必修5-Unit-1-Reading-史上最全面全优秀的课件.ppt

* Which theory is correct? Cholera________ in the air without reason. A cloud of dangerous gas would ______ around until it found its ________. People _______ it with their meals. 2.make up a question multiplied float victims absorbed What is the method of doing this research? To gather information in two particular streets. 3. hink of a method * 3. think of a method A map of Broad Street What method did he use? Broad Street Many deaths happened here. No death happened here. The water from the pump was to blame. Public house 4. collect results * What happened to the pump water? The water was from the ____ which had been _______ by the _________ from London. 5. analyse the results river polluted dirty water * What extra evidence did he find? A woman and her daughter who lived far away but drank the water also died. 7. draw a conclusion with certainty The polluted water carried the disease. 6. find supporting evidence II. True (T) or false (F): 1. Cholera would never be controlled even if its cause was found. 2. The disease attacked the body quickly from the stomach and soon the affected person died. 3. John Snow began to collect the information before the disease spread. F T F 谁是谁非 4. In two particular streets, 500 people died in 10 days when another outbreak hit London in 1854. 5. Deaths of the woman and her daughter were linked to the Broad Street outbreak. 6. Only ordinary people died when cholera broke out. F T F Summery: John Snow was a well-known ____ in London in the ___ century. He wanted to find the ______ of cholera in order to help people ______ to cholera. In 1854 when a cholera ____ out, he began to gather information. He _____ on a map where all the dead people had lived and he found that many people who had drunk the dirty water from the ______ died. So he decided that the polluted water carried cholera. He suggested that the _____ of all water supply be _______ and new methods of dealing with polluted water be found.