来自莫振华的问题
急需空气污染短文(英语)
急需空气污染短文(英语)
1回答
2020-01-20 23:05
急需空气污染短文(英语)
急需空气污染短文(英语)
AIRPOLLUTIONSandstormsandthedustandgasesfromvolcanoespollutetheearth'satmospherenaturally.Butthemostseriouskindofairpollutioncomesfrompeople.Factories,powerstations,andrehicl...