高中英语人教版必修五Unit 1 Great scientists Reading课件（24张）

课件24张PPT。高二必修5Unit 1 Great Scientists Reading Do you know how to prove a new idea in scientific research? Discuss in small groups the stages in setting out a new scientific idea. 情景导入学习目标1.通读文章，概括段意，总结大意。 2.掌握Scanning 和Skimming阅读技巧。 3.根据文章回答问题。学习101名师微课，及阅读Reading部分文章，了解大意。课前自主学习What do you know about infectious diseases? What do you know about cholera?自主学习反馈Germany Great BritainDeath of first cholera case in London during the 1848-49 epidemic LondonPrevious cholera epidemic in Great Britain in 1831-32The spread of cholera自主学习反馈Look at the picture, the map and the title and predict the content of the reading passage. Then skim it quickly to see if you are right.自主学习反馈ReadingJohn Snow Defeats “King Cholera”John Snow新课讲解SkimmingRead the text (P2-3) quickly and complete the main idea of it. The text is mainly about _____ _____ and how he _____.Johndefeated choleraSnow新课讲解I. To prove a new scientific idea, seven stages are needed. Read the text (P2-3) carefully and fill in the blanks.Careful reading新课讲解cause absorbed multipliedcure新课讲解map provesource新课讲解Broad StreetMany deaths happened here.No death happened here.The water from the pump was to blame.Public houseSmall, white, flocculent particlesThe water was from the river which had been polluted by the dirty water from London.新课讲解 drinking the water Polluted waterexaminedextra evidence: A woman and her daughter who lived far away but drank the water also died.新课讲解Number these events in the order that they happened. __ John Snow began to test two theories. ___ An outbreak of cholera hit London in 1854. ___ John Snow marked the deaths on a map. 124Post reading新课讲解___ He announced that the water carried the disease. ___ John Snow investigated two streets where the outbreak was very severe. ___ King Cholera was defeated. ___ He found that most of the deaths were near a water pump. ___ He had the handle removed from the water pump.35678新课讲解Answer these questions. John Snow believed Idea 2 was right. How did he finally prove it?John Snow finally proved his idea because he found an outbreak that was clearly related to cholera, collected information and was able to tie cases outside the area to the polluted water.新课讲解2. Do you think John Snow would have solved this problem without the map? Give a reason.No. The map helped John Snow organize his ideas. He was able to identify those households that had had many deaths and check their water-drinking habits. He identified those houses that had had no deaths and surveyed their drinking habits. The evidence clearly pointed to the polluted water being the cause. 新课讲解3. Cholera was a 19th century disease. What disease do you think is similar to cholera today? Why?Three diseases, which are similar today, are SARS, AIDS and bird flu, because they are serious, have an unknown cause and need public health care to solve them.新课讲解G ... ...