The first railroad to cross the entire country of the US was completed in Utah in _________.
The first railroad to cross the entire country of the US was completed in Utah in _________.
A、1865
B、1869
C、1870
D、1893
【正确答案】：B
【题目解析】：第一条横穿美国全境的铁路于1869年在犹他州建成。
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