosurfacesofalongpieceofpaperintoonesurface?A：Gluetheendsofthelongpieceofpaper.B：Cutthetwosurfacesofthepaperintoone.C：Drawalineinthemiddleofthepaper.D：
6、Twistthepaperonceandgluethetwoends.答案：D(4)、WhatdoyougetifyoucuttheMobiusbandalongthemiddle?A：Alongpieceofpaper.B：Twolongpiecesofpaper.C：TwoMobiusbands. D：Onelargetwistedring.答案：D(5)、WhichofthefollowingisNOTtrue?A：YoucanuseanylongpieceofpapertomakeaMobiusband.B：Anylongpieceofpaperhastwosu
7、rfaces.C：TheMobiusbandwasfirstmadeabouttwohundredyearsago.D：YouhavetodrawalineinthemiddleofthelongpieceofpaperbeforemakingaMobiusband.答案：D2、 Zeppelins,thebigfloatingairshipsusedtocarrypassengersanddropbombsuntilthe1930s,haven'tbeenseeninAmericanskiesformorethan70years.No
