問題詳情
【題組】10. According to the passage, the Mississippi River was
(A) one of the boundaries of a region where new agricultural settlement took place
(B) a major source of water for agricultural crops
(C) the primary route by which agricultural crops were transported
(D) a main source of power for most agricultural machinery
參考答案
答案：A
難度：簡單0.75
統計：A(3),B(1),C(0),D(0),E(0)