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47. dating is like a cattle market
【定位】 根据题干中的a paper和women定位到原文第一段第一句Women often complain that dating is like a cattle market, and a paper just published in Biology Letters by Thomas Pollet and Daniel Nettle of Newcastle University, in England, suggests they are right.
【解析】 本题提问该论文与多数女人一致的看法是什么。题干中的...suggest they are right提示该论文同意女人们常见的看法，即文章开篇提到的女人的抱怨，所以complain后的宾语从句就是本题的答案。
48.Women choose men of high status，resources and good looks.
【定位】 根据题干中的contention和which is often denied by social scientists定位到原文第二段第一句和第二句Mr. Pollet and Dr. Nettle were looking for evidence to support the contention that women choose men of high status and resources, as well as good looks. That may sound common sense, but it was often denied by social scientists...
【解析】 本题提问遭到社会科学家否认的广受争议的话题究竟是什么，根据原文结构contention后是同位语从句，进一步解释contention的具体内容，后面提到这种广受争议的话题虽然被视为人之常情，但在过去却遭到社会科学家的否认。因此contention后同位语从句的内容就是本题的答案。
49. you have to look at natural populations
【定位】 根据题干中的experiments和zoologists定位到原文第二段最后三句Since then, a series of experiments in laboratories have supported the contention. But as all zoologists know, experiments can only tell you so much. Eventually, you have to look at natural populations.
【解析】 题干表述的是对该句意思的概括转述，虽然一系列实验都为这个观点提供了可靠依据。然而动物学家都比较倾向于相信从自然种群获得的数据。所以不能仅看实验数据，最终还是需要看自然种群的数据。题干是对这段话的简单概括，答案可直接从原文得出。
50. be particularly attractive
【定位】 根据题干中的market和scarcity of sellers定位到原文第三段They have examined...indeed, a market. Moreover, as in any market...if they are to make the exchange.
【解析】 题干是第三段整段的概括和简化，主旨为婚姻确实如同一个市场。而且，同其他市场一样,买主的稀缺迫使卖方必须拥有别具吸引力的商品才能与买主达成交易。原文中描述的是普通市场的情况，而题干中已经明确界定了in the market of marriage,所以答案不应照搬原文，应当结合题干适当变化，变为形容词。意思是在婚姻的市场中，缺少买方就意味着卖方必须非常有魅力。
51. A surplus of males.
【定位】 根据题干中的how picky women were定位到原文第四段末两句 Though the long-colonised eastern states had a sex ratio of one man to one woman,...“go west, young man”had resulted in a surplus of males. Mr. Pollet...how picky women are, given the chance.
【解析】 原文意思是在“年轻人，去西部”的口号影响下，其他州呈现了男性过剩的局面。这一局面恰好为Pollet先生和Nettle博士提供机会，让他们清楚地发现女性对男性的选择是多么挑剔。结合题干和原文很容易找到问题的答案应该是A surplus of males。
Section B
Passage One
本文围绕针对死刑是否应该存在展开讨论。许多人认为死刑对于凶杀具有有效的威慑作用，而其他人则认为没有令人信服的证据证明死刑降低了凶杀案的数量。
