What challenges did the development of railroads in China face in the early 20th century?( )
A、Naturaldisastersandlackofresources.
B、Politicalinstability,wars,andforeignoccupation.
C、Technologicaladvancementsandeconomicsupport.
D、Excessivefundingandrapidconstruction.
发布时间:2025-08-08 17:27:05