Unit4 Astronomy:the science of the stars-Vocabulary and Useful Expressions学习目标：1. Try to remember the key words and expressions. 2. Try to master the usage of some key words and expressions.学习重点：1. The usages of key words: ①atmosphere ②harmful ③mass ④climate ⑤lay 2.The ...

时间:2025-06-02 17:11栏目:中学教育