Unit 21 Human Biology,Lesson 3 Epidemics Explained,words,exercise 1,Look at the Key Words. Which of these diseases can be epidemic?,AIDS Cancer Headache Flu Heart disease Stomachache TB,Epidemics:,exercise 2,Work in pairs. Do you think these statements aretrue(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.,reading strategies:,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 togive you an idea of what the beginning or end of the missing paragraph might refer to. 3.Read the missing paragrapphs and look forthese references. 4.If a paragraph doesnt seem to fit, you may have made a mistake, so carefully reread eachparagraph.,exercise 3,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 E,Gap 2Gap 4Gap 7Gap 9Gap 11,exercise 4,Complete these sentences about the textin your own words,exercise 5,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 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.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 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 long 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 throughsweep 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 forprovide 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 was 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 war19.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。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。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, 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 acrossexpand 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,vocabulary: synonyms,exercise 6,Match the words from 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,exercise 7,Find the correct prepositions to complete each of these phrases from the 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),