高中英语 Unit 20 New Frontiers Section Ⅲ Lesson 2 Lesson 3—Pre-reading学案（含解析）北师大版选修7-北师大版高二选修7英语学案

Section Ⅲ Lesson 2 & Lesson 3—Prereading[原文呈现]PIONEERS OF SCIENCEIf you had to choose the single most important discovery of the 20th century, you would have a real dilemma① on your hands. In just 100 years, the world changed completely. Amazing discoveries were made② in medicine, communications③ and transport, not to mention④ our knowledge⑤ of the world and space. Medical advances ranged⑥ from discovering the causes of diseases under microscopes⑦ to surgical procedures⑧ replacing diseased organs with donated⑨ ones. Communications changed with the introduction of mobile phones and the way we correspond⑩ went from writing letters to emailing. We started flying around the world and meanwhile⑪ ， scientists figured out⑫ how to split⑬ the atom, previously thought to be the smallest particle of matter in the universe ⑭ .Although it is impossible to choose the most important discovery, it is possible to single out⑮ a few pioneers of the 20th century. Here are five of them.[读文清障]①dilemma/dI'lem /ə n.困境，进退两难的窘境 in a dilemma 处于进退两难的境地②make a discovery 发现③communication n．通讯④not to mention 更不用说⑤knowledge n．知识，学问⑥range vi.(在一定范围内)变动，变化 range from ... to ...从……到……不等⑦microscope/'maIkr skp/əəʊn.显微镜⑧procedure/pr 'si d/əː ʒə n.步骤；程序⑨organ/'ɡ n/ɔː ən.器官donate/d'neIt/əʊvt.捐赠；赠送replacing diseased organs with donated ones 是 现 在 分 词 短 语 作 定 语 ， 修 饰surgical procedures。⑩correspond/ k rI'sp nd/ˌ ɒɒvi.通信；符合⑪meanwhile/'mi nwaIl/ːadv.同时(＝meantime)⑫figure out 弄清楚，弄懂⑬split/splIt/vi.分开，分离⑭ 过去分词短语作定语，修饰 the atom。⑮single out 挑选出，选拔出(～for/as)科学发展的先驱者[第 1～2 段译文]如果要选择 20 世纪最重要的一个发现...