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1、LESSONTHREEACTIVATION1•Whatisyouropinion?1)Hashumanevolutionbeenanextremelylongorextremelyrapidprocess?2)Doesthehumanbraingrowtoitsnormalsizeinsideoroutsideofthemother^body?3)Whohasthelongestchildhood:aseal,ahuman,amonkey,achimp?4)Dowediffersignificamlyinourbodyandbrainstructur
2、efrommanof20,000yearsago?2.Whatbegantomakeuswhatwearetoday?Whatnowmarkthemoresignificantdifferencesofmanfromapeslikechimps?speakingagrammaticallanguage,doinglabor,abletomakeandusetools,usingfire,walkingontwofeet,havinganakedandnotahairybody,havingamuchlargerbrain,havingsmallert
3、eethandjawsandasmallerfacebelowratherthaninfrontofthebraincase,amosthelplesschildhood3.Fillintheblanks:brain,mind,idea,head,mental1)Eventhecleverestofanimalsareinferiortohumansasfarastheirabilitiesareconcerned.2)Putourtogetherandwemayhituponagood・3)Humancellsareamongthegreatest
4、wondersnaturehaseverproduced.4)Thehumanhascreatedaninvisibleworldofideas,beliefs,habitsandcustoms.TEXTTHEDREAMANIMALLorenEiseleyAlmostallofwhatweknowabouthumanevolutionisconfinedtotheIceAge.Itwas,particularlytowarditsclose,atimeofgreatextinctions.Someofthehugebeastswhoseinterco
5、ntinentalmigrationshadlaiddownthefirstpathsalongwhichmanhadtraveled,vanishedtotallyfromtheearth.Mammoths,theTemperateZoneelephants,droppedthelastoftheirheavytusksalongtherecedingfringesoftheice.Thelong-hornedbisonuponwhoseherdsmanhadnourishedhimselfformanyalongcenturyofillitera
6、tewanderings,fadedbackintothepast.Theapewhoseculturalremnantsatthebeginningofthefirstglaciationcanscarcelybedistinguishedfromchancebitsofstonehas,bytheendingofthefourthice,becomeartistandworldrover,penetratorofthefivecontinents,andmasterofall.Itwouldappearthatwithintheverybrief
7、periodbetweenaboutfivehundredthousandandonehundredfiftythousandyearsago,manacquiredtheessentialfeaturesofamodembrain.Howdidthisbrainfirstcome?Howfastdiditcome?Probingamongrocksandbatteredskulls,scientistsfindthattheanswersarefew.Therearemanylivingmembersoftheprimateorder―hatord
8、erwhichincludesman—wholiveingroups,butshownosignsofbec
