北师大版 (2019)选择性必修 第三册Lesson 3 Epidemics Explained教课ppt课件

这是一份北师大版 (2019)选择性必修 第三册Lesson 3 Epidemics Explained教课ppt课件，共30页。PPT课件主要包含了传染病流行病，virus，variation，factor，officially，classify，rare，baseline，opposed，widespread等内容，欢迎下载使用。

UNIT 9 HUMAN BIOLOGY
Sectin ⅣLessn3 Epidemics Explained
*epidemic n. ____________________________________ n.病毒_______________ n.变化物，变体；差异，变动_______________ n.因素，要素*bacteria n. _____________________________________ adv. 官方地，正式地_______________ vt. 将…分类；把……归入一类
_______________ adj. 稀有的，罕见的，不常发生的_______________ n. (医学或科学中的) 基线，准线_______________ adj.与某事物相反；反对某事物，不赞成某事物_______________ adj.分布广的，广泛流传的classificatin n. ____________________________*______________ n. (不同地点或不同时间的两事物之间的)联系，相似 adj. 平行的
_________________ adj.令人沮丧的，让人忧愁的_________________ n.样本，样品 vt. 品尝，尝试；对……做抽样调查CE _______________________________________ vt.估计，估算_________________ adj. 看得见的*symptm n. _________________________________________ vt. 埋葬，安葬；埋藏
_____________ vt. 造成，引起，产生 (问题、危险、困难等) n. (为画像、拍照等而摆的) 姿势，姿态lung n. ___________________*steadily adv. _________________________________ n. (战争或疾病) 爆发，突然发生______________ n.试验；审判，审理______________ adj.实际的，真实的
________________ vt. 强调，使突出；在……之下画线________________ adj. 彻底的，全面的，详尽的________________ adj. 系统化的，有条理的________________ n. 地球，世界；地球仪
EPIDEMICS EXPLAINED
ACTIVATE AND SHARE 激活并分享
□ An epidemic is the rapid spread f an infectius disease.□ An epidemic can affect a large number f peple in a given ppulatin.□ An epidemic can ccur within a shrt perid f time，usually tw weeks r less.□ An epidemic may spread t several cuntries r cntinents.□ Sme cmmn viruses，such as the cmmn cld，are nt epidemics.□ A new epidemic can be a different variatin f a virus that peple caught in the past.
READ AND EXPLORE 阅读和探索
An epidemic is the name given t an infectius disease that rapidly spreads t a large number f peple within a shrt perid f time -usually tw weeks r less. Epidemics have been happening fr as lng as there have been peple living n Earth.
They can be caused by several different factrs，such as a virus being carried int an area，r changes in the way peple live，like mre peple living in an area，which increases the chances f them cming int cntact with a virus r bacteria.
Each disease can nly fficially be classified as an epidemic nce a certain number f deaths have ccurred frm the disease. The number f deaths is different fr every disease. S a very rare disease will have a lw baseline and just a few cases f it in ne place will be classified as an epidemic；as ppsed t mre cmmn diseases，such as the flu，that have a higher baseline. The cmmn cld is a widespread virus that affects millins f peple，but it is nt seen as being a serius enugh cnditin t deserve the classificatin f an epidemic.
adv. 官方地，正式地
adj. 稀有的，罕见的，不常发生的
n. (医学或科学中的) 基线，准线
adj.与某事物相反；反对某事物，不赞成某事物
adj. 分布广的，广泛流传的
n. 归类，分类，分级
With recent press reprts drawing parallels between bird flu and killer epidemics f the past，Jim Smith lks at the smetimes depressing histry f epidemics fr clues abut hw we can create a mre psitive future withut epidemics.
