1. Unit 1 Great scientists- 教材背景 高二必修 5

2. Unit 1 Great scientists 教材背景链接名言佳句 Everything reasons logically and must get from the observation and experiment. —Galileo ， Italy physicist 一切推理都必须从观察与实验得来。 —— 意大利物理学家 伽利略 Sometimes one pays most for the things one gets for nothing. —Albert Einstein ， American scientist

3. 有时候一个人为不花钱得到的东西付出的代价最高。 —— 美国科学家 爱因斯坦 ·A Genius only means hard  working all one’s life. —Mendeleyer ， Russian Chemist 天才只意味着终身不懈的努力。 —— 俄国化学家 门捷列耶夫

4. John Snow John Snow was born on March 15,1813 ， in the city of York ， England. As a boy he proved to be a bright student ， so his mother sent him to a private school ， where he excelled.类文欣赏

5. Snow planned to become a physician ， and at fourteen ， he was apprenticed( 使某人当学徒 )to Dr.William Hardcastle in Newcastle-upon-Tyne.Snow had an analytical mind that paid attention to details that others often ignored. During his early years as an apprentice ， he filled notebooks with his thoughts and observations on scientific subjects.

6. During the London cholera epidemic( 流行霍乱 )of 1831 ～ 1832 ， he became a student at the School of Medicine in Great Windmill Street ， London. After two years of schooling ， he was accepted as a member of the Royal College of Surgeons of England. Snow was a believer in the germ theory of cholera. In 1849 Snow wrote a book “ On the Mode of Communication of Cholera ， ” in which he suggested that the “cholera poison” was spread( 传播 )through the pollution of food or water. This theory should be against the more commonly accepted idea that cholera ， like all diseases ， multiplied in the air ， and a cloud of dangerous gas floated around until it found its victims.

7. On April 7,1853 ， he used chloroform( 三氯甲烷，旧时医用 麻醉剂 )to Queen Victoria at the birth of her eighth child ， Prince Leopold. And it wasn’t until 1854 ， when cholera struck England once again ， that Snow’s argument that cholera was spread through polluted food or water was recognized. For his efforts to determine how cholera was spread and for the statistical mapping methods he used ， John Snow is widely considered to be the father of modern epidemiology.

8. Read the passage and tell the following statements true(T)or false(F) ． 1 ． As a boy ， John Snow filled notebooks with his thoughts and observations on scientific subjects.( ) 2 ． John Snow believed that the “cholera poison” was spread through the pollution of food or water.( ) 3 ． Snow’s argument that cholera was spread through polluted food or water was recognized when it was put forward.( ) Keys ： 1.F 2.T 3.F

9. 祝同学们学习愉快！