很纠结，十分纠结，非常纠结，纠结纠结··og12的三道题·谢谢

小娟子nana

116
Firms adopting “profit-related-pay” (PRP) contracts pay wages at levels that vary with the firm’s profits. In the metalworking industry last year, firms with PRP contracts in place showed productivity per worker on average 13 percent higher than that of their competitors who used more traditional contracts.
If, on the basis of the evidence above, it is argued that PRP contracts increase worker productivity, which of the following, if true, would most seriously weaken that argument?
(A) Results similar to those cited for the metalworking industry have been found in other industries where PRP contracts are used.
(B) Under PRP contracts costs other than labor costs, such as plant, machinery, and energy, make up an increased proportion of the total cost of each unit of output.
(C) Because introducing PRP contracts greatly changes individual workers’ relationships to the firm, negotiating the introduction of PRP contracts is complex and time consuming.
(D) Many firms in the metalworking industry have modernized production equipment in the last five years, and most of these introduced PRP contracts at the same time.
(E) In firms in the metalworking industry where PRP contracts are in place, the average take-home pay is 15 percent higher than it is in those firms where workers have more traditional contracts.
答案选d。其实我的疑惑和这个链接的疑惑差不多。
http://forum.chasedream.com/GMAT_CR/thread-448283-1-1.html
就是该题的d项，想表达的是很多metalworking这个行业的公司已经升级了本公司的生产工具，而且大多数这些公司也采用了PRP的合共。
那难道competitor没有升级本公司的生产工具吗？如果连competitor也都升级了本公司生产工具，那么d对文章起到support的作用。但是如果competitor没有升级，那么d就起削弱作用。但是d项的many firm很难排除到底是否包括了competitor的，所以d选项有问题···请大侠们指教

120The earliest Mayan pottery found at Colha, in Belize, is about 3,000 years old. Recently, however, 4,500-year-old stone agricultural implements were unearthed at Colha. These implements resemble Mayan stone implements of a much later period, also found at Colha. Moreover, the implements\' designs are strikingly different from the designs of stone implements produced by other cultures known to have inhabited the area in prehistoric times. Therefore, there were surely Mayan settlements in Colha 4,500 years ago.
Which of the following, if true, most seriously weakens the argument?

(A) Ceramic ware is not known to have been used by the Mayan people to make agricultural implements.
(B) Carbon dating of corn pollen in Colha indicates that agriculture began there around 4,500 years ago.
(C) Archaeological evidence indicates that some of the oldest stone implements found at Colha were used to cut away vegetation after controlled burning of trees to open areas of swampland for cultivation.
(D) Successor cultures at a given site often adopt the style of agricultural implements used by earlier inhabitants of the same site.
(E) Many religious and social institutions of the Mayan people who inhabited Colha 3,000 years ago relied on a highly developed system of agricultural symbols.
答案选d。d的意思是玛雅人模仿了早期文明的农业用具。可是题目中明明已经说了Moreover, the implements\' designs are strikingly different from the designs of stone implements produced by other cultures known to have inhabited the area in prehistoric times.也就是说这种石质农具跟其他文明完全不同，那么这个农具只可能是玛雅人造的，那么这个题目的推理其实是无懈可击的。痛苦中····

123

36.(32124-!-item-!-188;#058&006025)

Outsourcing is the practice of obtaining from an independent supplier a product or service that a company has previously provided for itself.Vernon, Inc., a small manufacturing company that has in recent years experienced a decline in its profits, plans to boost its profits by outsourcing those parts of its business that independent suppliers can provide at lower cost than Vernon can itself.

Outsourcing is the practice of obtaining from an independent supplier a product or service that a company has previously provided for itself.Vernon, Inc., a small manufacturing company that has in recent years experienced a decline in its profits, plans to boost its profits by outsourcing those parts of its business that independent suppliers can provide at lower cost than Vernon can itself.




Outsourcing is the practice of obtaining from an independent supplier a product or service that a company has previously provided for itself.Vernon, Inc., a small manufacturing company that has in recent years experienced a decline in its profits, plans to boost its profits by outsourcing those parts of its business that independent suppliers can provide at lower cost than Vernon can itself.

Which of the following, if true, most strongly supports the prediction that Vernon's plan will achieve its goal?

Which of the following, if true, most strongly supports the prediction that Vernon's plan will achieve its goal?




Which of the following, if true, most strongly supports the prediction that Vernon's plan will achieve its goal?

(A) Among the parts of its business that Vernon does not plan to outsource are some that require standards of accuracy too high for most independent suppliers to provide at lower cost than Vernon can.

(B) Vernon itself acts as an independent supplier of specialized hardware items to certain manufacturers that formerly made those items themselves.

(C) Relatively few manufacturers that start as independent suppliers have been able to expand their business and become direct competitors of the companies they once supplied.

(D) Vernon plans to select the independent suppliers it will use on the basis of submitted bids.

(E) Attending to certain tasks that Vernon performs relatively inefficiently has taken up much of the time and effort of top managers whose time would have been better spent attending to Vernon's core business.
答案是b。看不懂原文，能帮忙翻译一下吗？同时能帮忙解释一下选b的理由吗？谢谢

小娟子nana

楼主封了这个吧，本人由于十分十分困倦，竟然没有处理好排版，就上传了问题·····我的错，我重新发了问题上来http://forum.chasedream.com/GMAT_CR/thread-448290-1-1.html

joyceblue520

此题属于因果型结论

因1：4500年前的农业工具在C出土，这些工具和Mayan后来用的石头工具很相似，后者也在C挖掘出来（主要原因）
因2：这些工具的设计与其他史前居住在这个区域的民族所使用的工具区别很大（次要原因）

果：Mayan4500年就居住在C

解题方法：隔断因果


选项
A无关
B无关
C无关
D隔断因果
如果Mayan adopted the style of agricultural implements used by  earlier inhabitants的话，那么这些出土的工具不能推出玛雅人4500年前就到此定居，可能是其他民族
E无关

chenminxia1992

题目上说的是和4500年之前的   other cultures known to have habitated here , 还有unknown的呢~