Questions1to4arebasedonthefollowingpassage.　　Byanymeasure,computersareamongthemostinfluentialandpowerfultoolsofthemodernage.Theyrepresentthehigh-techrevolutionthathastransformedthewaysinwhichhumanbeingsinteractwitheachotherandwiththeworldatlarge.Seemingly,computersaretheverydefinitionofthemodernera.Althoughmoderncomputershaveonlybeenapartofoureverydayworldforafewdecades,adiscoverymadejustoveracenturyagofoundthattheconceptbehindthemisfarolderthananyonecouldhaveimagined.Infact,accordingtotheexpelswhohavestudiedanancientGreekshipwreck,oneparticular“computer”datesbackmorethan2,000years.　　Madeofmetal,thismechanismisapproximatelythesizeofashoebox.Itwasfoundinl901bydiversworkingofftheisleofAntikythera.Uncertainofthemechanism’sfunction,thediversnameditaftertheislandnearwhichitwasfound.Atthetime,theAntikytherawasinterribleshapefrombeingunderwaterforsolong.Itspieceshadmergedintoabrokenmassandallexpertscoulddeducewasthatithadsomethingtodowithastronomy.Recently,thankstoacombinationofadvancedimagingmethodsandx-raycomputertomography,scientistshavebeenabletore-createthepossibledesignoftheapparatus.　　TheAntikytheramechanismoncehadatleast30bronzegearswithasmanyas225hand-cutteeth.Scientistsbelieveitwasdesignedtocomputeeclipsesofthesunandmoonanumberofyearsintothefuture,aswellasshowthemotionsoftheplanets.Whileexpertsarestilluncertainastowhythedevicewasmade,thereisnodoubtthatitstechnologywasatleastl,000yearsaheadofitstime.

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