求助OG12-107之前沒有討論過

a9141067s · 发表于 2009-12-1 14:22:23

107. 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?

(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 residual 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 residual 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.

答案是(D)

請問哪位NN幫忙說說(A)為啥不對

LTT12345 · 发表于 2010-1-2 12:44:43

同问啊！快被这道题逼疯了！！！

biantaishabi · 发表于 2010-1-2 23:08:28

文章中说的目的是要把烧垃圾的 residual ash减少一半，他们的办法是要把燃烧的垃圾的truckload减少一半，所以中间需要把truckload和residual ash的量联系起来的一环，要不就达不到目的。

a说的是事实，但是实际是文中已经提到的事实， recycling的话本来就不能烧掉，烧掉就没法recycling啦。

这是我的看法了，

ryanyhu · 发表于 2010-1-5 15:02:44

文章的推理过程是：今年一半垃圾被回收，一半垃圾焚烧，因此产生的废气也会降一半，但是这个推理建立在：“回收的垃圾和焚烧的垃圾如果全部被焚烧，将产生相同量的废气”这样一个基础上，举个极端的例子，如果回收的垃圾全部是焚烧不产生废气的垃圾，那么今年虽然有一半垃圾被收回，产生的废气还是和去年相等。
D排除了这种可能性，而A没有。

fehler · 发表于 2010-1-5 16:09:12

同意biantaishabi的说法 (不得不指出这位仁兄的id很酷)

现在的措施已经是 reduce the number of truckloads,所以说,能不能reduce the number of truckloads已经不再讨论的范围之内.现在要讨论的就是,如果成功的 reduce the number of truckloads,那么能不能达到效果.这样的话,唯一的问题就是,这些truckloads烧掉以后residual ash per truckload 会不会变化.

文章也说了,他们计划separate for recycling enough;那么,如果达到了reduce the number of truckloads这个目的,即使还有recycling送去烧了,只要D弄清楚,就可以评估效果.

文章中说的目的是要把烧垃圾的 residual ash减少一半，他们的办法是要把燃烧的垃圾的truckload减少一半，所以中间需要把truckload和residual ash的量联系起来的一环，要不就达不到目的。

a说的是事实，但是实际是文中已经提到的事实， recycling的话本来就不能烧掉，烧掉就没法recycling啦。

这是我的看法了，

-- by 会员 biantaishabi (2010/1/2 23:08:28)

efay · 发表于 2010-1-30 09:12:03

说白了，这道题就是单量*数量=总量
residual ash/per truckloak * number of truckloads=total of residual ash

云南 · 发表于 2010-7-23 11:31:27

楼上解释很强很精辟

orehin · 发表于 2010-8-13 18:00:51

3#5#很强悍
我原来也选A的

天使追梦 · 发表于 2010-8-25 15:36:15

ding~

Jasmine5 · 发表于 2010-12-15 05:35:32

5楼很强悍，佩服

求助OG12-107之前沒有討論過

同问啊！快被这道题逼疯了！！！

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