8. What percentage of the energy in coal in the ground reaches the home?
(A)10
(B)25
(C)90
(D)213
答案:登入後查看
統計: 尚無統計資料
統計: 尚無統計資料
8. What percentage of the energy in coal in the ground reaches the home?
(A)10
(B)25
(C)90
(D)213