626华南理工大学2016年攻读硕士学位研究生入学考试试卷（试卷上做答无效，请在答题纸上做答，试后本卷必须与答题纸一同交回）科目名称：英语综合水平测试适用专业：英语语言文学，外国语言学及应用语言学共页第1页Part1ReadingComprehension(60marks,2markseach)Directions:ReadthefollowingpassagesandmakeONEchoicethatbestcompleteoranswereachofthestatementsorquestionsafterthepassages.Passage1Fallisstaggeringin,rightonschedule,withitsbaggageofchillynights,spectacular,heart-stoppinglybeautifulleaves.PeoplewilltravelupanddowntheEastCoastjusttostareatit–awholeseasonofleaves.Wheredothecolorscomefrom?Sunlightrulesmostlivingthingswithitsgoldenedicts.Whenthedaysbegintoshorten,atreereconsidersitsleaves.Allsummeritfeedsthemsotheycanprocesssunlight,butinthedogdaysofsummerthetreebeginspullingnutrientsbackintoitstrunkandroots,reducesandgraduallychokesoffitsleaves.Adrylayerofcellsformsattheleaves’slenderstems,thenscarsover.Undernourished,theleavesstopproducingthepigmentchlorophyll,andphotosynthesisceases.Animalscanmigrate,hibernate,orstorefoodtoprepareforwinter.Butwherecanatreego?Itsurvivesbydroppingitsleaves,andbytheendofautumnonlyafewfragilethreadsoffluid-carryingxylemholdleavestotheirstems.Aturningleafstayspartlygreenatfirst,thenrevealsspotsofyellowandredasthechlorophyllgraduallybreaksdown.Darkgreenseemstostaylongestintheveins.Duringthesummer,chlorophylldissolvesintheheatandlight,butitisalsobeingsteadilyreplaced.Inthefall,ontheotherhand,nonewpigmentisproduced,andsowenoticetheothercolorsthatwerealwaysthere,rightintheleaf,althoughchlorophyll’sshockinggreenhidthemfromview.Withtheircamouflagegone,weseethesecolorsforthefirsttimeallyear,buttheywerealwaysthere,hiddenlikeavividsecretbeneaththehotglowinggreensofsummer.Anoddfeatureofthecolorsisthattheydon’tseemtohaveanyspecialpurpose.Animalsandflowerscolorforareason–adaptationtotheirenvironment–butthereisnoadaptivereasonforleavestocolorsobeautifullyinthefallanymorethanthereisfortheskyoroceantobeblue.It’sjustoneofthehaphazardmarvelstheplanetpresents...
