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  3. All the useful energy at the surface of the earth comes from the activity of the sun. The sun heats and feeds creatures and mank

All the useful energy at the surface of the earth comes from the activity of the sun. The sun heats and feeds creatures and mank

admin2018-02-03  99
问题     All the useful energy at the surface of the earth comes from the activity of the sun. The sun heats and feeds creatures and mankind. Each year it provides men with two hundred million tons of grain and nearly ten million tons of wood, 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 fails 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 ______
选项 A、gasoline
B、natural gas
C、atomic power
D、animal fat
答案C
解析 事实细节题。文章前半部分提到地球上所有的能量来源都离不开太阳，比如地球上的一切动植物，人类，树木，煤矿，石油，天然气，其他燃料等，但是没有提到C“原子能”，所以选C。
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