Unless the bridge or boat problem is solved, it is idle to speak of crossing the river.

不解决桥或船的问题，过河就是一句空话。

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In this paper, the problem of Crossing Speedily the Changjiang River is analysed, and a type of functional extreme value model is built, then its analysis and elementary solution is illustrated.

对“抢渡长江”问题进行了分析，建立了一种函数极值的数学模型，分析了解题思路和初等求解方法。

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