Unit 1 Science and Scientists Reading and Thinking 语言点课件-2023-2024学年高中英语人教版（2019）选择性必修第二册

选修一 Unit 1 Reading and thinking 知识点讲解 课堂•重难突破 课前•基础认知 Teaching aims学习目标: 1. Understand the usages of the important words and phrases. 2.Help Ss analyse the long and difficult sentences. 3.Apply the knowledge learnt to do exercises. JOHN SNOW DEFEATS "KING CHOLERA" Cholera used to be one of the most feared diseases in the world, until a British doctor, John Snow, showed how it could be overcome. This illness causes severe diarrhoea, dehydration and even death. In the early19th century, when an outbreak of cholera hit Europe, millions of people died from the disease. As a young doctor, John Snow became frustrated because no one knew how to prevent or treat cholera. In time, he rose to become a famous doctor, and even attended to Queen Victoria when she gave birth. However, he never lost his desire to destroy cholera once and for all. 过去常常是/过去常常做某事 one of +adj最高级+n复数 宾语从句 n.爆发 break out 爆发 数百万+n复数 死于+外因 die of+内因 作为 懊恼的；沮丧的 定语从句 宾语：疑问词+不定式 后来；及时 照顾；照料 分娩；生孩子 时间状语从句 最终地；彻底地 失去做某事的欲望 desire to do sth想要做某事 死亡 同位语 A, B and C 课堂•重难突破 课前•基础认知 Para 2 In general, doctors in those days had two contradictory theories to explain how cholera spread. One theory was that bad air caused the disease. The other was that cholera was caused by an infection from germs in food or water. Snow subscribed to the second theory. It was correct, but he still needed proof. Consequently, when an outbreak of cholera hit London in 1854, Snow began to investigate. He discovered that in two particular streets the cholera outbreak was so severe that more than 500 people died in ten days. He was determined to find out why. 一般说来；总体上=generally speaking 相互矛盾的 宾语从句 表语从句 表语从句 同意；赞同 宾语从句 因此 时间状语从句 感染 结果状语从句 so+adj/adv+that如此..以至于.. 找出；查明 决心去做某事 one..the other一个..另一个 begin to do开始做某事 be contradictory to与..相矛盾 课堂•重难突破 课前•基础认知 Para 3 Snow began by marking on a map the exact places where all those who died had lived. There were multiple deaths near the water pump in Broad Street (especially hou