Since bird flu first appeared in 1997，it has taken mre than a hundred lives. Many peple fear it culd be the next glbal epidemic，especially as scientists wh have gne int detail studying tissue samples frm the bdies f peple wh died f the 1918 Spanish Flu have prved that bird flu is a mdern adaptatin f that virus.
n.(不同地点或不同时间的两事物之间的)联系，相似 adj. 平行的
adj.令人沮丧的，让人忧愁的
n.样本，样品 vt. 品尝，尝试；对……做抽样调查
One f the earliest epidemics n recrd happened between abut 500 and 550 CE. Scientists nw estimate that up t 50% f the area′s ppulatin died frm the epidemic，making it ne f the main causes f the fall f the Rman Empire. Then，in the 1330s，this epidemic returned this time in Asia. It spread rapidly t Eurpe and became knwn as “The Black Death” because ne visible symptm was black spts n the bdy.
Centuries later，the Great Flu Epidemic f 1918，als called the Spanish Flu， struck near the end f Wrld War I. Families wh had nly just gt thrugh the war nw had t bury their lved nes wh had died f the disease. As a result f the war，mre peple were travelling and mving perhaps than ever befre in histry and this caused the epidemic t spread wrldwide. Having killed up t 50 millin peple in 18 mnths，the Spanish Flu is believed t have been the mst severe epidemic in histry. Mre peple died f the flu than died in the war. Initially，many peple believed that such epidemics n lnger psed a threat until very recently when SARS became a cause fr cncern.
vt. 埋葬，安葬；埋藏
vt. 造成，引起，产生 (问题、危险、困难等) n. (为画像、拍照等而摆的) 姿势，姿态
The SARS epidemic began in 2002 with a case f lung disease in Guangdng Prvince. It spread t Canada，Vietnam and Singapre and lasted until 2003. SARS was examined by scientists，wh were cnfused by this new disease and wanted t learn mre abut it and its causes. Infectin rates went up steadily，and in the curse f the utbreak，abut 8,000 peple were infected ver nine mnths. Since the end f the SARS epidemic，scientists have been ding trials n treatments t prevent any future utbreaks.
n. (战争或疾病) 爆发，突然发生
Then，frm 2013 t 2016，there was the mst widespread utbreak f the Ebla Virus Disease (EVD) in West Africa，which resulted in a majr lss f life in a number f west African cuntries. 11.310 deaths were fficially recrded，but the actual number f deaths is prbably much higher. The virus was extremely infectius and the survival rate was as lw as 30% in sme areas，indicating that very few peple gt ver it.
adj. 实际的，真实的
Despite，r perhaps because f，the epidemics the wrld has faced in recent years，gvernments wrldwide have underlined the fact that they want thrugh and systematic medical research n epidemics t get at the causes and cme up with cures as sn as pssible. Cuntries will need t wrk tgether t d this because teamwrk amng natins acrss the glbe can save lives.
vt. 强调，使突出；在……之下画线
adj. 彻底的，全面的，详尽的
adj.系统化的，有条理的
n. 地球，世界；地球仪
mre than a hundred lives
the Rman Empire
half f the ppulatin
Asia and Eurpe
50 millin peple
China，Canada，Vietnam and Singapre
West Africa
mre than 11,310 deaths
1 What are the main features f an epidemic? Give at least tw examples t illustrate yur pints.
2 What shuld different cuntries d t prevent utbreaks f epidemics in the future? Why?3 What des the title mean t yu? What des the writer want t cnvey in the passage?4 Wh d yu think the passage is written fr?
1 Epidemics can be caused by Diseases can nly be fficially classified as epidemics when The Spanish Flu spread wrldwide because …4 Since the end f the SARS epidemic. scientists …5 Cuntries need t wrk tgether t cnduct thrugh and systematic research because …
FOCUS ON LANGUAGE：PHRASAL VERBS (2) 关注语言: 短语动词 (2)
at，int，ver，thrugh，under，up，away
at，int，ver，thrugh，up，away
at，int，ver，up with，thrugh，under，up，away
1 The medical expert asked a few questins t try t ___________ the truth.2 Bks n epidemics ______________ the medicine sectin f the stre.3 During this curse，we′ll ____________ the main causes f bird flu.4 It tk him a week t ___________ the flu.5 Has yur headache _____________ yet?6 The price f this drug has ___________ twenty cents since August.7 Are yu willing t stand by him and help him __________ this difficult time? 8 Jrdan has ______________ sme creative ideas fr helping the sick.
get thrugh
cme up with