飞向蓝天的恐龙
-- 飞向蓝天的恐龙
这是一篇科普文章，介绍了远古恐龙与鸟类的关系。
Dinosaurs Flying to Blue Sky
-- Dinosaurs Flying to Blue Sky
The popular science reading tells the relationship between ancient dinosaurs and birds.
本课的学习课件
LESSON CLIPS
LESSON CLIPS
>>> 绝色中文配套课本
