举一反三
- Without greenhouse gases, the heat radiated from the Earth's surface<br/>would____. A: remain where it is B: warm up the Earth C: escape to space
- On Pandora corporations from earth are mining a rare mineral that is the key to solving the energy crisis on Earth.
- A body weighs less the farther it gets from the surface of the Earth.( )
- Of the sun’ s total output of radiant energy, the earth receives （） A: one tenth B: one millionth C: all that comes from the surface of the sun D: a very small portion
- _____ is covered with heavy snow. A: The earth’s surface B: The surface of earth C: The surface earth D: The earth surface
内容
- 0
Scientists are pushing known technologies to their limits in an attempt to ________ more energy from the earth.
- 1
The total amount of energy received per minute by the whole earth is a great sum, but it is only a tiny fraction of the total energy radiated by sun. A: sent in B: sent for C: sent out D: sent up
- 2
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.
- 3
______ is covered with heavy snow. A: The surface of earth B: The earth’s surface C: The earths’ surface D: The surface
- 4
A body weighs less ______ it gets from the surface of the earth. A: far B: farther C: the farther D: the farthest