高中英语 Unit21 lesson3 epidemics explained课件 北师大版选修7 课件VIP免费

Unit 21 Human BiologyLesson 3 Epidemics ExplainedLook at the Key Words. Which of these diseases can be epidemic?AIDSCancerHeadacheFluHeart diseaseStomachacheTBEpidemics: Work in pairs. Do you think these statements are true(T) or false(F)?1.TB and flu kill millions of people every year.2.Most of diseases are very new.3.Epidemics have affected historical events.4.It takes years for a disease to spread world wide.5.Epidemics can wipe out up to half of the population in highly populated areas.6.More people died of a flu epidemic in 1918/1919 than died in World War I.Sequencing of in formation:1.read the text with gaps to get the general idea and see how it develops.2.Read the sentences before and after the gaps to give you an idea of what the beginning or end of the missing paragraph might refer to.3.Read the missing paragrapphs and look for these references.4.If a paragraph doesn’t seem to fit, you may have made a mistake, so carefully reread each paragraph. Now use the strategies to match the five paragraphs (A-E) with gaps 2,4,7,9 and 11 in the text.The answers:Paragraph AParagraph BParagraph CParagraph DParagraph EGap 2Gap 4Gap 7Gap 9Gap 11 Complete these sentences about the text in your own wordsHow did you feel after reading the article?Tell the classVoice your opinion:Language points1.epidemics explained 解释传染病 epidemics n. 流行 [ 传染 ] 病 , 时疫 . ( 风尚等的 ) 流行 ; ( 流行病的 ) 蔓延 adj. 传染 [ 流行性 ] 的 cholera epidemic 霍乱流行 mass epidemic 大流行 ; 集体流行Eg. Violence is reaching epidemic levels. 暴力达到了流行的程度。 2.epidemics throughout history 历史上的传染病病例 throughout prep. 遍及 , 贯穿 adv. 到处 , 始终 , 全部Eg. The road is kept open throughout the year. 这条路全年开通 ....