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经济学家与考古学家就货币的问题展开了争论。经济学家:在所有使用货币的文明中,无论货币以何种形式存在,它都是因为其稀缺性而产生其价值。考古学家:在索罗斯岛上,人们用贝壳作为货币,可是该岛上贝壳遍布海滩,随手就能得到呵。下面哪项能对两位专家论述之间的矛盾作出解释

A. 索罗斯岛上居民节日期间在亲密的朋友之间互换货币,以示庆祝。
B. 索罗斯岛上的居民认为鲸牙很珍贵,他们把鲸牙串起来当作首饰。
C. 索罗斯岛上的男女居民使用不同种类的贝壳作货币,交换各自喜爱的商品。
D. 索罗斯岛上的居民只使用由专门工匠加工的有美丽花纹的贝壳作货币。

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肥皂是用油脂和烧碱经过煮制加工而成的。肥皂含有30%左右的水分‘,如果对它进行晾晒,不仅会使水分蒸发而收缩干裂,还能使内部的油脂和烧碱分离,结果油脂变为酸脂,烧碱因吸收空气中的二氧化碳而变为纯碱,这样肥皂的去污能力降低。由此可以推出 ( )

A. 将收缩干裂的肥皂加入30%的水可使其恢复原有的去污能力
B. 纯碱没有去污能力
C. 肥皂若缺少了油脂与烧碱中的任何一种将无去污能力
D. 是肥皂中的水分将油脂与烧碱结合在一起

由于工业废水的污染,淮河中下游水质恶化,有害物质的含量大幅度提高,这引起了多种鱼类的死亡。但由于蟹有适应污染水质的生存能力,因此,上述沿岸的捕蟹业和蟹类加工业将不会像渔业同行那样受到严重影响。以下哪项如果为真,将严重削弱上述论证

A. 许多鱼类已向淮河上游及其他水域迁移。
B. 上述地区渔业的资金向蟹业转移,激化了蟹业的竞争。
C. 作为幼蟹主要食物来源的水生物蓝藻无法在污染水质中继续存活。
D. 蟹类适应污染水质的生理机制尚未得到科学的揭示。

最近由于在蜜橘成熟季节出现持续干旱,四川蜜橘的价格比平时同期上涨了三倍,这就大大提高了橘汁酿造业的成本,估计橘汁的价格将有大幅度的提高。以下哪项如果是真的,最能削弱上述结论

A. 去年橘汁的价格是历年最低的
B. 其他替代原料可以用来生产仿橘汁
C. 最近的干旱并不如专家们估计的那么严重。
D. 除了四川外,其他省份也可以提供蜜橘。

Section Ⅱ Reading Comprehension Part A Directions: Read the following four texts. Answer the questions below each text by choosing A, B, C or D. Mark your answers on ANSWER SHEET 1. Text 1 Mary Eberstadt writes in Home-Alone America that growing obesity, the high incidence of sexually transmitted disease among teenagers and an overdependence on drugs such as Ritalin for attention deficit disorder are often the fault of parents who "outsource" their responsibilities. "We tend to think that the problems with juveniles are located at the bottom end of the social spectrum, but latchkey children are more common among the affluent," said Eberstadt, a mother of four who is a conservative writer and research fellow at Stanford University’s Hoover Institution. According to the most recent figures from the US Census Bureau, 41% of children aged 12 to 14 regularly look after themselves at the end of the school day. The figures rise with prosperity. For children aged 5 to 14, "self-care increases from 11% of children in poverty to 22% of those with family incomes at least double the poverty line." Eberstadt’s book is dividing sociologists, critics and partisans in the "mommy wars" between stay-at-home and working parents. A child clings to the ankles of his smartly dressed mother to stop her leaving for work on the front of the book; he does the same to his father on the back. P. J. O’Rourke, the conservative commentator and satirist, supports Eberstadt’s thesis. "If you don’t think (her) arguments have merit, try treating your dog the way America treats its kids," he said. "Give the puppy her own set of house keys and put her in front of the television instead of taking her for a walk. Let her eat anything she wants and house train herself. Send her to another master for visitation at the weekends. And when she comes into heat, turn her loose in the pound." James Q. Wilson, author of The Marriage Problem: How Our Culture Has Weakened Families is one of the intellectual forces behind zero tolerance policing. He praised the book’s "great, unarguable theme that parental care is of decisive importance in shaping the character of our children". Feminist critics, in contrast, accuse Eberstadt of Taliban-style thinking. The Washington Post attacked her "seductive" but "nasty" opinions and lack of "interest in how real people live or think about their lives". Eberstadt insists that she is not ordering women back to the home. "The bottom line is a lot more nuanced," she said. "It doesn’t have to be ’you’ there after school, but there are not enough protective, supporting, loving adults around." Neighbourhoods, she added, "are so emptied of adult presence that even the richest kids just go home, throw the deadbolt and get no exercise more strenuous than walking from the video game to the refrigerator." The result of being home alone is not just snacking and obesity but casual sex, leading to an explosion in venereal diseases that can lead to infertility and cervical cancer, Eberstadt said. Mary Eberstadt would mostly agree()

A. the problems with juveniles are located at the bottem end of the social spectrum.
B. women shall not go out to work but stay at home.
C. children in rich families are lack of exercises.
D. leaving children alone will lead to many diseases.

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