Unit1 Science and Scientists Reading and Thinking 课件-2023-2024学年高中英语人教版（2019）选择性必修第二册

Unit1 Science and Scientists 1 novel coronavirus What’s special about this kind of virus? 2 What disease is mentioned in the video? What do you know about it? 4 London, 1854 Prediction John Snow Defeats “King Cholera” What may be talked about in the passage? 6 Read the passage quickly and find the topic sentence of each paragraph. paragraphs topic sentences 1 2 3 4 5 Cholera used to be one of the most feared diseases in the world, until a British doctor, John Snow, showed how it could be overcome. In general, doctors in those days had two contradictory theories to explain how cholera spread. The truth was that the water from the Broad Street pump had been infected by waste. Through Snow’s tireless efforts, water companies began to see clean water, and the threat of cholera around the world saw a substantial decrease. Snow began by marking on a map the exact places where all those who died had lived. what who how why results influence/contribution 7 Detailed Reading （paragraph 1） 1. Why was cholera feared by so many people at that time? 2. What did John Snow want to do at that time? Because this illness causes severe diarrhoea, dehydration, and even death. He never lost his desire to destroy cholera once and for all. Did John Snow have to do this? 8 Detailed Reading （paragraph 2-3） ① There are two___________theories: cholera was caused by bad____or germs in_______________. ② John Snow wondered why in two________streets cholera was so______that many people died. ③ John Snow_________________the places where the people______had lived. ④ John Snow investigated how many people died in each__________. ⑤ Many deaths occurred near the __________in Broad Street, while some people who_________drunk the water lived. ⑥ A woman and her daughter died in another part of London after___________________________. ⑦ John announced the water pump carried_______________. contradictory air food or water particular severe marked on the map died household water pump hadn’t dri