题目内容
（请给出正确答案）
Radiant energy is stored as carbon compounds by ______.
A．plants
B．rain
C．coal, oil, and natural gas
D．inflammable substances
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更多“Radiant energy is stored as ca…”相关的问题
Radiant energy is stored as carbon compounds by______.
A．plants
B．water
C．rock
D．creatures
Plants receive radiant energy from the sun and () it into chemical energy in the form. of food.
A、divide
B、convert
C、release
D、convey
A.plants
B.water
C.rock
D.creatures
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
Why may the repair process of the DNA finally fail？
A．Because shortwave radiant energy breaks the strands of the DNA.
B．Because the DNA may produce a colony of cancer cells.
C．Because enzymes work to rearrange the DNA into a new order.
D．Because the patient is exposed to UV from time to time.
Why does the repair process of the DNA may finally fail？
A．Because short-wave radiant energy breaks the strands of the DNＡ.
B．Because the DNA may produce a colony of cancer cells.
C．Because enzymes work to rearrange the DNA into a new order.
D．Because the patient is exposed to UV form. time to time.
A.one tenth
B.one millionth
C.all that comes from the surface of the sun
D.a very small portion
Coal, oil, natural gas, and all other fuels are stored-up energy from the sun. Some was collect ed by this season's plants as carbon compounds. Some was stored by plants and trees ages ago.
Even waterpower derives from the sun. Water turned into vapor by the sun falls as rain. It courses down the mountains and is converted to electric power.
Light transmits only the energy that comes from the sun' s outer layers, and much of this energy that is directed toward the earth never arrives. About nine-tenths of it is absorbed by the atmosphere of the earth. In fact; the earth itself gets only one half-billionth of the sun' s entire output of radiant energy.
All the useful energy at the surface of the earth comes ______.
A．directly from the sun
B．from the sun' s activity
C．from energy stored by the sun
D．from radiation of the sun
Coal, oil, natural gas, and all other fuels are stored energy from the sun. Some was collected by this season's plants as carbon compounds. Some was stored by plants and trees ages ago. Even waterpower derives from the sun. Water turned into vapor by the sun falls as rain. It courses down the mountains and is converted to electric power. Light transmits only the energy that comes from the sun's outer layer, and much of this energy that is directed towards the earth never arrives. About nine tenths of it is absorbed by the atmosphere of the earth. In fact, the earth itself gets only one half millionth of the sun's entire output of radiant energy.
The sun is the source of all of the following EXCEPT______.
A．gasoline
B．natural gas
C．atomic power
D．animal fat
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