内容正文:
Unit 4 Space exploration
1. astronaut n.____________
2. procedure n.__________
3. metal adj.______________
4. centimetre abbr.__________
5. intelligent adj._______;___________
6. rocket n.___________;__________
7. gravity n._______________
8. frontier n._______;____________
9. vehicle n.___________;_________
10. universe n.__________________
11. determined adj.___________;_________
12. determine vt._______;____________
13. satellite n.___________;_________
14. launch vt.&n._______;___________
15. orbit n._____________vt.&vi. __________
16. giant adj._________n.____________
17. leap (leapt, leapt) (leaped, leaped) vt.&vi.________
18. mankind n.__________
19. agency n.______________
20. transmit vt.&vi.___________
21. data n.(pl.)_______________
22. disappointed adj._____________
23. desire n.___________ vt.__________
24. carry on ________________
25. ongoing adj._________________
26. on board _________________
27. independently adv.______________
28. independent adj._______________
29. spacecraft n.________________
30. spacewalk n.___________;__________
31. jade n._______;____________
32. dock vt.&vi._________ n._____________
33. Signal vt.&vi.___________ n.__________
34. in the hope of doing sth. _____________
35. so as to (do sth.) __________;_________
36. recycle vt.___________;_________
37. muscle n._______;__________
38. lack n.___________vt.____________
39. float vi._____________ vt._______________
40. otherwise adv._________;_________
41. beyond prep.__________;__________
42. solar adj.__________;________
43. solar system __________;________
44. current adj.__________;________
45. figure out _______;_______;_______
46. sufficient adj.__________;________
47. soap n.__________
48. towel n.___________;__________
49. microwave n.______________
50. tissue n.___________;__________
51. facility n.___________;__________
52. keen adj.__________;________
53. globe n._______;_______;_______
54. argue vt.&vi.__