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- Unit 1 Does weather affect our lives?
- Unit 2 Agriculture: our lifeline
- Unit 3 Something good to eat
- Unit 4 Think globally, act locally
- Unit 5 What animals can we raise?
- Unit 6 What do we know about plants?
- Unit 7 A giant fish out there
- Unit 8 Natural laws or human laws?
电子课本信息