og 2017 655求解

长安君

Last year all refuse collected by Shelbyville city services was incinerated. This incineration generated a large quantity of residual ash. In order to reduce the amount of residual 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?

This year, no materials that city services could separate for recycling will be incinerated.

Separating recyclable materials from materials to be incinerated will cost Shelbyville less than half what it cost last year to dispose of the residual ash.

Refuse collected by city services will contain a larger proportion of recyclable materials this year than it did last year.

The refuse incinerated this year will generate no more residual ash per truckload incinerated than did the refuse incinerated last year.

The total quantity of refuse collected by Shelbyville city services this year will be no greater than that collected last year.

回收的垃圾要是被焚烧的话灰烬减半的目的肯定达不到啊，为什么不选a？

长安君

RichardVeritas 发表于 2017-8-3 11:13
个人理解：
A和E问题类似。

谢谢?

RichardVeritas

个人理解：
A和E问题类似。

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.
市政会通过回收，把送去焚烧的废物降到去年的一半

这句话是一个给定假设，不管A和E成立与否，它都成立。 E 哪怕今年垃圾更多，市政可以回收更多，达到还是烧的是去年一半。A 也类似。即使有些回收物必须要烧，市政还是可以做到烧的废物是去年一半。

答案应该是D。烧的废物是去年一半,但是如果废物每车产生灰烬更多，总体灰烬就不止一半了。

这题体现CR考核的是逻辑思维的严密，细微之处做文章。
欢迎发题到 “Richard GMAT 770 逻辑答题讨论”
http://forum.chasedream.com/foru ... 417&fromuid=1294035