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PAGEPAGE\*MERGEFORMAT10历年高考试题分项解析之专题七选五1【2016·全国新课标I】根据短文内容，从短文后的选项中选出能填入空白处的最佳选项，选项中有两项为多余选项。Secretcodes(密码)keepmessagesprivate。Banks,companies,andgovernmentagenciesusesecretcodesindoingbusiness,especiallywheninformationissentbycomputer.Peoplehaveusedsecretcodesforthousandsofyears.71Codebreakingneverlags(落后)farbehindcodemaking.Thescienceofcreatingandreadingcodedmessagesiscalledcryptography.Therearethreemaintypesofcryptography.72Forexample,thefirstlettersof“Myelephanteatstoomanyeels”Spelloutthehiddenmessage“Meetme.”73Youmightrepresenteachletterwithanumber,Forexample,Let’snumberthelettersofthealphabet,inorder,from1to26.Ifwesubstituteanumberforeachletter,themessage“Meetme”wouldread“13520135.”Acodeusessymbolstoreplacewords,phrases,orsentences.Toreadthemessageofarealcode,youmusthaveacodebook.74Forexample“bridge“mightstandfor“meet”and“out”mightstandfor“me.”Themessage“bridgeout”wouldactuallymean“Meetme.”75However,itisalsohardtokeepacodebooksecretforlong.Socodesmustbechangedfrequently.Itisveryhardtobreakacodewithoutthecodebook.B.Inanylanguage,somelettersareusedmorethanothers.C.Onlypeoplewhoknowthekeywordcanreadthemessage.D.Aslongastherehavebeencodes,peoplehavetriedtobreakthem.E.Youcanhideamessagebyhavingthefirstlettersofeachwordspellitout.F.Withacodebook,youmightwritedownwordsthatwouldstandforotherwords.G.Anotherwaytohideamessageistousesymbolstostandforspecificlettersofthealphabet.2【2016·全国新课标II】根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。Agardenthat’sjustrightforyouHaveyouevervisitedagardenthatseemedjustrightforyou,wheretheatmosphereofthegardenappearedtototalmorethanthesum(总和)ofitsparts?71.Butitdoesn’thappenbyaccident.Itstartswithlookinginsideyourselfandunderstandingwhoyouarewithrespecttothenaturalworldandhowyouapproachthegardeningprocess.●___72Somepeoplemaythinkthatagardenisnomorethanplants,flowers,patternsandmassesofcolor.Othersareconcernedaboutusinggardeningmethodsthatrequirelesswaterandfewerfertilizers(肥料).73.However,thereareanumberofotherre
