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?
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. 求翻译一下括号里面的内容作者: cdwayne 时间: 2011-5-5 01:27
為了讓太陽能發電比起火力更節省所要提高的油價
也就是說太陽能其實比油價還要貴的，除非油價提高(+$35)不然太陽能並不划算。作者: ashtreeliu 时间: 2011-5-5 03:08
后面的new-fired power plant表面火力发电的成本也降了 前面说solar power的成本在近几十年也降下来了