Unit 9 Lesson 3 Epidemics Explained 课件-2023-2024学年高中英语北师大版（2019）选择性必修第三册.pptx

新北师大版高中英语选择性必修三Unit9 Human BiologyLesson3 Epidemics Explained;COVID-19;SARS;Ebola Virus Disease;1. Describe epidemics using your own words. 2. Look at the above pictures and talk about the common points of epidemics.;What do you know about epidemics? Tick (√) the statements that you think are correct.;4. An epidemic may spread to several countries or continents. ( ) 5. Some common viruses, such as the common cold, are not epidemics. ( ) 6. A new epidemic can be a different variation of a virus that people caught in the past. ( );Fast-reading;Fast-reading;Intensive reading;Intensive reading;Intensive reading;;Intensive reading; Figure out the structure.; Discuss the questions.;1. What are the main features of an epidemic? Give at least two examples to illustrate your points.;2. What should different countries do to prevent outbreaks of epidemics in the future? Why?;3. What does the title mean to you? What does the writer want to convey in the passage?;4. Who do you think the passage is written for?;What do you think we can do to get ready for future epidemics?;①An epidemic is the name given to an infectious disease that rapidly spreads to a large number of people within a short period of time—usually two weeks or less. Epidemics have been happening for as long as there have been people living on Earth. They can be caused by several different ; factors, such as a virus being carried into an area, or changes in the way people live, like more people living in an area, which increases the chances of them coming into contact with a bacteria or virus. ;译文： 流行病(epidemic)是指在短时间内(通常两周或更短)迅速在大量人群中传播的传染性疾病。自地球上有人类生活以来，流行病就一直存在。它们会由不同因素(factor)引起，例如病毒(virus)被带入某个地区，或者由于人们生活方式的改变，比如说某一地区居住的人群增多，从而增加了接触病毒或细菌(bacteria)的几率。;②Each disease can only officially be classified as an epidemic once a certain number of deaths have occurred from the disease. The number of deaths is different for every disease. So a very rare disease will have a low