Before 1949, there were about 23,500 kilometers railway constructed and were all in service._精华吧

Before 1949, there were about 23,500 kilometers railway constructed and were all in service.

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Before 1949, there were about 23,500 kilometers railway constructed and were all in service.

A.正确

B.错误

正确答案：错误

Tag：中外铁路文化之旅时间：2022-01-14 21:30:13

上一篇：Since the Third Plenary Session in 1978, the railway electrification process had accelerated slowly.
下一篇：The whole construction project of Chengyu Railway was under the extremely difficult condition of lacking mechanical equipments.

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