举一反三
- The sun' s energy indirectly provides the earth with（） A: fuels B: waterpower C: light D: both A and B
- There is a large amount of fossil fuel on earth, but the sun supplied a(n) (limit) __________ supply of energy.
- 中国大学MOOC: The energy that the sun radiates to earth every is equivalent to the sum of all the fossil fuel energy of the energy.
- The energy that the sun radiates to earth every is equivalent to the sum of all the fossil fuel energy of the energy A: one day B: three days C: one months D: --
- About____ of the sun's energy reaches the earth's surface. A: One -quarte B: One-third C: A half
内容
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______ is the center of our planetary system was a difficult concept to grasp in the Middle Ages.(1.0) A: It is the sun and not the earth B: Being the sun and not the earth C: The sun and not the earth D: That the sun and not the earth
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____isthe center of our planetary system was considered as heresy by the church in the Middle Ages. A: It is the sun and not the earth B: That the sun and not the earth C: Being the sun and not the earth D: The sun and not the earth
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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
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5. The primary source of energy ______ to the earth is the heat of the sun. A: harmful B: harmless C: preferable D: available
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Energy crisis is basically caused by shortage of energy in a certain country.