人教版必修五_unit1_great_scientists-_reading.ppt

It begins in the stomach and a severe case can lead to death without immediate treatment. The victims died very quickly from a loss of liquid after severe vomiting(呕吐) and diarrhoea(腹泻). 2. What do you know about cholera? Germany Great Britain Death of first cholera case in London during the 1848-49 epidemic London in 1831 78,000 people died The spread of cholera John Snow Defeats “King Cholera” The text is mainly about _____ ______ and how he _______________. John defeated the deadly cholera Snow Draw a conclusion Find a problem Make up a question Think of a method Collect results Analyse the results Para 1 Para 2 Para 3 Para 4 Para 5 Para 6 Find supporting evidence Para 7 What is the problem? The cholera was the most _____ disease of its day. Neither its ____, nor its ___ was ________. What caused cholera? Details 1. Find a problem deadly cause cure understood two theories Cholera_________in the air.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 caused cholera? Which theory is correct? 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 analyze the 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 Many people died of _______. John Snow tried to find out its _____ ____ cause cure Post-reading cholera Theory 1 Theory 2 gather information in_________________ two particular streets mark on a ______ map Families were given free beer in th