UNIT 4ASTRONOMY:the science of the stars
课前预习
Part One: Words and Expressions
一． 重点词汇
1.astronomy n._____________ 2. system n. __________3. theory n.____________
4. globe n._________5. violent adj ._______________6. atmosphere n. __________
7. unlike adj . _________8. harmful adj. ____________9. multiply v. ____________
10. oxygen n. __________11. exist vi.____________12. puzzle n. __________v. ___________
13. biology n. __________14. satellite n.__________15. climate n._________
16. pull n/vt. ________________
二． 重点短语
1. 及时；终于___________________ 2. 产生；分娩 _______________
3. 轮到某人_____________________ 4. 阻止；制止_______ __________
