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1、Unit 1 Great Scientists,SARS, an deadly infectious disease hit China.,Which person impressed you most during the SARS?,Zhong Nanshan (钟南山),John Snow,British ( 1813 1858) a figure(人物) in the history of public health, epidemiology(流行病学) and anesthesiology(麻醉学),Do you know how to prove a new idea in sc
2、ientific research?,eight stages,What order would you put them in?,Make a conclusion Think of a method Collect results Make up a question Find a problem Analyse the results Repeat if necessary Find supporting evidence,What is Cholera?,Cholera is the illness caused by a bacterium(细菌) called Vibria cho
3、lerae(霍乱弧菌) . It infects peoples intestines (肠), causing diarrhea(腹泻), vomiting(呕吐) and leg cramps(抽筋) .,John Snow defeats “King cholera”,Reading,Whats the main idea of the passage? John Snow was a well-known doctor in London. The cause of Cholera was polluted water. The source of all drinking water
4、 should be examined. How did John Snow collect, analyze the information, find the cause of the disease and solve it .,What happened in 1854? How many people died in 10 days? Why is there no death at No. 20 and 21 Broad Street as well as at No. 8 and 9 Cambridge Street?,Skim and Scan,1. What happened
5、 in 1854? 2. How many people died in 10 days?,Cholera outbreak hit London.,500,3. Why is there no death at No. 20 and 21 Broad Street as well as at No. 8 and 9 Cambridge Street?,These families had not drunk the water from the Broad Street pump.,Put the correct stages into the reading about research
6、into a disease.,Para. 1:,Para. 2:,About cholera,Which theory is right?,Main ideas,Para. 3:,Test two theories,Para. 4:,Mark the death on a map,Para. 5:,Find the source of the water,Para. 6:,Find supporting evidence: Two other deaths,Polluted water carried the disease,Paragraph 7:,Prevention of Choler
7、a John Snow defeated King Cholera,Detailed reading,What was this map used for in 1854?,Finding out the cause of Cholera.,Why couldnt the cholera be under control at first? Neither its cause, nor its cure was understood.,Whats the two theories?,Strange cloud in the air that attacked people. People ab
8、sorbed the disease with their meals.,When the cause was found, what did the people do？,Remove the handle from the water pump so it could not be used.,What are John Snows suggestions?, The source of all water supplies should be examined. New methods of dealing with polluted water should be found. The water companies were also instructed not to expose people to polluted water anymore.,
