Last year all refuse collected by Shelbyville city services was incinerated.This incineration generated a large quantity of residue ash.In order to reduce the amount of residue ash Shelbyville generates this year to half of last year’s total, the city has revamped its collection program.This year city services will separate for recycling enough refuse to reduce the number of truckloads of refuse to be incinerated to half of last year’s number.
Which of the following is required for the revamped collection program to achieve its aim?
A.This year, no materials that city services could separate for recycling will be incinerated.
B.Separating recyclable materials from materials to be incinerated will cost Shelbyville less than half what it cost last year to dispose of the residue ash.
C.Refuse collected by city services will contain a larger proportion of recyclable materials this year than it did last year.
D.The refuse incinerated this year will generate no more residue ash per truckload incinerated than did the refuse incinerated last year.
E.The total quantity of refuse collected by Shelbyville city services this year will be no greater than that collected last year
.[D]
虽然答案是D，我也觉得选D更好，可是我感觉D好像也有点问题啊。D说今年所焚烧的垃圾，每车垃圾产生的灰烬不比去年多，但它并没总的不能循环的垃圾数量的多少，假如说 要焚烧的垃圾量比去年多，虽然每车的灰烬量少，但不能保证总的灰烬量少啊。
ls，谢谢啦。。不过我刚看了，明白了。
但是题目没说车数量的减少，说的是the number of truckloads of refuse.是说垃圾量，而不是垃圾车的数量。。
题目说要垃圾灰减小到一半，先让垃圾数量减少到一半。
所需的前提是每车的垃圾灰不会不以前多。作者: Zingales 时间: 2012-12-27 06:35
d我能够理解 那e呢 似乎也说得通呀？
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