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Câu hỏi:
Which of the followings affect an ecosystem as the whole?
- A. Groundwater contamination
- B. Air contamination
- C. Soil contamination
- D. Surface water contamination
Lời giải tham khảo:
Đáp án đúng: D
Dẫn chứng: Changes in the water chemistry due to surface water contamination can affect all levels of an ecosystem.
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