题目

______, we heard a whisper. Then we heard______ whisper.         A. Sudden, other            B. Suddenly, the other          C. As sudden, another      D. Suddenly, another 答案：D下列不属于垃圾无害化处理的方法是（　　）A．露天焚烧B．封闭式焚烧C．卫生填埋D．分类回收