It was believed that there was no limit ______ the energy resources on our earth.
A: for
B: off
C: to
D: on
A: for
B: off
C: to
D: on
举一反三
- The sun basically provides Earth with_____ source of energy everyday. (limit)
- ( ) the earth to be flat, many feared that Columbus would fall off the edge of the earth.
- On Pandora corporations from earth are mining a rare mineral that is the key to solving the energy crisis on Earth.
- How much energy given off by the sun reaches the earth A: 100 % but indirectly B: 5 % C: 50 % D: only a very tiny amount
- Geothermal energy is thermal energy ______ and stored in the Earth. A: exploded B: generated C: exterminated D: devastated