問題詳情
【題組】49. What is the second paragraph mainly about?
(A) How Tornado Alley is formed.
(B) The measure employed to protect Tornado Alley.
(C) The contrast between the past and modern ways to research on tornados.
(D) A new project to investigate the fundamental factors that lead to tornados.
參考答案
答案：D
難度：適中0.666667
統計：A(0),B(1),C(1),D(4),E(0)