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标题: 请问OG-153 [打印本页]

作者: vivianQQ 时间: 2003-5-10 23:25
标题: 请问OG-153

大家帮我看看题目是不是有问题？
153. Technological improvements and reduced equipment costs have made converting solar
energy directly into electricity far more cost-efficient in the last decade. However, 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 solar power plants to be more economical than new oil-fired power plants) is
unchanged at thirty-five dollars.
Which of the following, if true, does most to help explain why the increased cost-efficiency
of solar power has not decreased its threshold of economic viability?
~~~~~~~是不是应该是increased?我用的电子版，错误狂多,sigh,很影响自信心的说

(A) The cost of oil has fallen dramatically.
(B) The reduction in the cost of solar-power equipment has occurred despite increased
raw material costs for that equipment.
(C) Technological changes have increased the efficiency of oil-fired power plants.
(D) Most electricity is generated by coal-fired or nuclear, rather than oil-fired, power plants.
(E) When the price of oil increases, reserves of oil not previously worth exploiting become
economically viable.
顺便帮忙翻译一下提干好吗？谢谢了！

作者: cranberry 时间: 2003-5-10 23:42
题干的意思是：技术进步使太阳能转化为电能更经济有效了。然而太阳能的经济适用的临界价（就是每桶石油必须在这个价太阳能电站与石油发电的电站相比才会显得便宜）没变。
答案是C吗？

btw:我的电子版只有48题，你的电子版是全的吗？那里买的呢？是不是那个48元的网站？

作者: vivianQQ 时间: 2003-5-10 23:51
是啊！朋友买了，转发我的。
括号里这个意思啊？那原文没有错咯。
Thanks

作者: siebel 时间: 2003-5-11 00:09

以下是引用cranberry在2003-5-10 23:42:00的发言：
是不是那个48元的网站？

什么冬冬？would you please send me a message to show me the website? 我的电子版只有48题, too. tks.

作者: cranberry 时间: 2003-5-11 00:10
呵呵我也准备买呢，天津买不到og

作者: vivianQQ 时间: 2003-5-11 00:28
我传到网站大家下载吧！好像要新开主题啊！

作者: isa0709 时间: 2007-11-22 11:05

题干的矛盾是提高效率的太阳能为什么没有降低经济适用的临界价？我的疑惑是Ａ中油价下降和Ｃ油能效率提高都可以说无关，也可以都有关．A为什么不对呢,A也可以解释题目中的矛盾啊,A说油价下降了,Ｃ说油能提高效率了,而价格不等于效率提高,是不是这样呢?

请ＮＮ指点一下．

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