人教英语选修8第二单元warming_up_and_reading.ppt

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1、Unit2cloningwarmingupandreadingIfyoucomeacrossamanwholooksthesameasyou,whatwillyoudo?1.cameuptoshakehandsandhaveahug2.walkonpretendingtoseenothing.MyGod!IwasclonedAsoneofthegreatestscientificandtechnologicalinventionsinthe20thcentury,itischangingourlife.Whatisclone?1.Whati

2、saclone?Acloneisananimaloraplantproducednaturallyorartificiallyfromthecellsofanotheranimalorplantandisexactlythesameasit.2.Whatcanbeclonedandhowmanykindsofclonedoyouknow?Bothplantsandanimalscanbecloned.Therearetwokindsofcloning:naturalcloneandman-madecloneClone?Naturalclon

3、eMan-madecloneNaturalcloneisonethatoccursfromthe“parent”inanaturalformofcloningwithouthumanhelp.Man-madecloneisoneproducedthroughhumanintervention(介入).Inpairs,lookatthesepicturesanddiscusswhichonesarenaturalclonesandwhichonesareman-made.Explainhowtheydiffer.WarmingupDollya

4、ndtheFatherofDolly–IanWilmut(伊恩·威尔姆)1996Dolly&herdaughterTwinsTheyarebornnaturallyandidenticalinsexandappearance.NaturalcloneAstrawberryplantThenewplantsthatgrowfromtherunnersareexactcopiesoftheoriginalplant.Naturalclone一株草莓依靠它沿地“爬走”的匍匐茎,一年内就能长出数百株草莓苗。富贵竹插枝即活Thegardenersho

5、uldcuttheplant,thenthecuttingproduceanothernewplant.Naturalclone2001cloningcattleMan-madeclone2002cloningcatsMan-madecloneCloning:Whereisitleadingus?Reading1.Whatisthemaintopic?A.Cloning.B.Dollythesheep.C.Itwillleadustosomeplaces.2.Whatisthewritingstyle?A.Expositive(说明性的).

6、B.Descriptive.C.Argumentative(议论性的).D.narrativeAAScanningLearningtips:Thepassageiswrittenintheexpositivestyle.Thatistosaythetextisinthethirdpersonandinfactualandformallanguage.Itgivesdifferentpointsofviewanddoesnottrytopersuadethereadertomakeuphis/herownmind.Carefulreading

7、Themainideaofeachparagraph.Cloningis________________________________________________________2.Cloninghas____________uses.3.The_________ofDolly.4.The________ofcloninginsociety.5.Thetowardscloning.awayofmakinganexactcopyofanotheranimalandplant.problemstwomajoreffectattitudes

8、Ithappensbothin________andin_______.Theycanbeclonedby__________and________.plantsanimalst