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1、Unit 21 Human Biology Lesson 3 Epidemics Explained Look at the Key Words. Which of these diseases can be epidemic? AIDS Cancer Headache Flu Heart disease Stomachache TB Epidemics: 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
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
3、 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 para
4、graph doesnt 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 A Paragraph B Paragraph C Paragraph D Paragraph E Gap 2 Gap 4 Gap 7 Gap 9 Gap 11 Complete
5、these sentences about the text in your own words How did you feel after reading the article? Tell the class Voice your opinion: Language points 1.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 epidemi
6、c 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. 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
7、, 考虑, 着眼于;回顾 5.Bacteria and viruses have been 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. 6.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 lo
8、ng as I am notified on time.只要及时告诉我，我就会合作. 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
9、去野营但被他们的父母们拦住了。 She made an attempt to cook the dinner.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 11.die from the disease (病以外)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。 12.be known as v.被认为是;以.知名; 被认为是; 称为
10、be known for 因.而著名 be known to 为.所知 13.a lack of （常与of连用）缺乏；需要 a lack of money 缺乏金钱 There is no lack of vegetable.蔬菜不缺。 14.provide the perfect conditions for provide for v.提供生活费; 养活; 为.作准备, 防备;规定 provide for old age防老 15.in highly populated areas 在人口密集的地区 16.one half to one third of the population w
11、as lost to the Black Death 有三分之一到一半的人死于黑死病. be lost to不再属于.所有;对.无动于衷 17.it is believed to be被认为是 18. die of the flu 死于, 因.而死 .die in the war 19.begin with 首先, end with 以.结束 Eg. Knowledge begin with practice.认识从实践开始。 to begin with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。
12、end up with 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。 The meeting ended up with the singing of The Internationale. 会议最后以唱国际歌而结束。 20.the number of 总数；总和 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。 当它前面是定冠词 the时，后跟单数动词. Eg. The number of skilled workers is small.熟练工人数较少
13、。 A number of the workers are unskilled.许多工人技术不熟练 21.such as adv.例如.,象这种的;诸如., 譬如说; 象.那样的; 如此.以致 Eg. such things as iron, silver, and gold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 23.be harmful to Eg. Smoking can be harmful to your health.吸烟对身体有害。 24.make up v.弥补, 虚构, 缝制, 整理, 包装,
14、 和解, 编辑, 化妆;补足,拼凑 Eg. She made up her face to look prettier. 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。 make up a bed整理床铺 25.expand across expand vt.使膨胀, 详述, 扩张 vi.张开, 发展 Eg. The bird expanded its wings and flew off.鸟展开翅膀飞走了 expand ones view阐述自己的观点 Match the words fro
15、m the passage(1-10)with their meanings(a-j) 1.Effects 2.Abnormal 2.Physician 4.Harmful 5.Staff 6.Aspect 7.Expand 8.Techniques 9.Accounts 10.acquire a)Doctor b)Bad c)Get d)Part e)Grow f)Results g)Results h)Unusual i)Ways j)workers Find the correct prepositions to complete each of these phrases from t
16、he text 1.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 the first World War and continued the war(para 6) Answers: 1.of,on 2.of,from 3.of,of,of 4.near,of,after Work in pairs. Which of these things do you think will happen within the next 25 years? 1.New drugs will
