2019-2020学年度人教版必修五Unit1Great scientists Period1Reading学案
1. Read the passage and number these events in the order that they happened.
---John Snow began to test two theories.
---An outbreak of cholera hit London in 1854.
--- John Snow marked the deaths on a map.
---He announced that the water carried the disease.
---John Snow investigated two streets where the outbreak was very severe.
---King Cholera was defeated.
---He found that most of the deaths were near a water pump.
---He had the handle removed from the water pump.
2. Read the passage and answer these questions.
John Snow believed Idea 2 was right. How did he finally prove it?