A policy is cost-effective if:
A. it achieves a given amount of environmental improvement at the least possible cost.
B. it achieves a given amount of environmental improvement at the highest possible cost.
C. it achieves a low amount of environmental improvement at the least possible cost
D. none of the answers are corect.
查看答案
Incentives for technological innovations cause:
A. shifts the marginal abatement cost function downward
B. new inventions become public goods
C. encourage new technology
D. All answers are correct.
下列各物理量中，为状态函数的是.........
A. △U
B. U
C. Q
D. W
已知298K时△fHmΘ(Fe3O4，s)=-1118.0kJ·mol-1，△fHmΘ(H2O，g)=-241.8kJ·mol-1，则反应Fe3O4(s)+4H2(g)→3Fe(s)+4H2O(g)的△rHmΘ=..........
A. -150.8 kJ·mol-1
B. 150.8 kJ·mol-1；
C. 876.2 kJ·mol-1
D. - 876.2 kJ·mol-1
已知在相同温度下，金刚石和石墨与O2(g)反应生成1.0molCO2(g)的反应热分别为-395.4kJ·mol-1和-393.5kJ·mol-1，则C(石墨)→C(金刚石)的反应热为——
A. 1.9kJ·mol-1
B. -1.9kJ·mol-1
C. 38kJ·mol-1
D. -38 kJ·mol-1
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