中国大学MOOC: Renewable energies are not competitive with fossil fuels in consideration of health and environmental cost.
举一反三
- People are beginning to use clean energy sources mainly because _______. A: fossil fuels have caused a lot of pollution B: clean energy is cheap C: fossil fuels have cost a lot of lives D: they do not have enough fossil fuels now
- 中国大学MOOC: We have to prepare for a new age of energy synthesis since fossil fuels will be eventually depleted.
- Which of the following belongs to the environmental impact associated with "input" A: Ozone depletion B: Depletion of fossil fuels C: Acid rain D: Toxicity in human beings
- 中国大学MOOC: A profit-maximizing firm in a competitive market will increase production when average revenue exceeds marginal cost.
- If, in long run equilibrium, the competitive price of some good is $16.67, then, for each and every firm in the industry, A: marginal cost > average cost = $16.67. B: marginal cost < average cost = $16.67. C: $16.67 = marginal cost = average cost. D: $16.67 = marginal cost > average cost.