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

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統計： A(0), B(16), C(1), D(4), E(0) #803062

詳解 (共 1 筆)

#7506237
Thus, by the 1890's,...
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