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1、Uint8II.BasicListeningPractice1.ScriptM:Scentistsclaimtheworldpopulationhas99.5%ofthesameDNA.W:Butthisdoesn’ttellusthereisnosuchthingasrace.Q:WhatistrueoftheDNAofdifferenceraces?2.ScriptW:Withtheadventofthegeneticmapweknowwhereeverythingis,butdoweknowwheretogowithit?M:Yourm
2、apseemstodifferlargelyfrommygeographicalmap!Q:Whatdoesthemanimply?3.ScriptM:Asyouknow,ithastakenmillionsofyearsofevolutionandnaturalselectiontogetuswherewearetoday.W:Yes,butnowthatwehavegeneticengineering,weseemtohavedecidedthatwewanttobeGod.Q:Whatdoesthewomanimply?4.Script
3、M:Ithinktheresearchintocloningwillleadusintodangers,fillinguswithfalsehopesofperfection.W:It’stoolatetoturnbacktheclock.We’lljusthavetodependoncommonsensetosolveuncommonproblems.Q:Whatdoesthewomanmean?5.ScriptW:InAmerica,manyprisonersarehavingtheircasesreviewed,andsomehavee
4、venbeenfreedthroughDNAtesting.M:Exceptfortheoneswhosedeathsentencehasalreadybeencarriedout.Q:WhatcanwelearnaboutDNAtestingfromthedialog?Keys:1.B2.C3.D4.A5.CIII.ListeningInTask1:StemCellResearchScriptGregory:TheRepublicanpartyinAmericaisopposingstemcellresearch.Ifindithardto
5、believethatinthisdayandage,someonewoulddothat.Lillian:Stemcellresearchsoundsprettyimpressive,I’lladmit.Butjustwhatisit?Gregory:Well,astemcellisaspecialtypeofcell.Itisageneralcellthat,whenitdevides,canbecomeanyspecifictypeofcell.Lillian:Youmean,astemcellcanbecomeaheartcell?O
6、rabrainorakidneycell?Gregory:That’saboutit.Stemcellsareapartofthebody’smaintenanceandrepairsystem.Whentheydivide,theycanbecomeanycelltype.Lillian:Iguesstherewouldbesometremendousmedicaladvantagesinthatsortofresearch.Gregory:You’vesaidamouthful.Recently,scientistswereabletoh
7、elpamanwholostajawboneforcancer.Theyrecreatedbonematerialforhisjawfromstemcells.Whatitmeansisthatsincethenewbonewascreatedoutoftheperson’sowncells,therewasnoproblemwithrejectionbecausetheDNAwasthesame.Lillian:Ibetthepersonwasdelighted.Whywouldanyoneopposethatsortofresearch?
8、Itwouldseemtohaveendlesspotentialtobenefitthehumanrace.Gregory:Iagree,buttherearep
