污泥处理的主要目的有（），（），（）.
参考答案：减容；卫生化；资源化
What he said didn’t mean to hurt Mary, but he felt ________ it differently.
A．he could express
B．he could have expressed
C．he would express
D．he must have expressed
我国的局部振动卫生标准可保护百分之几的作业工人20年（年接振250d，日接振2.5h）不致发生振动性白指（）。
A.100％
B.95％
C.90％
D.85％
E.80％
