高中英语 Unit21 lesson3 epidemics explained课件 北师大选修7.ppt

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1、Unit 21 Human BiologyLesson 3 Epidemics Explained2021/8/11 星期三1words2021/8/11 星期三2exercise 1exercise 1Look at the Key Words.Which of these diseases can be epidemic?2021/8/11 星期三3AIDSCancerHeadacheFluHeart diseaseStomachacheTBEpidemics:2021/8/11 星期三4exercise 2exercise 2 Work in pairs.Do you think the

2、se statements are true(T)or false(F)?2021/8/11 星期三51.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

3、 areas.6.More people died of a flu epidemic in 1918/1919 than died in World War I.2021/8/11 星期三6reading strategies:reading strategies:2021/8/11 星期三7Sequencing 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 g

4、ive 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 doesnt seem to fit,you may have made a mistake,so carefully reread each paragraph.2021/8/11 星期三8exercise 3exercise 3 Now use the strategi

5、es to match the five paragraphs(A-E)with gaps 2,4,7,9 and 11 in the text.2021/8/11 星期三9The answers:Paragraph AParagraph BParagraph CParagraph DParagraph EGap 2Gap 4Gap 7Gap 9Gap 112021/8/11 星期三10exercise 4exercise 4 Complete these sentences about the text in your own words2021/8/11 星期三11exercise 5ex

6、ercise 5How did you feel after reading the article?Tell the classVoice your opinion:2021/8/11 星期三12Language points2021/8/11 星期三131.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

7、.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.3.with new health threats on the rise.对人类健康造成威胁的因素在不断增加。rise n.上升,增加,上涨,高地,小山,发生,出现 vi.升起,起身,发源,起义,高耸,增长,上升,复活 vt.使飞起 4.look at v.看,考虑,着眼于;回顾5.Bacteria and viruses have been

8、around since the beginning of life on earth自从地球上有了生命,便有了各种细菌和病毒.2021/8/11 星期三146.as long as只要,在.的时候;既然;以为条件Eg.You may borrow this book as long as you promise to give it back.只要你答应归还，你就可以把这书借走。As long as youve offered,I accept.既然你已给我，我就接受.I will cooperate as long as I am notified on time.只要及时告诉我，我就会合

9、作.7.as early as 430 BC早在公元前430年 as early as早在8.on record adv.记录在案,公开宣布的;记录下来的Eg.the coldest winter on record有记录以来最冷的冬天9.attempt to do sth.attempt n.努力,尝试,企图 vt.尝试,企图Eg.The boys attempted to leave for camping but were stopped by their parents.男孩子们想去野营但被他们的父母们拦住了。She made an attempt to cook the dinner

10、.她试着做这顿饭。10.sweep through sweep v.扫,打扫,清扫,席卷,冲光,扫过,掠过Eg.The wind swept over the plain.疾风横扫平原2021/8/11 星期三1511.die from the disease (病以外病以外)因某事而死因某事而死Eg.Every winter some old people die from hypothermia.每年冬天都有些老人死于体温过低。每年冬天都有些老人死于体温过低。12.be known as v.被认为是被认为是;以以.知名知名;被认为是被认为是;称为称为 be known for 因因.而著

11、名而著名 be known to 为为.所知所知13.a lack of（常与（常与of连用）缺乏；需要连用）缺乏；需要 a lack of money 缺乏金钱缺乏金钱 There is no lack of vegetable.蔬菜不缺。蔬菜不缺。14.provide the perfect conditions for.provide for v.提供生活费提供生活费;养活养活;为为.作准备作准备,防备防备;规定规定 provide for old age防老防老15.in highly populated areas 在人口密集的地区在人口密集的地区2021/8/11 星期三1616.

