If a boat's speed in the still water is 5m/s,and the speed o
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If a boat's speed in the still water is 5m/s,and the speed of water in a river is 3m/s.How can
继续.we cross the river in the shortest time?And how about the shortest distance?Draw the diagrams.
继续.we cross the river in the shortest time?And how about the shortest distance?Draw the diagrams.
是翻译还是要画图呢?画图姐姐不擅长了
如果船在静水的速度是5米/秒,水速是3米/秒,怎样用最短时间过河?又怎样行走最短的距离,画图
再问: 额...是画图...
如果船在静水的速度是5米/秒,水速是3米/秒,怎样用最短时间过河?又怎样行走最短的距离,画图
再问: 额...是画图...
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