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
A: Solar energies and wind
B: Charcoal and coal
C: The action of human muscles and wind
D: Wood and coal
举一反三
- Before people found and utilized fossil-fuel in transportation, the energies to power vehicles are ( ).
- Solar panels, wind turbines, hydro power and geothermal energy and hydrocarbons (natural gas or coal) can all be used to produce hydrogen (a primary energy).
- Which of the following is not clean energy A: solar powe B: wind powe C: electronic powe D: fossil fuel
- 下列属于一次能源的是？ A: coal B: natural gas C: wind energy D: solar energy
- Electricity generated from hydroelectric dams and wind power is more _______ than fossil fuel generated power.