An air pollutant is defined as a compound added directly The word "these" in the second

Câu hỏi :

Read the following passage and mark the letter A, B, C, or D on your answer answer to each of the questions

A. the various chemical reactions

B. the pollutants from the developing Earth

C. the compounds mover to the water or soil

D. the components in biogeochemical cycles

* Đáp án

D

* Hướng dẫn giải

Đáp án D

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