U20-Lesson-3-Scientific-Breakthroughs.ppt

1、Lesson 3 Scientific Breakthroughs,Pioneers of Science,Divide the passages into three paragraphs and get the main idea,Part 1 (1) It is impossible to choose the most important discovery of the 20th century. Part 2 (2-8) the brief introductions of five pioneers of the 20th century. Part 3 (9) Without

2、the breakthroughs of these pioneers, the world would be quite different.,The scientists and their breakthroughs,E=mc,1905,other galaxies,After the First World War,penicillin,1929,the first computer,the Second World War,microwave oven,Do Ex. 2 p 24,Which discovery or invention mentioned in the text h

3、as been the most important so far? Why?,As far as Im concerned, among all the discoveries and inventions, the discovery of penicillin is the most important, because at that time, many people died from infection, which was a big disaster for human beings. Due to the discovery of penicillin, many peop

4、les lives have been saved. In my opinion, whatever can keep people healthy and bring us well-being is the most important.,Discussion,vocabulary,更不必说 在范围内变化 有深远影响的 大规模生产 努力解决 （灯）灭掉 致力于 对感激 偶然地,not to mention,range from to,far-reaching,mass-produce,wrestle with,go out,be dedicated to,be grateful to sb

5、.,by mistake,Difficult points,If you had to choose the single most important discovery of the 20th century, you would have real dilemma on your hands. Without the breakthroughs of these pioneers in science and technology, whether lucky or planned, the world as we know it today, would have been a com

6、pletely different place.,3. It measured 100 feet long by over 10 feet high and weighed over 30 tonnes. Measure v. The tree measures 20 metres tall. This room measures 10 metres across. measure the distance measure sb. with ones eye （ ） measure the importance of an issue Measure your needs to your in

7、come. ( ） N. take measures to do sth. be made to ones own measure ( ),打量某人,量入为出,量体裁衣,by The room measures 15 feet by 20 (feet). weigh vi. The box weighs ten pounds. The traffic rule says young children under the age of four and _ less than 40 pounds must be in a child safety seat. A. being weighed B

8、. to weigh C. weighed D. weighing,D,4. With 18,000 tubes, thousands of circuits and 6, 000 switches, it used so much energy that when it was turned on, the lights in the local town went out!,Translation,1. 这场演出有众多的观众， 从老人到孩子。 The show had a massive audience, ranging from children to grandparents. 2.

9、 有很多的古玩珍宝， 故宫每天都吸引这么多的游客， 以至于总是很拥挤。 With many antique objects and treasures, the Forbidden City attracts so many visitors that it is crowded every day.,3. 如果没有这些人的奉献， 我们今天的生活就会很不同。 Without the dedication of all those people, our life today would be quite different. 4. 他们对我们为社区所做的一切充满感激。 They were grateful to us for what we had done for the community.,5. 只有当那时候， 我才意识到我错拿了别人的旅行箱。 Only then did I realize that