高中英語 Unit21 lesson3 《Epidemics Explained》課件 北師大版選修7

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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 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.,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 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.,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 A Paragraph B Paragraph C Paragraph D Paragraph E,Gap 2 Gap 4 Gap 7 Gap 9 Gap 11,,,,,,exercise 4,,Complete these sentences about the text in your own words,exercise 5,How did you feel after reading the article? Tell the class,Voice your opinion:,Language points,1.epidemics explained解釋傳染病 epidemics n.流行[傳染]病, 時疫. (風(fēng)尚等的)流行; (流行病的)蔓延 adj.傳染[流行性]的 cholera epidemic霍亂流行 mass epidemic大流行; 集體流行 Eg. Violence is reaching epidemic levels.暴力達(dá)到了流行的程度。 2.epidemics throughout history歷史上的傳染病病例 throughout prep.遍及, 貫穿 adv.到處, 始終, 全部 Eg. The road is kept open throughout the year.這條路全年開通. 3.with new health threats on the rise. 對人類健康造成威脅的因素在不斷增加。 rise n.上升, 增加, 上漲, 高地, 小山, 發(fā)生, 出現(xiàn) vi.升起, 起身, 發(fā)源, 起義, 高聳, 增長, 上升, 復(fù)活 vt.使飛起 4.look at v.看, 考慮, 著眼于;回顧 5.Bacteria and viruses have been around since the beginning of life on earth 自從地球上有了生命,便有了各種細(xì)菌和病毒.,6.as long as只要, 在.的時候;既然;以…為條件 Eg. You may borrow this book as long as you promise to give it back. 只要你答應(yīng)歸還，你就可以把這書借走。 As long as you've offered, I accept.既然你已給我，我就接受. I will cooperate as long as I am notified on time.只要及時告訴我，我就會合作. 7.as early as 430 BC早在公元前430年 as early as早在 8.on record adv.記錄在案, 公開宣布的;記錄下來的 Eg. the coldest winter on record有記錄以來最冷的冬天 9.attempt to do sth. attempt n.努力, 嘗試, 企圖 vt.嘗試, 企圖 Eg. The boys attempted to leave for camping but were stopped by their parents. 男孩子們想去野營但被他們的父母們攔住了。 She made an attempt to cook the dinner.她試著做這頓飯。 10.sweep through sweep v.掃, 打掃, 清掃, 席卷, 沖光, 掃過, 掠過 Eg. The wind swept over the plain.疾風(fēng)橫掃平原,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體溫過低。 12.be known as v.被認(rèn)為是;以.知名; 被認(rèn)為是; 稱為 be known for 因.而著名 be known to 為.所知 13.a lack of （常與of連用）缺乏；需要 a lack of money 缺乏金錢 There is no lack of vegetable.蔬菜不缺。 14.provide the perfect conditions for provide for v.提供生活費(fèi); 養(yǎng)活; 為.作準(zhǔn)備, 防備;規(guī)定 provide for old age防老 15.in highly populated areas… 在人口密集的地區(qū),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不再屬于.所有;對.無動于衷 17.it is believed to be…被認(rèn)為是… 18. die of the flu 死于, 因.而死 .die in the war 19.begin with 首先, end with 以.結(jié)束 Eg. Knowledge begin with practice.認(rèn)識從實(shí)踐開始。 to begin with首先；第一點(diǎn)（理由） Eg. We can't go. To begin with, it's too cold. 我們不能去。首先，天太冷了。 end up with 以告終 Eg. He ended his letter off with good wishes to his friend. 他給朋友的信以祝好這句話結(jié)束。 The meeting ended up with the singing of The Internationale. 會議最后以唱《國際歌》而結(jié)束。 20.the number of 總數(shù)；總和 作為一個集合名詞， number既可以跟動詞單數(shù)形式也可以跟動詞復(fù)數(shù)形式。 當(dāng)它前面是定冠詞 the時，后跟單數(shù)動詞. Eg. The number of skilled workers is small.熟練工人數(shù)較少。 A number of the workers are unskilled.許多工人技術(shù)不熟練,21.such as adv.例如.,象這種的;諸如., 譬如說; 象.那樣的; 如此.以致 Eg. such things as iron, silver, and gold鐵、銀和金這一類東西 22.natural defences against the disease 對抗這種病的自然抗體 23.be harmful to Eg. Smoking can be harmful to your health.吸煙對身體有害。 24.make up v.彌補(bǔ), 虛構(gòu), 縫制, 整理, 包裝, 和解, 編輯, 化妝;補(bǔ)足,拼湊 Eg. She made up her face to look prettier. 她把臉化了妝以便看上去漂亮些。 The boy made up a story; it was not true. 男孩編了個故事，這故事不是真的。 make up a bed整理床鋪 25.expand across expand vt.使膨脹, 詳述, 擴(kuò)張 vi.張開, 發(fā)展 Eg. The bird expanded its wings and flew off.鳥展開翅膀飛走了 expand one's view闡述自己的觀點(diǎn),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 area’s 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,speaking,exercise 8,Work 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.,HOMEWORK,,copy the new words,Thank you!,,Byebye！,別忘了記單詞啊！,同學(xué)們,來學(xué)校和回家的路上要注意安全,同學(xué)們,來學(xué)校和回家的路上要注意安全,