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如下图所示,有一个4米高的台阶,左边是10级,右边是5级,王宁从左边、李明从右边同时向上登,比赛谁先爬
As shown below, there is a 4-meter-high steps, the left is 10, the right is 5, Wang Ning from the left, Li Ming at the same time from the right up, the game who climb first