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.
我认为选b .
请看c里的两个过程是怎么说的“the process of cleaning the coal" and "the process of filtering the emissions" coal 是煤,清除煤的过程?清除了煤工厂也要倒闭了,因为就是以燃烧煤的工厂,题干是说removes most sulfur from coal before combustion----在煤燃烧前除掉硫磺。. 这是两个概念;而”过滤emission“也和题干“filter sulfur dioxide from their emissions”是两个不同的过程,C项不仔细看以为是对的。其实不对。
E是无关选项,题目用虚拟语气说“could have save money”说如果换了,就省钱,和E的内容没关。
B项过于简单,但是没有更合适的答案了。 |