先有鸡还是先有蛋英语课件

Which comes first,chicken or 1An old philosophical questionA hot topic of discussionBiological evolution lawAn old philosophical questionA2A historical story诸葛亮周瑜Which comes first,chicken or egg?Egg firstIf there is no chicken,then the egg come from?If the first egg is hatching egg(种蛋），where the chicken come from?A historical story诸葛亮周瑜Which c3So in the end which comes first?Different people have different points of viewSo in the end which comes firs4Lets take a look at online votingLets take a look at online vo5Scientific discoveryScientific discovery6小型肉食恐龙蛋巢穴 Dinosaur nest like birds nestsDinosaur eggs are similar to bird eggs小型肉食恐龙蛋巢穴 Dinosaur nest like b7QuantityArrangementEach producing two eggs similar to birds恐龙蛋化石QuantityArrangementEach produc8Archaeopteryx（始祖鸟）Similar to dinosaurSimilar to birdArchaeopteryx（始祖鸟）Similar to d9Variation(变异）变异）eggLengthy processVariation(变异）eggLengthy proce10DirectlyAfter scientific research this is impossible.Simply stated：Variation is Non-directional（不定向的）DirectlyIs this possible?After11Conclusion：Egg firstDinosaur lay Variation egg then these variation egg slowly evolved into chickenConclusion：Egg firstDinosaur l12先有鸡还是先有蛋英语课件13Thank you!14