必修五unit1reading（教育精品）.ppt

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1、John Snow defeats“King cholera”Who is John Snow?a famous doctor in London.relationship attended her as her personal physician.Whats the main idea of the passage?Whats the main idea of the passage?A.John Snow was a well-known doctor in London.B.The cause of Cholera was polluted water.C.The source of

2、all drinking water should be examined.D.How John Snow defeated“King Cholera”?Careful reading1.What was the most deadly disease in 19th century?Why?2.When could the cholera be controlled?The cholera,because neither its cause nor its cure was understood.John Snow knew it would never be controlled unti

3、l its cause was found.Make a question:Which theory to believe in?Cholera multiplied in the air,floated around until it found its victims.People absorbed it with their meals.Idea 1 Idea 2A map of Broad StreetWhat method did he use?Broad StreetMany deaths happened here.No death happened here.The water

4、 from the pump was to blame.Public houseAnalyze the results:What happened to the pump water?The water was from the river which had been polluted by the dirty water from London.Find supporting evidence:What extra evidence did he find?A woman and her daughter who lived far away but drank the water also died.Draw a conclusion with certaintyThe polluted water carried the virus.