帮小妹指教T-3-Q29

葛佳

T-3-Q29.
The emission of sulfur dioxide when high-sulfur coal is burned is restricted by law. New coal-burning plants usually comply with the law by installing expensive equipment to filter sulfur dioxide from their emissions. These new plants could save money by installing instead less expensive cleaning equipment that chemically removes most sulfur from coal before combustion.

Which of the following, if known, would be most relevant to evaluating the claim above about how new-coal burning plants could save money?

A.    Whether existing oil-burning plants are required to filter sulfur dioxide from their emissions.
B.    Whether the expense of installing the cleaning equipment in a new plant is less than the expense of installing the cleaning equipment in an older plant.
C.    Whether the process of cleaning the coal is more expensive than the process of filtering the emissions
D.    Whether lawful emissions of sulfur dioxide form coal-burning plants are damaging the environment.
E.    Whether existing plants that use the filtering equipment could replace this equipment with the cleaning equipment and still complete with new plants that install the cleaning equipment.

没有找到答案我选的是B 不大明白这道题

yawgamoth86

在高硫化煤燃燒時候排放的SD是被法律限制的。新工廠安裝高價的過濾設備來符合法律的要求。這些工廠可以剩錢 如果他們安裝便宜一點的化學清洗設備 在燃燒前就去除硫。
所以這個題目我們假設 貴設備要10刀，便宜的5刀
我們需要考慮的就是選項C，化學清理的過程是否比過濾過程貴 例如化學清洗所需要的化學品 和 過濾網的價錢相比
因為設備便宜不代表使用他也便宜

葛佳

在高硫化煤燃燒時候排放的SD是被法律限制的。新工廠安裝高價的過濾設備來符合法律的要求。這些工廠可以剩錢 如果他們安裝便宜一點的化學清洗設備 在燃燒前就去除硫。
所以這個題目我們假設 貴設備要10刀，便宜的5刀
我們需要考慮的就是選項C，化學清理的過程是否比過濾過程貴 例如化學清洗所需要的化學品 和 過濾網的價錢相比
因為設備便宜不代表使用他也便宜

-- by 会员 yawgamoth86 (2010/5/28 2:59:19)

我选的是B，他也是说费用啊
怎么理解？
请指教

zxcgmat

题目中说了 旧设备是安装过滤装置filter equipment使得燃烧后的含硫元素的物质被过滤掉   新设备是安装清除装置cleaning equipment使得S在被燃烧前就清楚掉
B选项是说新旧设备都安装cleaning equipment 和题目就冲突

原文最后的单词combustion是燃烧的意思 话说有看不懂的单词真的有很大障碍的 我也是查了单词后才明白的选项。。。
焦虑中。。。 忽然发现有好多看不懂的词 可是马上就要上战场了。。。

yawei5252

我也选的C…你应该没有仔细读题吧，你再好好看看B，它没有说题目中的新厂中是用新的烧的设备还是用化学处理设备，而是说的无关紧要的新旧厂的问题，

holacraig

应该比较明显是选C吧，需要把安装设备和安装之后使用的费用分开对待。

peter3008

The emission of sulfur dioxide when high-sulfur coal is burned is restricted by law. New coal-burning plants usually comply with the law by installing expensive equipment to filter sulfur dioxide from their emissions. These new plants could save money by installing instead less expensive cleaning equipment that chemically removes most sulfur from coal before combustion.

Which of the following, if known, would be most relevant to evaluating the claim above about how new-coal burning plants could save money?

注意读题: 结论在问题里面已经告诉你了,how new-coal burning plants could save money
看提干: new equp: expensive filter SO2 after burned
            old equp: cheap filter S before burned
目的: To save money

评价: 是否new equp可以节省money

new equp 的安装费已经比old equp贵了

caoqin1981

new equp 的安装费已经比old equp贵了?

我理解题干1.工厂根据法律通常装昂贵的设备过滤SD，2.这些工厂其实为了省点钱是可以安装一个比较不贵的清洁设备在燃烧前对煤化学分离

问 2这样是否可以达到省钱的目的

这道题首先误区是到底装贵的设备还是便宜的设备，C是说虽然你图便宜装了，但是装了后煤清洁这个过程更费钱。

yakev6

total cost= equipment cost(fix cost) + operation cost (process cost)
from the stimulus we know cleaning equipment is less expensive than filter euipment,
thus, to evaluate the the total cost saving between two technologies is to check the process cost gap between two methods.
that is what C is talking about.
C. Whether the process of cleaning the coal is more expensive than the process of filtering the emissions

nihongmeng

我只是不懂These new plants could save money by installing instead less expensive cleaning equipment that chemically removes most sulfur from coal before combustion.
这句话中的instead是什么意思。。。