As there is less and less coal and oil, scientists are exploring new ways of making use of _______ energy, such as sunlight, wind and water for power and fuel.
Aprimary
Balternative
Cinstant
Dunique
相关试题
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As there is less and less coal and oil, scientists are exploring new ways of making use of _______ e
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es.Coal is still used,mostly in power stations,to cover one一quarter of our energy needs,but it is th
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tion,when energy-dense coal became the fuel of choice. Coal is still used,mostly in power sta-tions
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tion,when energy-dense coal became the fuel of choice. Coal is still used,mostly in power sta-tions
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es.Coal is still used,mostly in power stations,to cover one一quarter of our energy needs,but it is th