中国大学MOOC: There are various obstacles to overcome when we try to tap rich renewable energy sources.
举一反三
- It is the losses caused by friction that we must try to overcome by various means.
- Our energy needs will have to be fulfilled from ( ) A: depletable energy sources B: renewable energy sources C: the existing energy D: recycling energy
- “The essay is to examine potential renewable energy sources.” -- This sentence serves as the background of the essay.
- 中国大学MOOC: Fats are important energy sources.
- 中国大学MOOC: Due to the development of renewable energy technology, the coming energy crisis is not so severe as expected, so we dont need to work out the solutions in haste.