问答题

在公元前5世纪春秋末期，首先在江苏扬州附近开凿了一条运河，把长江的水引向北面。这条运河最初在公元7世纪隋朝时期得到扩长，最后在公元13世纪被修成了今天的大运河。大运河在元、明、清三代是中国南北运输的大动脉，为南北经济和文化的交流做出了巨大的贡献。由于南北海运的发展和19世纪中期天津至浦口和北京至汉口铁路的开通，大运河的作用被大大地削弱了，很多地段荒废了和被泥沙堵塞了。在新中国成立后，大运河又焕发了生机。除山东地段只能部分通航之外，大运河很多其他的地段在一些季节能通航，从江苏至浙江的800千米地段能全年通航。

【参考答案】

正确答案：In the late Spring and Autumn Period in the 5th century......

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