12、one half to one third of the population was lost to the Black Death 有三分之一到一半的人死于黑死病有三分之一到一半的人死于黑死病.be lost to不再属于不再属于.所有所有;对对.无动于衷无动于衷17.it is believed to be被认为是被认为是18.die of the flu 死于死于,因因.而死而死 .die in the war19.begin with 首先首先,end with 以以.结束结束Eg.Knowledge begin with practice.认识从实践开始。认识从实践开始。to be

13、gin with首先；第一点（理由）首先；第一点（理由）Eg.We cant go.To begin with,its too cold.我们不能去。首先，天太冷了。我们不能去。首先，天太冷了。end up with 以告终以告终Eg.He ended his letter off with good wishes to his friend.他给朋友的信以祝好这句话结束。他给朋友的信以祝好这句话结束。The meeting ended up with the singing of The Internationale.会议最后以唱会议最后以唱国际歌国际歌而结束。而结束。20.the numb

14、er of 总数；总和总数；总和 作为一个集合名词，作为一个集合名词，number既可以跟动词单数形式也可以跟动词复数形式。既可以跟动词单数形式也可以跟动词复数形式。当它前面是定冠词当它前面是定冠词 the时，后跟单数动词时，后跟单数动词.Eg.The number of skilled workers is small.熟练工人数较少。熟练工人数较少。A number of the workers are unskilled.许多工人技术不熟练许多工人技术不熟练2021/8/11 星期三1721.such as adv.例如例如.,象这种的象这种的;诸如诸如.,譬如说譬如说;象象.那样的那样

15、的;如此如此.以致以致Eg.such things as iron,silver,and gold铁、银和金这一类东西铁、银和金这一类东西22.natural defences against the disease 对抗这种病的自然抗体对抗这种病的自然抗体23.be harmful toEg.Smoking can be harmful to your health.吸烟对身体有害。吸烟对身体有害。24.make up v.弥补弥补,虚构虚构,缝制缝制,整理整理,包装包装,和解和解,编辑编辑,化妆化妆;补足补足,拼凑拼凑Eg.She made up her face to look pret

16、tier.她把脸化了妆以便看上去漂亮些。她把脸化了妆以便看上去漂亮些。The boy made up a story;it was not true.男孩编了个故事，这故事不是真的。男孩编了个故事，这故事不是真的。make up a bed整理床铺整理床铺25.expand across expand vt.使膨胀使膨胀,详述详述,扩张扩张 vi.张开张开,发展发展Eg.The bird expanded its wings and flew off.鸟展开翅膀飞走了鸟展开翅膀飞走了 expand ones view阐述自己的观点阐述自己的观点2021/8/11 星期三18vocabulary

17、:vocabulary:synonymssynonyms2021/8/11 星期三19exercise 6exercise 6 Match the words from the passage(1-10)with their meanings(a-j)2021/8/11 星期三201.Effects2.Abnormal2.Physician4.Harmful5.Staff6.Aspect7.Expand8.Techniques9.Accounts10.acquirea)Doctorb)Badc)Getd)Parte)Growf)Resultsg)Resultsh)Unusuali)Waysj)

18、workers2021/8/11 星期三21exercise 7exercise 7 Find the correct prepositions to complete each of these phrases from the text2021/8/11 星期三221.the beginning life Earth(para.1)2.25%and 50%the areas population died the disease(para 3)3.was one the key causes the fall the Roman Empire(pare 3)4.struck the end

19、 the first World War and continued the war.(para 6)Answers:1.of,on2.of,from3.of,of,of4.near,of,after2021/8/11 星期三23speaking 2021/8/11 星期三24exercise 82021/8/11 星期三25Work in pairs.Which of these things do you think will happen within the next 25 years?1.New drugs will stop all diseases.2.Doctors will find a cure for SARS.3.Flu will disappear.4.AIDS will cause large epidemics.2021/8/11 星期三26copy the new words 2021/8/11 星期三27Thank you!2021/8/11 星期三28Byebye！别忘了记单词啊！2021/8/11 星期三292021/8/11 星期三30