资源描述：
《说明文段落的理解.ppt》由会员上传分享，免费在线阅读，更多相关内容在行业资料-天天文库。
1、段落理解---说明文高三复习TeachingObjectives通过阅读说明文段落，总结并掌握说明文段落主旨的概括方法；理清段落信息之间的逻辑关系，画出段落结构图；Hollywood’stheorythatmachineswithevil(邪恶)mindswilldrivearmiesofkillerrobotsisjustsilly.Therealproblemrelatestothepossibilitythatartificialintelligence(AI)maybecomeextremely
2、goodatachievingsomethingotherthanwhatwereallywant.In1960awell-knownmathematicianNorbertWiener,whofoundedthefieldofcybernetics（控制论）,putitthisway:“Ifweuse,toachieveourpurposes,amechanicalagencywithwhoseoperationwecannoteffectivelyinterfere(干预),wehadbetterb
3、equitesurethatthepurposewhichwereallydesire.”Leadin阅读下面文段，简单说出说明文的语篇特点。说明文主要是对事物或事理进行客观说明的一种文体。说明文结构句式复杂，专业术语多，抽象度高。但同时说明文中心鲜明突出、文章逻辑性和条理性比较强。因此要掌握说明文的说明方法、以积极，冷静的心态面对。Howtogetthemainideaofaparagraphinexpositorytexts?Activity1:阅读下列3个段落并1）找出段落的核心句；2）归纳核心句
4、可能出现的位置；3）归纳核心句的语言特点。ResearchersinSpainandEnglandrecentlyfoundthatthewormsofthegreaterwaxmoth(大蜡螟)canbreakdownpolyethylene,whichaccountsfor40%ofplastics.Theteamleft100waxwormsonacommercialpolyethyleneshoppingbagfor12hours,andthewormsconsumedandbrokedowna
5、bout92milligrams,oralmost3%ofit.Toconfirmthattheworms'chewingalonewasnotresponsibleforthepolyethylenebreakdown,theresearchersmadesomewormsintopaste(糊状物)andappliedittoplasticfilms.14hourslaterthefilmshadlost13%oftheirmass--apparentlybrokendownbyenzymes(酶)
6、fromtheworms'stomachs.TheirfindingswerepublishedinCurrentBiologyin2017.ResearchersinSpainandEnglandrecentlyfoundthatthewormsofthegreaterwaxmoth(大蜡螟)canbreakdownpolyethylene,whichaccountsfor40%ofplastics.段首Measles(麻疹),whichoncekilled450childreneachyearand
7、disabledevenmore,wasnearlywipedoutintheUnitedStates14yearsagobytheuniversaluseoftheMMRvaccine(疫苗).Butthediseaseismakingacomeback,causedbyagrowinganti-vaccinemovementandmisinformationthatisspreadingquickly.Alreadythisyear,115measlescaseshavebeenreportedin
8、theUSA,comparedwith189foralloflastyear.段中MMRvaccine(疫苗).Butthediseaseismakingacomeback,causedbyagrowinganti-vaccinemovementandmisinformationthatisspreadingquickly.Whywouldhumanbeingswasteathirdoftheirlivessleepingwhentheyc
