問題詳情
【題組】50. The second paragraph is mainly about ______________.
(A) nuclear power plants
(B) using sunlight to prevent accidents
(C) protecting the natural environment
(D) a new source of electrical energy
參考答案
答案：D
難度：適中0.464286
統計：A(4),B(6),C(3),D(13),E(0)