虽然我也不相信是题目出了问题...但是这两道俺真心理解不能啊!!求指点!!!

蛋蛋音

Perkins: According to an article I read, the woolly mammoth‘s extinction in North America coincided with a migration of humans onto the continent 12,000 years ago, and stone spearheads from this period indicate that these people were hunters. But the author's contention that being hunted by humans contributed to the woolly mammoth‘s extinction is surely wrong since, as paleontologists know, no spearheads have ever been found among the many mammoth bones that have been unearthed.
Which of the following, if true, provides the strongest reason for discounting the evidence Perkins cites in arguing against the contention that being hunted by humans contributed to the North American extinction of woolly mammoths?

A. At sites where mammoth bones dating from 12,000 years ago have been unearthed, bones of other mammals have rarely been found.
B. The stone from which stone spearheads were made is unlikely to have disintegrated over the course of 12,000 years.
C. Conditions in North America 12,000 years ago were such that humans could not have survived there on a diet that did not include substantial amounts of meat.
D. Cave paintings in North America that date from 12,000 years ago depict woolly mammoths as well as a variety of other animals, including deer and buffalo.
E. Because of the great effort that would have been required to produce each stone spearhead, hunters would have been to leave them behind.

Reasoning
What would suggest that hunting by humans may have contributed to the mammoths' extinction, even though no spearheads have been found among mammoth bones? Perkins argues that since no spearheads have been found among mammoth remains, human hunting must not have contributed to the mammoths’ extinction. Perkins's argument assumes that humans did not hunt mammoths mainly with weapons other than spears; that spearheads would be left among remains of any mammoths killed with spears; that paleontologists have found a fair number of mammoth remains; and that any spearheads left among the remains would likely stay with them and be discovered. Any statement that calls any of these assumptions into question would provide a reason to discount the evidence Perkins offers.

A. If humans did not hunt mammoths, then mammoth bones probably would not be found with other mammal bones around prehistoric settlements where humans ate other mammals. Therefore, this would be compatible with Perkins’ argument.
B. This strengthens Perkins’ argument by out a possible alternative explanation of why paleontologists have found no spearheads in mammoth remains.
C. The prehistoric humans could have eaten meat other than mammoths, and this does not explain how they could have hunted mammoths without paleontologists finding spearheads in mammoth remains.
D. Perkins already acknowledges that humans coexisted with mammoths in North America, and this does not explain how humans could have hunted mammoths without paleontologists finding spearheads in mammoth remains.
E. Correct. This explains how, despite the evidence Perkins offers, humans may well have hunted mammoths without leaving any spearheads for paleontologists to discover in mammoth remains.
The correct answer is E.

我想问这E选项里是不是漏了个not?(hunters would not have been to leave them behind)...当时这道题看了N分钟还是没有选出来...看了答案更加理解不能...




Paper&rint is a chain of British stores selling magazines, books, and stationery products. In Britain, magazines’ retail prices are set by publishers, and the retailer’s share of a magazine's retail price 25 percent. Since Paper&rint’s margin on books and stationery products is much higher, the chain's management plans to devote more of its stores’ shelf space to books and stationery products and reduce the number of magazine titles that its stores carry.
Which of the following, if true, most strongly argues that the plan, if put into effect, will increase Paper&rint’s profits?

A. Recently magazine publishers, seeking to increase share in competitive sectors of the market, have been competitively cutting the retail prices of some of the largest circulation magazines.
B. In market research surveys, few consumers identify Paper&rint as a book or stationery store but many recognize and value the broad range of magazines it carries.
C. The publisher’s share of a magazine's price is 50 percent, and the publisher also retains all of the magazine's advertising revenue.
D. Consumers who subscribe to a magazine generally pay less per issue than they would if they bought the magazine through a retail outlet such as Paper&rint.
E. Some of Paper&rint’s locations are in small towns and represent the only retail outlet for books within the community.

Reasoning
What would make it least likely that devoting more of the business to books and stationery, and less to magazines, would increase profits? The reasoning behind the plan is that Paper&rint has a greater profit margin on books and stationery than it can legally attain on magazines, and that carrying more items with higher profit margins and fewer with lower profit margins will increase overall profits. A weakness in this reasoning is that profits depend on actually selling items, not merely on carrying them. If magazines sell far more briskly than other merchandise, shelf space devoted to magazines may generate higher profits, despite the magazines’ lower profit margins. If this were the situation, the plan might backfire and fail to increase profits.

