全书（教师用书电子教辅）-【优化指导】2021秋新教材高中英语选择性必修第二册（人教版2019）

诺贝尔生理学或医学奖得主、英国科学家约翰·格登爵士称，那些在事故中失去子女的父母将能在未来50年内借助克隆技术，让他们的子女得到“重生”。 Sir John Gurdon，a British scientist，who won the Nobel Prize in Physiology or Medicine in 2012，said he had predicted at the time of his frog experiments that the successful cloning of a mammal would happen within 50 years，and that “maybe the same answer is appropriate①” for the step to human cloning.Parents who lose children in accidents may be able to clone “copies” to replace them then. Although any attempt to clone an entire human would raise complex moral issues，the biologist claimed people would soon overcome their concerns if the technique became medically② useful.Cloning was regarded with extreme doubts when it was first developed but became widely accepted after the birth of Louise Brown，the first “test­tube baby”．He said，“When my first frog experiments were done，an American reporter asked how long it would be before these things could be done in mammals or humans.I said，‘Well，it could be anytime between 10 years and 100 years—how about 50 years？’ It turned out that it wasn't far off the mark as far as Dolly was concerned.Maybe the same answer is appropriate.” Sir John added that cloning a human being effectively means making an identical③ twin，and doctors would therefore simply be “copying what nature has already produced”．, The average vote on allowing parents of deceased④ children，who are no longer fertile （能生育的），to create another by using the mother's eggs and skin cells from the first child，thinking the technique was safe and effective，is 60 percent in favor.The reasons for “no” are usually that the new children would feel they are some sort of replacements for something.,\a\vs4\al([微积累]), ①appropriate adj.合适的；适当的 ②medically adv.医学上地 ③identical adj.完全同样的；相同的 ④deceased adj.亡故的；已死的 语言技能：①掌握­tion，non­等派生词构词法；②掌握重点词汇和句式；③掌握表语从句等名词性从句的用法；④学会用英语谈论科学现象的技能。 素养提升：①了解典型人物的生平、生活、精神等领域并学会对其进行系统描述、介绍的方法，学会应用所学词汇和句式写人物传记；②通过阅读课文，使学生感悟科学家的周密观察、勇于探索、认真分析的科学精神，了解科学发现的全过程及其科学的严密性。 Section Ⅰ　Readin