高中英语 Unit 4 第一学时 Reading and Comprehension课件 新人教版必修3.ppt

英语 必修3 人教版 第一学时readingandcomprehension task1 快速阅读课文 howlifebeganontheearth 以约30词写出文章的段落大意 温馨提示 本文是科普文 属于说明文的范畴 写摘要时要抓住文章要说明的主要问题 地球上生命起源的几个主要阶段 语篇理解 语篇理解 答案 thepassageexplainshowlifebeganontheearth aftertheearthexplodedandproducedwaterwhosecontinuedpresencemadeitpossibleforlifetodevelop plantsandanimalsincludinghumanbeingsappearedontheearth task2 语篇理解 根据课文 howlifebeganontheearth 选择正确答案 1 fromparagraph1wecanknowthatstarsarecreatedfrom a airb atomsc rocksd ice b 2 whatdoestheword they refertointhesentences itexplodedloudlywithfireandrock theywereintimetoproducecarbon nitrogen watervapourand inparagraph2 a planets b stars c gases d fireandrock 语篇理解 d 3 whichistherightorderofthedevelopmentoflife a smallcleveranimals shellfish dinosaurs mammals b shellfish dinosaurs smallcleveranimals mammals 语篇理解 c c shellfish dinosaurs mammals smallcleveranimals d dinosaurs shellfish mammals smallcleveranimals 语篇理解 4 whyweremammalsdifferentfromotherlifeforms a theygavebirthtoyoungbabyanimalsandproducedmilktofeedthem b theyproducedyounggenerallybylayingeggs c theywereabletoliveonlandaswellasinthewater d theyliveongrass a 语篇理解 5 whatproblemiscausedbyhumanbeings a theyexisteverywhereontheearth b theycauseglobalwarming c theyfindnewmethodsofgrowingcrops d theyenjoyhuntingandfishing 语篇理解 b task3 语篇理解 insectsamphibiansreptilesdinosaursmammalsincluding3 water landanimals humanbeings task4 根据课文 howlifebeganontheearth 在下文空格中填上恰当的词语 使文章连贯完整 nooneknowsexactly1 theearthbegan accordingtoawidelyacceptedtheory theearthbeganwitha bigbang 2 explodedloudlyandproducedwatervapourandmanygases 3 make theearth satmosphere astheearthcooleddown waterappearedandstayed4 thesurface itwasthe how which making 语篇理解 on presenceofwater5 allowedtheearthtodissolveharmfulgasesandacidsintotheoceansandseas whichmade6 possibleforlifetodevelop first theappearanceofsmallplantsencouragedthedevelopmentofearlyshellfishandallsortsoffish next greenplantsbegantogrowonland 7 werefollowedbylandanimals soreptilesappearedforthefirsttime later dinosaursdeveloped 8 theysuddenlydisappeared afterthat mammalscameinto that it 语篇理解 they however being finally humansappearedandspreadallovertheearth however theyareputtingtoomuchcarbondioxideintotheatmosphere makin