問題詳情

24.It can be inferred that railroad refrigerator cars came into use
(A)before 1860
(B)before 1890
(C)after 1900
(D)after 1920

參考答案

答案:B
難度:非常簡單1
統計:A(0),B(3),C(0),D(0),E(0)

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