Theoldestandmostcommonsource(來源)ofrenewableenergyknownt...
問題詳情：Theoldestandmostcommonsource(來源)ofrenewableenergyknowntoman,biomassisoneofthemostimportantformsenergyproductionintheUnitedStatesandelsewhere.Sincesuchawidevarietyofbiomassmaterialsiseverywhe...