20xx人教版高中英语必修五unit1greatscientistsperiod2内容摘要：
in 10 days? John Snow Cholera outbreak hit London. 500 4. 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. A map of Broad Street What method did he use? Many deaths happened here. No death happened here. The water from the pump was to blame. Public house Task 2 Read and answer 1 Why couldn’t the cholera be under control at first? 2 Which theory did John Snow believe in? Neither its cause, not its cure was understood. People absorbed cholera into their bodies with their meals. 3 John Snow finally proved the theory he believed by ________. A. gathering information with the hel。阅读剩余 0%
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