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Câu hỏi:
For which of the following reasons can natural pollutants play an important role in controlling air pollution?
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A.
They function as part of a purification process.
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B.
They occur in greater quantities than other pollutants.
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C.
They are less harmful to living beings than other pollutants.
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D.
They have existed since the Earth developed.
Lời giải tham khảo:
Đáp án đúng: A
Giải thích:
Vì lý do nào sau đây, các chất ô nhiễm tự nhiên có thể đóng vai trò quan trọng trong việc kiểm soát ô nhiễm không khí?
A. Chúng hoạt động như một phần của quá trình thanh lọc.
B. Chúng có số lượng lớn hơn các chất ô nhiễm khác.
C. Chúng ít gây hại cho sinh vật hơn các chất ô nhiễm khác.
D. Chúng tồn tại từ khi Trái đất phát triển.
Thông tin:
As the Earth developed, the concentration of these pollutants was altered by various chemical reactions, they became components in biogeochemical cycles. These serve as an air purification scheme by allowing the compounds to move from the air to the water or soil. (Khi Trái đất phát triển, nồng độ của các chất ô nhiễm này bị thay đổi bởi các phản ứng hóa học khác nhau, chúng trở thành thành phần trong các chu trình sinh địa hóa. Chúng như một sơ đồ lọc không khí bằng cách cho phép các hợp chất di chuyển từ không khí sang nước hoặc đất.)
→ Chọn đáp án A
Hãy trả lời câu hỏi trước khi xem đáp án và lời giải -
A.
Câu hỏi này thuộc đề thi trắc nghiệm dưới đây, bấm vào Bắt đầu thi để làm toàn bài
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