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?
Technologicalimprovements and reduced equipment costs have made converting solar energydirectly into electricity far more cost-efficient in the last decade. However, the threshold of economic viabilityfor solar power (that is, the price per barrel to which oil would have to risein order for new solar power plants to be more economical than new oil-firedpower plants) is unchanged at thirty-five dollars.
Whichof the following, if true, does most to help explain why the increasedcost-efficiency of solar power has not decreased its threshold of economicviability?
A.The cost of oil has fallen dramatically. B.The reduction in the cost of solar-power equipment has occurred despiteincreased 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 worthexploiting become economically viable.
解决矛盾题 DISCREPANCY: S-P的cost-ef 上升,但是S-P的viability threshold不变 这里的关键理解处在于viability,而stimuli中也特意括号中解释了,(oil的price would have to rise使得SP更加经济),也就是说,如果按照常理说:油价上升,sp的viability应该上升。 这样的话逻辑链就很顺了。如以下: SOLAR POWER OIL cost-Ef 上升 不晓得-----》应该是上升了 price 较低 更高 VIABILITY(考虑以上两因素) 不变 (unchanged) 不变