鸡精里写第一题是这个，感觉好像og12里的第一题啊，是不是呢，求证明~ 1. “Life expectancy” is the average age at death of the entire live-born population. In the middle of the nineteenth century, life expectancy in North America was 40 years, whereas now it is nearly 80 years. Thus, in those days, people must have been considered old at an age that we now consider the prime of life. Which of the following, if true, undermines the argument above? (A) In the middle of the nineteenth century, the population of North America was significantly smaller than it is today. (B) Most of the gains in life expectancy in the last 150 years have come from reductions in the number of infants who die in their first year of life. (C) Many of the people who live to an advanced age today do so only because of medical technology that was unknown in the nineteenth century. (D) The proportion of people who die in their seventies is significantly smaller today than is the proportion of people who die in their eighties. (E) More people in the middle of the nineteenth century engaged regularly in vigorous physical activity than do so today.作者: glacier超 时间: 2010-6-30 21:49
大家还有啥其他的逻辑鸡精讨论，希望都贴过来吧~~~作者: nowwsy 时间: 2010-6-30 21:50
很类似诶~~ 本月的答案挺靠谱儿的作者: glacier超 时间: 2010-6-30 21:56
5.原来是上月的变种：一个国家卖的汽油有premiumoil，售价比其它的要贵，该国家使用premium oil的车型不超过10%，使用premium oil的车型一般用premium oil，不需要使用premium oil的车型如果用premium oil，对其性能没有任何的提高，但该国家premium oil的销量比例超过15%，说明人们浪费， 问消弱， 选了汽车拥旧了以后需要好汽油才能正常工作。
[考古]： V1 from emily影瞳 740 说现在gasoline 的生产成本增加了，人们移向了柴油，但是gasoline 有了新的生产方法（出现了一个叫eth..的物质可以生产出），gasoline supplies增多了。 （按说柴油应降低）， 但是cost of 柴油反倒增高了，问为什么？我选的是柴油需要the byproduct of the gasoline process. 选项中还有：生产eth..的成本很expensive。 V2 from wmf 700+ 汽油和柴油那个 也是狗的答案
GWD类似： V1 from nicolekwok 770 Q17:GWD32-Q8 Last August the XT chain of gasoline stations had a temporary sales promotion in effect. In the promotion, any customer who made a purchase of ten or more gallons of gasoline was entitled to a free car wash. For the month of August, XT experienced a ten percent increase in gasoline sales as compared to sales in August the previous year, so evidently the promotion was successful as a means of boosting sales. In evaluating the argument, it would be most helpful to answer which of the following? A. In the areas in which XT’s gasoline stations operate, how did total combined gasoline sales for all gasoline stations last August compare with sales for the previous August? B. Was the money that XT earned from the increase in gasoline sales enough to offset the cost of providing free car washes during the promotion? (profit 的比较) C. Were there any customers who bought ten or more gallons at an XT gasoline station during the promotion who would have or more gallons at an XT gasoline in lower quantities, but more frequently, if the promotion had not been in effect? D. Did XT or any of its gasoline stations have to pay other businesses to provide the car washes that customers were offered in the promotion? Are XT’s gasoline sales in August usually significantly higher than one twelfth of XT’s annual gasoline sales?作者: Summereve 时间: 2010-7-4 14:51
上面GWD答案是什么啊.A吗?作者: hukeab 时间: 2010-7-4 15:07