人教版高中英语必修5第一单元Reading.ppt

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. 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. 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. Drink only water that you have boiled. Other safe drinks include tea or coffee made with boiled water. What should you do if you’re travelling to a country that has a cholera outbreak? Eat only food that’s been thoroughly cooked and is still hot, or fruit that you’ve peeled yourself. Avoid undercooked or raw fish and shellfish. Avoid raw salads and vegetables. Boil it, cook it, peel it, or forget it. 人教课标 高二 必修 5 Unit 1 A quiz: Match the inventions with their inventors below Alexander Bell electricity Thomas Edison the First telephone Laite Brothers the electric Lamp Marie Curie black holes in Universe Franklin Theory of Gravity Steven Hawking the First Plane Elbert Einstein Radium Isaac Newton the Theory of Relativity Who is he? He is … Archimedes (阿基米德) Which scientist discovered that objects in water are lifted up by a force that helps them float? Ch