一百年也更新换代不了一回的东西,还是运营成本更重要吧?人口密度极高的地方,高铁能赚钱
回答: 高铁和航空的一个区别是upgrade的难易和成本。高铁要upgrade很困难,不仅要upgrade列车,也要upgrade全线
由 Porcelana
于 2018-07-01 20:23:39
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