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1、,成型191410邢玉薪,Englishclasspresentation,Thisisastoryaboutviruses,WhyamIathome?WhydontIgotoschool?WhydoIuseacomputerandamicrophoneformypresentation?,Thisstorybeginswith,Abat!,Thenovelcoronavirushasaffectedhumanlife.Weallhopetheydisappearsoon.Butviruseshaveneverdisappearedfromhumanhistory.,Itisnotexagge
2、ratedtosaythatthehistoryofhumanisthehistoryofthestruggleagainstviruses.,PS,PS,SpeakingofEbola,manypeoplethinkheisscaryandassociateitwithzombies,Itisindeedverydangerous,itsbiosafetylevelis4.AndAIDSisLevel2andSARSisLevel3.,biosafetylevel(BSL)生物安全等级,Level2,Level3,Ebolavirusfirstemergedin1976inoutbreaks
3、ofEbolahemorrhagicfeverinZaireandSudan.,埃博拉病毒最早于1976年在扎伊尔和苏丹地区爆发埃博拉出血热时被发现。,ThestrainofEbolathatbrokeoutinZairehasoneofthehighestcasefatalityratesofanyhumanvirus,roughly90%.,扎伊尔型埃博拉病毒的致死率高达90%，是致死率最高的几种人类病毒之一。,Symptomsincludevomitinganddiarrhea(腹泻),fever,weakness,headacheandsorethroat.,Finally,manyo
4、rgansturnintoblood.,Ifyouwanttoknowmoreabouthim,YoucanwatchTheHotZone.（血疫）,Anddontforget,BlackDeath,Plague,黑死病的名字来源于患者由于皮肤和组织的损坏全身遍布黑色斑.,Thisnamecomesfrompatientswithblackspotsalloverthebodyduetoskinandtissuedamage.,IfEbolaisthesickle(镰刀)ofthedeath,thentheBlackDeathisthedeathitself.,Itkilled25millio
5、nEuropeans,accountingforone-thirdoftheEuropeanpopulationatthetime.,它夺走了2500万欧洲人的性命，占当时欧洲总人口的1/3。,在20世纪，这堪称人类史上最为惨烈的第二次世界大战，欧洲因战争而死去的总人数仅为其人口的5%。,Inthetwentiethcentury,itwascalledtheworstWorldWarIIinhumanhistory,thetotalnumberofpeoplewhodiedinEuropeduetowarwasonly5%ofitspopulation.,Theirfacesarehidde
6、ninabirdsbeakmask,whichisfilledwithcottonandotherfillersforprotection.,Theyhavealongstickintheirhandstotouchpatients.,Smallpox,Smallpox,Haveyoueverhadchickenpox?,Littlesurvey:,Smallpoxisoneoftheoldestinfectiousdiseasesrecordedbyhumanbeings.Wecaninferthatsmallpoxhasbeenragingforatleast3,000yearsinhum
7、anhistory.,天花是人类有记载的最古老的传染病之一。可以推断，天花至少在人类历史上肆虐了3000多年。,However,suchaterriblediseasewascompletelyextinctinMay1980,becomingtheonlyinfectiousdiseasetobecompletelyeradicatedbyhumanssofat.,然而，这么一个可怕的病魔，却在1980年5月被宣告彻底消灭，成为迄今为止人类唯一彻底消灭的传染病。,vaccine,Thevirusisanunsolvedmystery.Wedontknowwhereitcamefromorhowtodealwithit.Itislikeavine(藤蔓)onthetreeofevolution,keepingbreeding.Butourhumanstrugglewillnotstop.,Wearamask,washyourhandsfrequentlyandgatherless.,Mostimportantly,refusetoeatwildanimals.,Thevictorybelongstous!,Thanks,Tomorrowwillbebetter.,