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ISBN: 9787573108944
File size: 33834 KB

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by 英童书坊编纂中心

ebook

白垩纪是中生代的最后一个纪，约开始于1.4亿年前，结束于6 500万年前，长达8 000万年。在这一时期恐龙家族从繁荣昌盛走向衰落，直到白垩纪晚期，不明原因导致了恐龙家族的彻底灭亡。本书主要介绍白垩纪早期的一些恐龙，例如豪勇龙、牛角龙、戟龙、棱齿龙、禽龙等。