Scientists are pushing known technologies to their limits in an attempt to ________ more energy from the earth.
举一反三
- Scientists are pushing known technologies to their limits in an attempt to ________more energy from the earth. A: extract B: discharge C: inject D: drain
- On Pandora corporations from earth are mining a rare mineral that is the key to solving the energy crisis on Earth.
- Why is more earth's heat blocked from escaping with more carbon dioxide in the atmosphere A: Carbon dioxide prevents the sun's energy from going back into space. B: Carbon dioxide radiates the sun's energy onto the earth. C: Carbon dioxide produces more heat in the atmosphere. D: Carbon dioxide takes in the sun's energy at infra-red wavelengths.
- To protect the environment, scientists and engineers are researching ways to ( ) electricity more cheaply from such renewable energy sources as the wind and the sun.
- refers to the return of 84% of the energy radiated from the surface of the earth.