Before people found and utilized fossil-fuel in transportation, the energies to power vehicles are ( ).
举一反三
- Before people found and utilized fossil-fuel in transportation, the energies to power vehicles are ( ). A: Solar energies and wind B: Charcoal and coal C: The action of human muscles and wind D: Wood and coal
- Already there are many ( ) fuel vehicles on the market, powered by anything from solar power to natural gas.
- Electricity generated from hydroelectric dams and wind power is more _______ than fossil fuel generated power.
- 交通工具和设施 A: transportation vehicles B: transportation vehicles and facilities C: vehicles and facilities D: transportation and facilities
- It is predicated that existing reserves of fossil fuel ____________ by 2045.