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What is acid rain caused by?A. Too much oxygen in the airB. Sulfur dioxide and nitrogen oxidesC. Excessive rainfallD. Volcanic eruptions only

What is acid rain caused by?

A. Too much oxygen in the air

B. Sulfur dioxide and nitrogen oxides

C. Excessive rainfall

D. Volcanic eruptions only

题目解答

答案

B. Sulfur dioxide and nitrogen oxides

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