揽瓜阁逻辑做题小分队 第98天

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Mayor: Since the time that our city's central streetcar line was built ten years ago, over $4 billion of private development has occurred within one-half kilometer of the line. This private development increased the city's tax revenue over those ten years just enough to compensate for the cost of building that line. So our city's proposed development of an eastside streetcar line through a similar neighborhood should also pay for itself within ten years.
Which of the following is an assumption the mayor's argument requires?
A. Over the past ten years, private developers have invested in significant development within one-half kilometer of the proposed eastside streetcar route.
B. Little if any of the private development referred to would have occurred if the streetcar line had not been built.
C. One benefit to the city from the central streetcar line has been the increased tax revenue from private development in other parts of the city.
D. Less than $4 Billion of private development has occurred more than one-half kilometer from the central streetcar line over the past ten years.
E. The central streetcar line did not cost the city significantly more to build than the eastside streetcar line will cost.



A software company plans to develop new open-source software, which will be created online through the volunteer efforts of any interested programmers. Although the software will be free for anyone to use, the company predicts that it will nonetheless boost profits, since it will, cost almost nothing to develop and will improve the company's status in the eyes of customers in the market for its other software.
Which of the following, if true, would most help to support the company’s prediction about the effects of implementing the plan?
(A) Most customers in the market for the kinds of software the company makes prefer to buy from companies that make open-source software.
(B) The company has already improved its status among programmers by developing a variety of other open-source software.
(C) The company should endeavor to improve its status and name recognition in the eyes of customers in the market for the kinds of software it makes.
(D) The company's profits are currently growing, and it has high status in the eyes of its customers.
(E) Many software customers would prefer to use free open-source software rather than pay for commercial software products.



参考答案：
BA

Conlinsanta

BA

HANNAHHH

O

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BA

ccccherry

BA

CaryX

Mark一下！               

12121212133

Mark一下！               

NCse

同意！               

svwma

BA

zyycn

1、中心line建成后私人投资增加，税收在10年回本，因此东边line也可以在10年回本。
问assumption
思考：类比论证，考虑两个line的相似处，或者中心line与回本之间搭桥。

A：过去10年，私人开发者已经在东边line投资了。不是前提。
B：如果line没建成，则不会有私人开发者来投资。正确，建成line就会吸引私人投资，因此税收增加回本，搭桥。
C：中心line的好处是可以获得从其他地区私人投资者的税。不是前提。
D：中心line半公里以外的投资少于4billion。无关。
E：中心line的成本不会比东边line更高。方向反。

选B

2、因为开放软件没有成本且增加公司地位，所以可以提升利润。
问strength
思考：因果论证，考虑加强因果联系、排除他因削弱、类比加强或单独加强结果

A：客户购买软件时，偏爱那些提供开放软件的公司。正确，加强因果联系，增加营收提高利润。
B：公司已经开发了其他开放软件。无法加强。
C：公司应该致力于提高地位和名声。无法加强。
D：公司利润正在增长，且地位很高。无法加强。
E：客户更喜欢用免费的开放软件而不是付费软件。削弱。

选A