TheopeningoftheBeijing—Zhangjiakouhigh-speedrailwayt...
問題詳情： TheopeningoftheBeijing—Zhangjiakouhigh-speedrailwaytookplaceinDecember,2019.TherailwayisamilestoneinChina’srailwaydevelopmentbecauseithasusedthelatesttechnologiesinrailwaybuilding.Ther...