英语六级新题型选词填空练习题及答案.docx

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1、英语六级新题型选词填空练习题及答案Anovelwayofmakingcomputermemories， usingbacteria　FORhalfacentury， the （1） __________ofprogressinthecomputerindustryhasbeentodomorewithless.Moore'slawfamouslyobservesthatthenumberoftransistorswhichcanbecrammedintoagivenspace （2）__________every18months. Thea

2、mountofdatathatcanbestoredhasgrownatasimilarrate. Yetas （3）__________getsmaller， makingthemgetsharderandmoreexpensive. OnMay10thPaulOtellini， thebossofIntel， abigAmericanchipmaker， putthepriceofanewchipfactoryataround$10billion. HappilyforthosethatlackIntel'sresources， the

3、remaybeacheaperoption—namelytomimicMotherNature， whohasbeenbuildingtiny （4）__________， intheformoflivingcellsandtheircomponents， forbillionsofyears， andhasthusgotrathergoodatit. ApaperpublishedinSmall， ananotechnologyjournal ， setsoutthelatestexampleofthe （5）__________. In

4、it， agroupofresearchersledbySarahStanilandattheUniversityofLeeds， inBritain， describeusingnaturallyoccurringproteinstomakearraysoftinymagnets，similartothoseemployedtostoreinformationindiskdrives.Theresearcherstooktheir （6）__________fromMagnetospirillummagneticum， abacteriu

5、mthatissensitivetotheEarth'smagneticfieldthankstothepresencewithinitscellsofflecksofmagnetite， aformofironoxide. Previousworkhasisolatedtheproteinthatmakestheseminiaturecompasses.Usinggeneticengineering， theteammanagedtopersuadeadifferentbacterium—Escherichiacoli， aubiquit

6、ouscritterthatisaworkhorseofbiotechnology—to （7）__________thisproteininbulk. Next， theyimprintedablockofgoldwithamicroscopicchessboardpatternofchemicals. Halfthesquarescontainedanchoringpointsfortheprotein. Theotherhalfwereleftuntreatedascontrols. Theythendippedthegoldinto

7、asolutioncontainingtheprotein， allowingittobindtothetreatedsquares， anddunkedthewholelotintoaheated （8）__________ofironsalts. Afterthat， theyexaminedtheresultswithanelectronmicroscope. Sureenough， groupsofmagnetitegrainshadmaterialisedonthetreatedsquares， shepherdedintopla

8、cebythebacterialprotein. Inprinciple， eachofthesemagneticdomainscouldstoretheoneorthezero