41. Beginning in the mid-sixteenth century, local _________ around the
world served as a means of conveying coal and iron ore from mines to
low-lying coastal areas.
(A)boats
(B) railroad
(C) trolley
(D) wooden cart
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統計: A(34), B(116), C(22), D(14), E(0) #1564480
統計: A(34), B(116), C(22), D(14), E(0) #1564480