[自整]英语六级新题型——选词填空

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1、Anovelwayofmakingcomputermemories,usingbacteriaFORhalfacentury,the(1)ofprogressinthecomputerindustryhasbeentodomorewithless.Moore'slawfamouslyobservesthatthenumberoftransistorswhichcanbecrammedintoagivenspace(2)every18months.Theamountofdatathatcanbes

2、toredhasgrownatasimilarrate.Yetas(3)getsmaller,makingthemgetsharderandmoreexpensive.OnMay10thPaulOtellini,thebossofIntel,abigAmericanchipmaker,putthepriceofanewchipfactoryataround$10billion.HappilyforthosethatlackIntel'sresources,theremaybeacheaperop

3、tion一namelytomimicMotherNature,whohasbeenbuildingtiny(4),intheformoflivingcellsandtheircomponents,forbillionsofyears,andhasthusgotrathergoodatit・ApaperpublishedinSmall,ananotechnologyjournal,setsoutthelatestexampleofthe(5)•Init,agroupofresearchersled

4、bySarahStanilandattheUniversityofLeeds,inBritain,describeusingnaturallyoccumngproteinstomakearraysoftinymagnets,similartothoseemployedtostoreinformationindiskdrives.Theresearcherstooktheir(6)fromMagnetospirillummagneticum,abacteriumthatissensitivetot

5、heEarth'smagneticfieldthankstothepresencewithinitscellsofflecksofmagnetite,aformofironoxide・Previousworkhasisolatedtheproteinthatmakestheseminiaturecompasses・Usinggeneticengineering,theteammanagedtopersuadeadifferentbacterium—Escherichiacoli,aubiquit

6、ouscritterthatisaworkhorseofbiotechnology一to(7)thisproteininbulk・Next,theyimprintedablockofgoldwithamicroscopicchessboardpatternofchemicals・Halfthesquarescontainedanchoringpointsfortheprotein.Theotherhalfwereleftuntreatedascontrols.Theythendippedtheg

7、oldintoasolutioncontainingtheprotein,allowingittobindtothetreatedsquares,anddunkedthewholelotintoaheated(8)ofironsalts・Afterthat,theyexaminedtheresultswithanelectronmicroscope.Sureenough,groupsofmagnetitegrainshadmaterialisedonthetreatedsquares,sheph

8、erdedintoplacebythebacterialprotein・Inprinciple,eachofthesemagneticdomainscouldstoretheoneorthezeroofabitofinfomiation,accordingtohowitwaspolarised・Gettingfromtheretoarealcomputermemorywouldbealongroad.Forastart,thegrainsofmagnetitearenotstrongenough