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1、厦门一中2015—2016高二上英语半期考第二部分阅读理解（共两节，满分40分）第一节（共15小题，每小题2分，满分30分）阅读下列短文，从每题所给的四个选项（A、B、c和D）中选出最佳选项。AIt’shappenedtoeveryone.Yourunuptosomeone,thinkingit’syourfriend,onlytorealizethatthepersonisastranger.Butthere’ssomethingaboutthecurveoftheirnoseortheshapeoftheireyesthatlooksstrangelyfam
2、iliar.It’sasifyourfriendhadatwin.TheGermansinventedawordforthisphenomenon,“doppelganger”.Literally,itmeans“doublewalker”,andit’scometomeananyonewholooksverysimilartoanotherperson.Doppelgangerspopupinliteratureandmovies,andevenincelebrityculture.TherearecountlessWebpagesabouthowcelebr
3、itiessuchasUSactressZooeyDeschanelandsingerKatyPerrylookalike.Butcanyoureallyfindapersonwholooksthesameasyou?That’sanongoingdebateinthescientificcommunity.Afterall,humanshavealimitednumberofgenesthatcontrolhowourfacesandbodieslook.“Thereisonlysomuchgeneticdiversitytogoaround,”theUS’C
4、ornellUniversityprofessorMichaelSheehantoldLiveScience.Hecomparedgenestocardsinadeck.Ifthedeckgetsshuffledenoughtimes,somecardswillappearagainandagain.ButforensicscientistDanielePodinifromGeorgeWashingtonUniversity,USisnotconvincedtruedoppelgangersexist.Nothingisimpossible,Podiniadmi
5、ts,buthetoldthewebsiteScienceLinethatmostdoppelgangersaretheresultofperception,thewayeachindividualseestheworld.Weallseefacesdifferently.Youmightseetwopeopleasdoppelgangers,butforsomeoneelse,smalldifferencesbetweenthetwofacesmightbemuchmoreobvious.Eachofushasadifferentabilitytorememb
6、erfaceranddetails.There’sevenasmallgroupofpeoplewhocannottellbetweenfacesatall.Theysufferfromprosopagnosia,or“faceblindness”.Theycannotevenrecognizethefaceoftheirownparentsorfriends.Forthepeoplewhoareverysensitivetodifferencesbetweenfaces,thedifferencescanseemnever-ending.Asinglestud
7、yfound4,000piecesofDNAthatshapeourfaces,andmorehaveyettobediscovered.Yourlifestylechoicescanalsochangeyourlooks.Thosechoicescanbeassimpleasahaircut,orasseriousasbadeatinghabits.Evenidenticaltwinscanstarttolookdifferent,dependingonhowtheylivetheirlives.Inotherwords,ourdoppelgangermayb
8、esomewherein
