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1、LookitupHerearetwoarticlesfromanencyclopediaDaVinci,LeonardoLeonardoDaVinci(1452-1519),wasanItalianpainter,inventor,musician,engineerandscientist.DaVinciwasborninthecountryside.Formanearlyage,heshowedgreatintelligenceandartisticability.Ashegrewolder,helearnedtodomanydifferentthings.Hispaintingsar
2、everyfamous.Andonce,theMonaLisaisperhapsthemostfamouspaintingintheworld.Healsohadmanyinventions,forexample,hisnotebooksincludesomeinterestingdrawingsofflyingmachines.DinosaursDinosaurslivedonEarthformorethan60millionyearsbeforehumanbeings.TheylivedeverywhereonEarth.Somedinosaurswereassmallaschick
3、ens;otherswereasbigastenelephants.Somecouldevenfly.Manydinosaursateplants.However,somedinosaurslikedtoeatmeat.DinosaurslivedonEarthformorethan150millionyears.Thensuddenly,theyalldiedout.Nobodyknowswhy.However,wecanlearnaboutthemformtheirfossils.ThekingandthericeAlongtimeago,therewasakinginIndia.T
4、hekingfavouritegamewaschess.Oneday,awiseoldmancametopalacesandthekingchallengedhimtoagame.Thekingpromisedtheoldman,“Ifyouwinthegame,youcanhaveanyprize.”Theoldmansaid,“IfIwinthegame,I’dlikeonegrainofthericeforthefirstsquareofthechessboard,twoforthesecond,fourforthethird,andthendoubletheamountforea
5、choftherestsquares.”“Isthatall?”askedtheking“Wouldn’tyoulikegoldorsilverinstead?”“No,justrice.”Repliedtheoldman.Thekingandtheoldmanplayedthegameforalongtime.Finally,theoldmanwon.Sothekingorderedhismentocollectabagofrice.Heputonegrainofthericeonthefirstsquare,twoonthesecond,andsoon.Thekingquicklyr
6、ealizedaproblem.Evenwithallthericeinthecountry,hewouldstillnothaveenoughricetoputonallthesquare!ComputerfactsSmallerandBetterInthe1940s,thefirstcomputerswerebiggerthancars.Nowcomputersarebecomingsmallerandbetter.Somecomputersaretiny.Youmaybeunawareofthem.ThereisprobablyoneinsideyourTVorwashingmac
7、hines.Youdependoncomputersmorethanyourealize.Whatcanwedowithcomputers?Wecanusecomputertocalculate.Theycancalculateatafasterspeedthanwecanandalmostnevergivewronganswers.Wecanalsotypeanddrawthingswithcomputer.Inaddition,
