二月讨论群找到的某CR 考古

stellang

希望对大家有帮助.
答案选C
17. 两种治病还是做手术之类的时候用的东西，一个传统的，一个电子的，说电子的比传统的便宜，且恢复的时间变短，但人们还是会选择传统的，问解释？
我选的人们认为医生有操作实际经验比有理论，更能减少时间

[attachimg=365,606]84820[/attachimg]

stellang

又发现一个 CR JJ考古~感谢 2月讨论群~

14.太阳能电力的成本太贵,却无法降低成本,所以不可能转换成太阳能电力的原因.问支持.
考古
答案C
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?

(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.

sjsxshq

群号多少啊？

elaine2011

强大哦~~谢谢分享~~