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  3. Solar power is one kind of clean energies that are forms of energy which do

Solar power is one kind of clean energies that are forms of energy which do

游客2024-02-19  71
问题     Solar power is one kind of clean energies that are forms of energy which do not pollute the air, the ground, or the sea. It【B1】______a number of methods of producing energy from the light of the Sun. For example, solar power is produced by collecting sunlight and【B2】______it into electricity. It has been present in many【B3】______ building methods for centuries, but has become of【B4】______interest in developed countries as the environmental costs and limited【B5】______of other power sources such as fossil fuels are realized. It is already in widespread use where other supplies of power are absent such as in remote【B6】______and in space.
    As the Earth orbits the Sun, it receives【B7】______1,400 watts per square meter of energy, as 【B8】______upon a surface kept normal at a right angle to the Sun. This number is referred to as the solar constant. Of the energy received, roughly 19% is absorbed by the atmosphere,【B9】______. The generally accepted standard is 1,020 watts per square meter at sea level.
     【B10】______. Plants use solar energy to create chemical energy through photosynthesis (光合作用).【B11】______. [br] 【B10】
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答案 After passing through the Earth’s atmosphere, most of the sun’s energy is in the form of visible light
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