道理很简单: C 如果总量发生变化,比例将无参考价值; E 如果比例发生变化,总量减少将无参考价值;
D在reduce the number of truckloads of refuse to be incinerated to half of last year’s number.的前提下,generate no more residue ash per truckload incinerated than did the refuse incinerated last year. 将确保减少ash总量。