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1、2013年12月英语六级考试阅读新型题型之选词填空习题练习题一：SectionADirections:Inthissection,thereisapassagewithtenblanks.Youarerequiredtoselectonewordforeachblankfromalistofchoicesgiveninawordbankfollowingthepassage.Readthepassagethroughcarefullybeforemakingyourchoices.Eachchoiceinth
2、ebankisidentifiedbyaletter.PleasemarkthecorrespondingletterforeachitemonAnswerSheet2withasinglelinethroughthecentre.Youmaynotuseanyofthewordsinthebankmorethanonce.Anovelwayofmakingcomputermemories,usingbacteriaFORhalfacentury,the(1)ofprogressinthecomputerin
3、dustryhasbeentodomorewithless.Moore'slawfamouslyobservesthatthenumberoftransistorswhichcanbecrammedintoagivenspace(2)every18months.Theamountofdatathatcanbestoredhasgrownatasimilarrate.Yetas(3)getsmaller,makingthemgetsharderandmoreexpensive.OnMay10thPaulOtel
4、lini,thebossofIntel,abigAmericanchipmaker,putthepriceofanewchipfactoryataround$10billion.HappilyforthosethatlackIntel'sresources,theremaybeacheaperoption—namelytomimicMotherNature,whohasbeenbuildingtiny(4),intheformoflivingcellsandtheircomponents,forbillion
5、sofyears,andhasthusgotrathergoodatit.ApaperpublishedinSmall,ananotechnologyjournal,setsoutthelatestexampleofthe(5).Init,agroupofresearchersledbySarahStanilandattheUniversityofLeeds,inBritain,describeusingnaturallyoccurringproteinstomakearraysoftinymagnets,s
6、imilartothoseemployedtostoreinformationindiskdrives.Theresearcherstooktheir(6)fromMagnetospirillummagneticum,abacteriumthatissensitivetotheEarth'smagneticfieldthankstothepresencewithinitscellsofflecksofmagnetite,aformofironoxide.Previousworkhasisolatedthepr
7、oteinthatmakestheseminiaturecompasses.Usinggeneticengineering,theteammanagedtopersuadeadifferentbacterium—Escherichiacoli,aubiquitouscritterthatisaworkhorseofbiotechnology—to(7)thisproteininbulk.Next,theyimprintedablockofgoldwithamicroscopicchessboardpatter
8、nofchemicals.Halfthesquarescontainedanchoringpointsfortheprotein.Theotherhalfwereleftuntreatedascontrols.Theythendippedthegoldintoasolutioncontainingtheprotein,allowingittobindtothetreatedsquares,anddu
