高等教育 / 新发展英语综合教程（二）
This passage centers mainly on _ _ _ _ _ _ _ _ .
A、harnessing energy through chemistry
B、our last source of power
C、how water power is produced
D、the amount of solar energy that can be utilized
A、harnessing energy through chemistry
B、our last source of power
C、how water power is produced
D、the amount of solar energy that can be utilized
参考答案：
佳题速递：