In 200 million years ago,a large number of Mesozoic reptile living on the land,so the Mesozoic is also called "reptiles age",the earth was first vertebrate widely held.Then the earth's climate warm,ev...
恐龙灭绝的原因 上面要中文 下面写英文
In 200 million years ago,a large number of Mesozoic reptile living on the land,so the Mesozoic is also called "reptiles age",the earth was first vertebrate widely held.Then the earth's climate warm,ev...