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Câu hỏi:
Carbon dioxide is released through_________ processes such as respiration and volcano eruptions and through_______ activities such as deforestation, land use changes, and burning fossil fuels.
- A. human - natural
- B. natural - human
- C. man-made - ordinary
- D. ordinary - man-made
Lời giải tham khảo:
Đáp án đúng: B
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