Keys to u3.pptVIP

KEYS TO U3 一 1，Because he thinks that stem cell research holds a promising future and will make a difference for millions of Americans . 2,Their power: the extreme flexibility and capacity for growth . 3,Geron hopes to start clinical trials of hES cells to treat spinal cord injuries as early as summer 2006. 4,Most stem cell researchers view Geron’s plans with skepticism and caution that a premature trial in patients could seriously damage this field. 5,Geron has some advantages to carry out its plans—fund, a number of patents and exclusive licenses, and above all, a team of experts led by Hans Keirstead, a neuroscientist at the University of California. 6,A differentiation procedure is important in his tests. He used specialized cells instead of na?ve ES cells. 7,For example, hES cell therapies could introduce external animal viruses into patients because cultured cells are often kept alive with fetal calf serum, and most hES cell lines have been grown on layers of mouse cells called feeder cells. 8,Gage and his colleagues noted that the sugar gradually disappears once cells are removed from the feeder layers. 9,No.Because cellulars products are much more complicated ,and it is less clear what sorts of measures will be used to evaluate cell populations. 10,They feel uncertain but they are very sensible. Key to Ex on P75-78 + 83 (Unit 3) IV. Multiple Choice 1. B 2. D 3. C 4. A 5. B 6. A 7. C 8. D 9. A 10. B V. Blank filling 1. bloodstream 2. injections 3. chronic 4. organs 5. nerves 6. complications 7. drugs 8. treatment 9. secretion 10. detection VI. Cloze (P77-78, Unit 3) 1. C 2. B 3. A 4. D 5. A 6. D 7. B 8. C 9. B 10. B 11. C 12. D 13. D 14. A 15. B 16. C 17. D 18. B 19. C 20. A L II. Word and phrase translation (P83, Unit 3) A. 1. 脊髓损伤 2.专用许可证 3.自然愈合 4.中枢神经系统 5.供养/ 滋养细胞 6.异质的 7.(人工)培