og上三道不是很明白的逻辑题

67，A greater number of newspapers are sold in Town S than in Town T.Therefore,the citizens of Town S are better informed about major world events than are the citizens of Town T.
Each of the following,if true,weakens the conclusion above EXCEPT:
answer:The average newsstand price of newspapers sold in Town S is lower than the average price of newspapers sold in Town T.
我觉得这个答案也表明了how greater newspapers sales can occur without the average citizen having greater familiarity with the news呀，为什么og解释说它只解释销售量的区别，而没有推翻在这区别基础上的结论，所以应该选这个答案？

106。Property taces are typically set at a flat rate per $1000 of officially assessed value. Reassessments should be frequent in order to remove distortions that arise when property values change at differential rates.In practice,however,reassessments typically occur when they benefit the government-that is,when their effect is to increase total tax revenue.
If the statements above are true,which of the following describes a situation in which a reassessment should occur but is unlikely to do so?
C.Property values have for the most part risen sharply;yet some have dropped slightly.
D.Property values have for the most part dropped significantly;yet some have risen slightly
答案选D，可我选C，对于c，因为总的价值还是向上长的，所以政府可以得到更多税收，所以就不想重新评估，这个思路，不知道是哪错了？？[em26][em26][em26]

还有就是153题，其中有句话不是很理解，望指点，the threshold of economic viability for solar power(that is ,the price per barrel to which oil would have to rise in order for new oil-fired power plants)[em01]

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zyh79发表于 2002-10-21 10:24 | 只看该作者

67.原文：s城报纸卖得多，所以s城人们知道得多。
可能的削弱方向：直接说人们知道得不多。
               报纸卖得多与人们知道得多没有联系。
E答案说：s城报纸价格低，这只解释了s城报纸为什么卖得多，
         但不能削弱结论---人们知道得多。
如果E要勉强成为削弱答案，那题目也应该是s城报纸卖得多，是因为s城人们知道得多
106。只要财产价值变化剧烈，理论上应该重评估；
   但实际上，只有对政府有利才可能重评估。
   所以c答案两个条件都满足，重评估必发生。
153。太阳能存在的经济临界值未变，仍为35$。（临界值指：为了是太阳能电厂比原油电厂更经济，每桶原油应升高的价格）
现在，太阳能价格便宜了，差值未变，所以原油价格也应该便宜。

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