牛津譯林版高中英語(yǔ)必修五unit 3《science and nature》ppt練習(xí)課件5-文庫(kù)吧
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【正文】 osa u r w e r e ally clone din osa u r s? In t h e or y? Y e w e ll p r e se r ve d sou r c e of DN A f r o m t h e e xt in c t d in osau r ， a n d a c losely r e lat e d sp e c ies ， c u r r e n t ly li vin g ，t h at c oul d se r ve as a su r r ogat e ( 替代的 ) m ot h e r . Unit 3 Science and nature In r e ality? Pr obab ly n ot .It ’ s n ot li k e ly t h at d in osau r DN A c oul d su r vive u n d am age d f or su c h a lon g t ime .How e ve r ，sc ientist s h ave t r ied t o c lon e sp e c ies t h at b e c a m e e x t in c t m o r e r e c e n t ly ， u si n g DN A f r o m w e ll 173。 p r e se r ve d t issu e sam p les. No j oke! If you r e ally w ante d t o ， an d if yo u h ad e n ough m oney ， you could c lon e your 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。 Re ading — W ar m i ng U p Ⅰ 重點(diǎn)單詞 1 ． ___________ adj . 精確的 ， 準(zhǔn)確的 2 ． ___________ v t . 克隆 n . 克隆出來(lái)的動(dòng)物或植物 3 ． ___________ n . 意圖 ， 目的；企圖 4 ． ___________ n . 憂(yōu)慮 ， 焦慮 ， 不安 5 ． ___________ v t . 收養(yǎng) ， 領(lǐng)養(yǎng)；采納 ， 采用 6 ． _______
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