知识问答
最佳答案：City of the living environment more and more bad, poor air quality, everywhere i
最佳答案：1.garbage sorting/refuse classification2.reuse of newspaper and glass3.landfill
最佳答案：There is a small river in my hometown. Two years ago, in a chemical factory was
最佳答案：1, she devoted all her time in the protection of wild animals.2, when he returne
最佳答案：Because the humanity uses the resources excessively and discharges the waste gas
