关于恐龙的英文介绍PPT演示.pptx

dinosaurHello,everybody,Iˊmverygladtostandheretotalksomethingwithyou,thentodayIˊdliketosharemytopicaboutdinosaurs……dinosaurAsyoucansee,thedinosaursintrouducednowisrealdinosaurs,notlikethis……O__O”…WhatisaDinosaur?Dinosaursareaclassofanimalswhichlivedabout6500millionyearsago,anditcansupportthebodyupright,-birds,、能支撑身体直立行走的的一类动物,支配全球陆地生态系统超过1亿年。大部分恐龙已经灭绝,但是恐龙的后代——鸟类存活下来,并繁衍至今。Asisknowntousall,therearevarietiesofdinosaurslonglongagosuchasCarnivorousdinosaur,,dome-,它们有很细的,圆顶形的头骨,科学家认为它们有可能是用它们细小的头部去顶撞其他恐龙的。,alargestegosaur,-(9meters),而且它们的背上有一排骨板,剑龙,大的剑龙,在它的尾巴上有那种板钉状的东西,它经常用它那带有板钉的尾巴去和兽脚亚目食肉恐龙战斗,剑龙是大约30英尺(9米)长。,theabsenceofteeth,atallmandible,alongpa-rietal,anenlargedtooth-likeprocessonthepalate,andalarge,anteriorlylocatedexternalman-dibularfenestra偷蛋龙是一种兽脚亚目食肉恐龙,它的头部和下颚骨都是改进过的,偷蛋龙的特点就是有很短的吻部,缺损的牙齿,壮实的下颚骨,还有一个长长的顶和一个扩充的像牙齿一样的东西,一个大的,前面的位于下颌外部的孔TheextinctionofdinosaursThoughtdinosaursonceweretheoverlordoftheword,,,themostauthoritativeview,,therewasa7-10kmindiameterasteroidwillfallontheearth'ssurface,causingalargeexplosion,suchasthrowingalotofdustintheatmospheretoformtheZhetianbiriHouseofSandandFog,ledtothesuspensionofplantphotosynthesis,Andthereforeth