A. Lower retail prices on magazines could lower Paper&rint's profits per magazine sold and hence make the plan to devote more shelf space to merchandise other than magazines more likely to increase overall profits.
B. Correct. If far more customers shop at Paper&rint for its broad range of magazines than for its books and stationery, then cutting the shelf space devoted to magazines may disappoint the customers, reducing overall sales and profits.
C. Paper&rint‘s magazine profits come from the 25 percent of the magazines’ retail price that goes to the retailer, no matter who gets the rest.
D. This would tend to reduce Paper&Print's magazine sales and hence make the plan to devote more shelf space to merchandise other than magazines more likely to increase overall profits.
E. This would tend to increase Paper&Print’s book sales at some stores and hence make the plan to devote more shelf space to books rather than magazines more to increase overall profits.
The correct answer is B.

题目问的是支持increase profits不是decrease profits啊orz...答案不是应该A么？


顺便所一句以上题目和答案均来自官网上买来的prep2012 pack1的cr部分，据说是和OG同源的。

morimori

Perkins: According to an article I read, the woolly mammoth’s extinction in North America coincided with a migration of humans onto the continent 12,000 years ago, and stone spearheads from this period indicate that these people were hunters. But the author’s contention that being hunted by humans contributed to the woolly mammoth’s extinction is surely wrong since, as paleontologists know, no spearheads have ever been found among the many mammoth bones that have been unearthed.

Which of the following, if true, provides the strongest reason for discounting the evidence Perkins cites in arguing against the contention that being hunted by humans contributed to the North American extinction of woolly mammoths?

(A)        At sites where mammoth bones dating from 12,000 years ago have been unearthed, bones of other mammals have rarely been found.

(B)        The stone from which stone spearheads were made is unlikely to have disintegrated over the course of 12,000 years.

(C)        Conditions in North America 12,000 years ago were such that humans could not have survived there on a diet that did not include substantial amounts of meat.

(D)        Cave paintings in North America that date from 12,000 years ago depict woolly mammoths as well as a variety of other animals, including deer and buffalo.

(E)        Because of the great effort that would have been required to produce each stone spearhead, hunters would have been unlikely to leave them behind.

或许还会有小伙伴求解~是漏了unlikely

双色鹿

第一题的E： “Because of the great effort that would have been required to produce each stone spearhead, hunters would have been to leave them behind.”  期中的leave them behind不是楼主理解的把这个矛头就“留在”大象尸骨的旁边，而是根据前半句话：“因为做一只矛头太费劲了”，所以这些猎人就“不要这种工具了”
因为原文中仅仅因为没有在大象尸骨附近找到矛头，就说大象灭绝不是人类干的，有一个隐含假设：人类猎杀大象肯定是用矛，而且矛头还会留在大象体内

至于第二个问题，我同意你的说法，但是你看那段解析，第一句话就说这是个削弱，并非加强，后来我用关键词搜了这道题，你看这个帖子
http://forum.chasedream.com/GMAT_CR/thread-573609-1-1.html?postid=15172517&searchmode=TopicContent&searchtext=stationery%20products
你的版本里面丢了一个“not”呀！
“Which of the following, if true, most strongly argues that the plan, if put into effect, will not increase Paper&rint’s profits?”
确实是GWD的题，我以前也做过，想起来拉

蛋蛋音

thanks~我了解啦~

alicezyk

第一题还是木有懂。。。。

alicezyk

还想问大家都是从PDF上COPY下来的？

cysteresa

原来少了一个NOT 啊  555555，感谢解答

Jianke311

前面那题的解释不对哦,如果做出一个工具很费劲,他们应该就不会轻易舍弃呀? 而且看解释似乎也是这个意思,所以我支持原题E漏了not

潇水若木

第一题我做过，应该是漏了not， 就是因为他们做个矛不容易，所以，每次都得再扒拉回来留着再用···

christina1314

第一题的问题没看懂。。。到底是要支持哪种观点啊。。。

liwen0625

我也认为E选项掉了not