通过研究这些化石,科 学家知道恐龙是当今鳄鱼、蛇和蜥蜴的古表亲。科学家还认为,今天的鸟类是 恐龙的后裔。 When and where dinosaurs lived? The study of the history and physical features of Earth is called geology 地质学. ......
Dinosaur(恐龙) The introduction of the Dinosaurs Dinosaurs lived for over 160 million years, first appearing about 230 million years ago. To many childr Dinosaur(恐龙) The introduction of the Dinosaurs Dinosaurs lived for ......