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英语六级考试选词填空巩固训练2017年英语六级考试选词填空巩固训练Nothingdriessoonerthanatear.以下是小编为大家搜索整理的2017年英语六级考试选词填空巩固训练，希望能给大家带来帮助!更多精彩内容请及时关注我们应届毕业生考试网!Anovelwayofmakingcomputermemories，usingbacteriaFORhalfacentury，the(1)__________ofprogressinthecomputerindustryhasbeentodomorewithless.Moore'slawfamouslyobservesthatthenumberoftransistorswhichcanbecrammedintoagivenspace(2)__________every18months.Theamountofdatathatcanbestoredhasgrownatasimilarrate.Yetas(3)__________getsmaller，makingthemgetsharderandmoreexpensive.OnMay10thPaulOtellini，thebossofIntel，abigAmericanchipmaker，putthepriceofanewchipfactoryataround$10billion.HappilyforthosethatlackIntel'sresources，theremaybeacheaperoption—namelytomimicMotherNature，whohasbeenbuildingtiny(4)__________，intheformoflivingcellsandtheircomponents，forbillionsofyears，andhasthusgotrathergoodatit.ApaperpublishedinSmall，ananotechnologyjournal，setsoutthelatestexampleofthe(5)__________.Init，agroupofresearchersledbySarahStanilandattheUniversityofLeeds，inBritain，describeusingnaturallyoccurringproteinstomakearraysoftinymagnets，similartothoseemployedtostoreinformationindiskdrives.Theresearcherstooktheir(6)__________fromMagnetospirillummagneticum，abacteriumthatissensitivetotheEarth'smagneticfieldthankstothepresencewithinitscellsofflecksofmagnetite，aformofironoxide.Previousworkhasisolatedtheproteinthatmakestheseminiaturecompasses.Usinggeneticengineering，theteammanagedtopersuadeadifferentbacterium—Escherichiacoli，aubiquitouscritterthatisaworkhorseofbiotechnology—to(7)__________thisproteininbulk.Next，theyimprintedablockofgoldwithamicroscopicchessboardpatternofchemicals.Halfthesquarescontainedanchoringpointsfortheprotein.Theotherhalfwereleftuntreatedascontrols.Theythendippedthegoldintoasolutioncontainingtheprotein，allowingittobindtothetreatedsquares，anddunkedthewholelotintoaheated(8)__________ofironsalts.Afterthat，theyexaminedtheresultswithanelectronmicroscope.Sureenough，groupsofmagnetitegrainshadmaterialisedonthetreatedsquares，shepherdedintoplacebythebacteria
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