Unit1_Reading_精品课件.ppt

3. Why was cholera called “King Cholera” in the text? Because it caused many deaths. B. Because it got its name from Queen Victoria. C. Because it was defeated with the help of the King. D. Because it was the most deadly disease of its day. 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. 1 2 4 ___ 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. 3 5 6 7 8 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 or treated with chlorine or iodine. Other safe drinks include tea or coffee made with boiled water and carbonated, bottled beverages with no ice. What should you do if you’re travelling to a count