新人教版英語高二下module8unit2cloning之五-資料下載頁
2024-11-17 06:00本頁面
【導(dǎo)讀】1938年:德國科學(xué)家首次提出克隆想法。1952年:科學(xué)家開始用青蛙進(jìn)行克隆實(shí)驗(yàn)。成了蝌蚪,但是在開始進(jìn)食以后死亡。鼠胚胎細(xì)胞培育出了正常的鼠?？茖W(xué)家用取自一只6歲。成年羊的乳腺細(xì)胞培育成功一只克隆羊。1998年2月23日:英國PPL醫(yī)療公司宣布,該公司克隆出一頭牛犢“杰弗遜先生”。用成年動(dòng)物體細(xì)胞克隆的兩頭牛犢誕生。2020年1月3日:美國著名華人楊向中,2020年1月:美國科學(xué)家宣布克隆猴成功,這只恒河猴被命名“泰特拉”。了普通人對(duì)這一話題是多么感興趣,人們時(shí)常設(shè)想從地球上消失的動(dòng)物,fromtimetotime有時(shí),間或,偶爾,克服疾病,克隆動(dòng)物就沒有用。作句子的形式主語。方式不同的動(dòng)物。
【正文】 eggs? Just one would feed a large family. So there39。s more than one reason for producing it in mercial numbers. S1: Did you know that its meat is very tasty too! Perhaps it could be farmed like ostriches and provide a good source of protein. S2: The only problem is that it needs hot climate to survive. But that39。s easy to provide with all its other advantages. I don39。t think any of the other animals stands a chance against the dodo. S1: So we both agree that the best extinct animal to be cloned is the dodo bird. S2: Yes. 3. A sample report() The dodo is the most suitable animal to be cloned for several reasons. First, it became extinct fairly recently so its DNA is still in good condition. Second, it was always described as being a very friendly animal and it would make a good pet. Third, it cannot fly. So it wouldn39。t escape from a park, a family or its home in the wild. You could farm a dodo and sell it as an exotic pet. Fourth, it produces large nutritious eggs which could feed a large family. Fifth, its meat is very tasty too! Perhaps it could be farmed like ostriches and provide a good source of protein. Although it needs hot climate to survive, we feel that this can be easily provided. In return the dodo would provide a most useful source of pleasure and food. Finish Ex. 2, Page16。 Ex. 34, Page17. Homework
教學(xué)課件相關(guān)推薦
鄂ICP備17016276號(hào)-1