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OG邏輯題...救命啊!og-153
請各位幫幫我解一下OG#153.我寫問(E)如何解釋?
#153
Technological improvement 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 plats 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?
(C) Technological changes have increased the efficiency of oil -fired power plants.
(E) When the price of oil increases, reserves of oil not previously worth exploiting become economically viable.
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发表于 2003-10-26 21:29:00
