中国大学MOOC: Natural rubber usually is much stronger and harder than vulcanized rubber.
举一反三
- Natural rubber usually is much stronger and harder than vulcanized rubber. A: 正确 B: 错误
- Can natural rubber be used in irrigation and drainage hoses？
- 中国大学MOOC Life was much harder than it is today
- 中国大学MOOC: He is much __________ (fit) and stronger than his brother.
- Can natural rubber be used in irrigation and drainage hoses？ A: 正确 B: 错误