Fourtoonetothecomputer．Thatwasthescore．AlphaGo，aprogramdevelopedbyGoogle'sLondon-basedartificialintelligence （AI） teamDeep-Mind，hasjustbeatenahumanatareallycomplicatedgame．ThefieldofhonorisaGo（围棋） boardinSeoul （首尔），SouthKorea．LeeSedol （李世石），aSouthKorean，isaworldGochampionandisconsideredthegame'smostoutstandingplayer．ButhewasdefeatedbyAlphaGo．

ThecontesthasdrawntensofthousandsofonlinespectatorswhohavefollowedthematchesliveontheInternet．VideosofthecompetitionhavereceivedmorethanfourmillionviewssincethecontestbeganonMarch9．Thefive-gamecontesttookaweekinall．Whileatapre-matchpressconference，Leesaidhewasconfidenthewouldwinfivetonil （零分） or，atleast，fourtoone，hedefeatedAlphaGoonlyonceinthefourthgame．

"WhenIlookbackonthethreegames，evenifIweretogobackandredothefirstgame，IthinkIwouldnotbeabletowinbecauseImisjudgedAlphaGo，"Leesaidatapost-gamepressconferenceonMarch12，followinghisthirdstraightdefeat．Go，whichoriginatedinChinathousandsofyearsago，isplayedona19x19boardwithblackandwhitestones （棋子）．Theboard'ssizemeansthenumberofpossiblemovesisgreaterthanthenumberofatomsintheobservableuniverse．Goissaidtobetheonlygamethattrulybalancestheleftandrightsidesofthebrain．AccordingtoDemisHassabis，theleadingfounderofDeepMind，Goposesamoredifficultprogrammingchallengethanchess．AlphaGo'ssuccessmarkedthemostsignificantmilestoneeverinAI．

YetAlphaGoisonlygoingtogetsmarterasitgathersmoredatafromwhichitlearns．Askedwhethertherewasaceilingtoitsabilities，Hassabissaidhedidnotknow．"Ifthereis，wehaven'tfoundityet．"

25．WhichofthefollowingisTRUEaboutGo？___

A．GoisagamedatingbacktomillionsofyearsagoinChina．

B．Goisplayedona19x19boardwithblackandredstones．

C．ThepossiblemovesofGoisbeyondourimagination．

D．Goistheonlygamethatwilldogoodtoyourbrain．

26．ThecontestbetweenAlphaGoandLeeSedol___．

A．endedupwithfivetonil

B．lastedmorethanaweek

C．arousedpeople'slovetothegameofGo

D．drewmanype