The2,298-kilometerBeijing-GuangzhouHigh-speedRailway
問題詳情：The2,298-kilometerBeijing-GuangzhouHigh-speedRailway___41___(official)openedtopassengersonDecember26，2012.Itistheworld’slongesthigh-speedrailroute.The___42___(design)speedofthetrackis350kilome...