Unit 1 Reading and Thinking 课件-2022-2023学年高中英语人教版（2019）选择性必修第二册

Science and scientists 1 Tu Youyou Yuan Longping John Snow malaria shortage of food cholera 导入环节，问学生我们高中阶段有接触过哪些和科学相关的人物。展示屠呦呦defeats疟疾，袁隆平defeats食物短缺。引出John，问学生了解他么？看标题知道，他defeats 霍乱。 2 John Snow Defeats “King Cholera” What will be talked about in the text？ Read the text and find the answers. 要求学生观察示意图，根据提示，先去解读。再根据标题，两个插图，预测文本内容，把学生的问题，按照文本段落的顺序写在黑板上。 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 early 19th 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. John Snow, a famous British doctor, desired to destroy cholera. defeats severe, “king” How? serious consequences a great number unknown 1. 学生在回答第一段有关John Snow 问题的时候，把页面显示出来。根据学生的回答，把相应信息划出来，要求学生根据已划信息，用简洁的话语介绍John Snow。2. 如1， 把霍乱相关信息划出来，让学生掌握这个疾病的基础信息，要求学生用段落中的一个词去概括对它的初印象；如果学生在提问阶段有注意到标题中的King，通过上面也理解了，如果学生没有找到，教师可以要求学生回到标题，关注这个词。3. 接着引出全文最重要的，即如何打败疟疾的研究过程。直接让学生去概括，去回答有点难，这时给出七个混乱的研究步骤，要求学生根据第二段的内容选出此段涉及的步骤。 4 In general, doctors in those days had two contradictory theories to explain how cholera spread. One theory was that bad air caused the disease. Another 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. find a problem ask a question seven steps: analyze the results,