高中英语 Unit20（5）学案 北师大版选修7.doc

unit20 new frontiers导学案(5)lesson 3-scientific breakthroughs第二课时tips: “creativity in science could be described as the act of putting two and two together to make five.” - arthur koestlerlearning aims(学习目标):a(层次): learn and recite the new words in lesson 3b:keep the important words,phrases in mind. c,d:learn the important words and phrases of this part.the important language points in lesson 3,para.2-para.9important and difficult point: undestand the wholpassage(学习重点、难点) thoroughly and learn to analyze the long complicated sentences.learning procedures(学习过程):steplanguage points.(c级)para.21single out意为：挑选(a级) eg. she was singled out for criticism.我来译: para.32. this outspoken young man was rocking his one-year-old baby when he was suddenly inspired. (b级) 译文: be doing when意为 句型联想 be about to do when意为 词语解析 inspire v.鼓舞，激起；给予灵感 rock v. 摇动,惊吓 n. 硬物,石块 练一练 (c级)这则消息震惊了全世界.（rock）3.e=mc2 showed how a small piece of mass could produce an unbelievable amout of energy. (b级)译文: 词语解析mass n. (1)quantity of matter without a regular shape (2) a large number of短语拓展 a mass of和masses of表示许多，大量；即可修饰可数名词也可修饰不可数名词para.44.edwin hubble was about to make astronmys greatest breakthrough of the century. (b级)译文: be about to do意为 5.he discovered small areas of mist which were in fact galaxies like our own, millions of light years away from us, which proved that the universe was vastly larger than (what) had previously been thought. 句子分析 (c级) 这是一个主从复合句，which were in fact galaxies like our own,为 从句，修饰small areas of mist作它的定语。which proved that the universe was vastly larger than 为 从句,修饰整个句子。that the universe was vastly larger than 为 从句，做proved的 语。para.66.fleming remained modest about the amazing outcome of his dicovery. (b级)译文: 复习回顾remain意思为: ,是 （词性），后可接 。para.77. the navy turned to eckert,an enginner,and mauchly,a physicist,to wrest with the problem and produce a machine to do the job. (b级)译文: turned to意思为: wrest with sb./sth. 意思为: 练一练(c级)armed guards wrestled with the intruder.译文: she had spent the whole weekend wrestling with the problem.译文: 8. it measured 100 feet long by over 10 feet high and weighed over 30 tons. (b级)译文: measure 意为：有.的尺寸，by为prep. 意为:乘以。para.89.these pioneers of the 20th century were all dedicated to imprving the quality of human life on earth,but sometimes breakthrough discoveries that have affected.(c级)译文: 句子分析这是由but连接的两个分句。在第一个分句当中be dedicated to意思为“专注于，献身于”，to是 词。在第二个分句当中that have affected our lives today为 从句作breakthrough discoveries的 语。para.910.there is no doubt about it. (b级)译文: 句型联想there is no doubt that从句 是毫无疑问的step 当堂检测(1).choosing the best answers. (c级)1.a mass of information _ ( have ) been collected by them. 2.masses of books _ ( have ) been sent to the countryside.a. have b.has c.had3. the box _ two metres by two metres and _ a ton.a.measures; is weighed b. is measured; is weighedc. is measured; weighs d. measures; weighs(2)useful expressions(b级)1 base on/upon_ 2 figure out_3 inspire sb to do sth. _ 4 according to_5 turn to sb. _ 6be about to .when_7wrestle with th. _8.here is no doubt about it. _ (3).translation(c,d级)1.我正要出去,这时电话铃响了。(be about