牛津譯林版高中英語必修五unit3scienceandnatureppt練習(xí)課件5-文庫吧資料
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【正文】 our b e love d f am il y c at .At lea st o n e b iote c h n ology c om p any in t h e Unite d S t at e s of f e r s c at c lon in g se r vic e s an d t h e y ar e n ow w or k i n g t o c lon e d ogs. Unit 3 Science and nature Clon in g Hu m an s? T o c lon e or n ot to c lon e : that is the q u e stion .T h e view of c l on in g h u m an s is h igh ly contr ove r sial an d r aises a n u m b e r o f e thical ( 倫理的 ) ， leg al an d social c h all e n ge s that n e e d t o b e c on sid e r e d . Wh y w o u ld an yon e w a n t to c l on e h u m an s? T h e y w an t to h e lp c h i ld less c ou p les h ave c h il d r e n or to r e p lace a d e ad c h il d . Unit 3 Science and nature Sec t ion Ⅰ W elc o m e t o t he u nit amp。Unit 3 Science and nature 大家對 “ 克隆 ” 這個名詞已經(jīng)不陌生了 ， 可是人們?yōu)槭裁匆寺∧?？克隆出另外一個自己 ， 為你做作業(yè) ， 而你去和朋友打球或玩游戲嗎？那就讀一讀下面這篇文章吧！ Unit 3 Science and nature Re se ar c h advan c e s ove r t h e p ast d e c ade have t old u s tha t ， w ith a li t t le w or k ， w e h u m ans c an clone j u st a b out anythi n g w e w ant ，f r om f r ogs t o m onk e ys and p r obab ly e ve n ourse lve s! So ， w e c an clone t h in gs ， b u t w h y? Let ’ s look at som e of t h e r e ason s. Unit 3 Science and nature Of all t h e r e ason s ， c lon in g f or m e d ica l p u r p ose s is t h e m ost p ot e n t ial t o b e n e f it la r ge n u m b e r s of p e opl e .M u c h of w h at r e se a r c h e r s lea r n abou t h u m an d isease c o m e s f r om stud yin g ani m al m odels su c h as m ice .Of t e n ， ani m al m odels ar e ge n e t ica ll y e n gin e e r e d t o c ar r y d isease 173。 c aus in g c h a n ge s in t h e ir ge n e r e at in g t h e se t r ans ge n ic ( 轉(zhuǎn)基因的 ) ani m als is a p r oc e
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