1、John Snow Defeats“King Cholera”About choleraIt was a(1)_ disease of its day.People didnt know its cause or its(2)_.Many thousands of people died every time there was an outbreak.Two(3)_Cholera was spread in a cloud of gas.Cholera was spread by germs.John Snows opinionCholera was spread by germs.John
2、 Snow Defeats“King Cholera”The course of finding evidenceAs the disease spread quickly through poor (4)_ of London,he began to gather information.He found the outbreak was particularly(5)_ in two streets.After further investigations he discovered it seemed that the water was to(6)_.When people didnt use the(7)_ water,the disease slowed down,which showed that cholera was really spread by germs.(8)_ to prevent cholera from happeningJohn Snow suggested that the(9)_ of all the water supplies be examined.The water companies were(10)_ not to expose people to polluted water any more.
