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在城市地图上,平行街道的方程为 3x + 4y = c , c 取多个值。 c = 0 与 c = 25 之间的距离?(答:5。)
在城市地图上,平行街道的方程为 3x + 4y = c , c 取多个值。 c = 0 与 c = 25 之间的距离?(答:5。)
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