2020-2021学年高中英语Unit2CloningSectionⅣUsingLanguage教师用书教案新人教版选修8

Unit2CloningUnit2CloningTHERETURNOFTHEDINOSAURS?THERETURNOFTHEDINOSAURS?Thepossibilityofcloningfierceandextinctwildanimalshasalwaysexcitedfilmmakers.Andtheyarenottheonlyones！Thepopularity(受人喜爱)offilmssuchasJurassicPark，inwhichascientistclonesseveralkindsofextinctdinosaurs，proveshowtheideastruckamixtureoffearandexcitementintopeople'shearts①.Butinfactwearealongwayfrombeingabletocloneextinctanimals.Scientistsarestillexperimentingwithcloningmammals.Thisisbecausethecloningofmammalsisstillanewscienceanditsstoryonlybeganseriouslyinthe1950sasthislistshows②：1950scloningoffrogs1970sresearchusingtheembryosofmice③1979workonembryosofsheepandmice1981firstexperimentalclonesofmice1983firstexperimentalclonesofcows1996firstcloneofamammal：Dollythesheep2000cowgavebirthtoabison(北美或欧洲野牛)2001China'sfirstclonedtwincalves(小牛)2002firstclonedcats2005firstcloneddog．．．恐龙的回归？克隆凶猛和灭绝的野生动物的可能性一直使电影制片商感到兴奋。然而他们并不是唯一对此感到兴奋的人！在《侏罗纪公园》这部影片中，有一位科学家克隆了好几种不同的绝种恐龙。类似这样的电影很受欢迎，证明了这一想法使人们感到既兴奋又恐惧。但事实上，要想克隆绝种动物，我们还有很长的路要走。科学家们现