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标题: new jj, ball [打印本页]

作者: rushcynthia    时间: 2003-1-10 16:17     标题: new jj, ball

有个球落到地上,回弹3/4。 共弹了14**厘米,问第三次落下的高度是多少

there should be a condition defining how many times the ball has bounced when it bouncing 14**cm,right?
作者: tongxun    时间: 2003-1-10 18:31

对。




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