【OG24-782题】Last year all refuse collected by Shelbyville city services was incinerated, This incineration generated a large quantity of residual ash. ln 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? _mofa留学圈mofaGRE在线题库系统_GRE在线搜题_GRE题库解析_GRE真题机经_GRE课程_GRE培训机构

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Last year all refuse collected by Shelbyville city services was incinerated, This incineration generated a large quantity of residual ash. ln 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.

正确答案： D

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题干翻译
Shelbyville今年产生的残余灰烬量要减少到去年总量的一半。为实现这一目标，该市调整了收集计划。今年城市服务部门将分离出足够的可回收垃圾，以将焚烧的垃圾车数量减少到去年的一半。以下哪项是调整后的收集计划实现目标所必需的？ 逻辑链
Reduce truckloads → Halve ash 问题类型
假设（必要条件） 推理过程
目标是将残余灰烬量减半，措施是把焚烧的垃圾车数量减半。那么潜在假设是每车焚烧垃圾产生的灰烬量不会增加，否则即使车数减半，灰烬量也不一定能减半。 选项分析
A选项：今年城市服务部门可分离回收的材料不会被焚烧。即使有部分可回收材料被焚烧，也不明确对灰烬总量减半目标的影响，不是必要假设，排除。 B选项：从待焚烧材料中分离可回收材料的成本比去年处理残余灰烬成本的一半还低。成本与能否实现灰烬量减半目标无关，排除。 C选项：今年城市服务部门收集的垃圾中可回收材料的比例比去年大。可回收材料比例与最终灰烬量没有直接关联，排除。 D选项：今年每车焚烧的垃圾产生的残余灰烬量不比去年多。符合推理中的必要假设，当选。 E选项：今年Shelbyville城市服务部门收集的垃圾总量不大于去年。垃圾总量与灰烬量之间没有必然联系，即使总量增加，只要焚烧部分每车灰烬量控制好，仍可能实现目标，排除。

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