以我最喜欢的恐龙写一篇英语作文40个字
问题描述：
以我最喜欢的恐龙写一篇英语作文40个字
答
About 255 million years ago,the planet emergence of a new class of reptiles.Like all reptiles,they are the descendants of the eggs hatching out of their skin covered with scales,impervious,and this is...