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【简答题】
小明从O出发,先走2米,到达A点,再走5米到达B点,又走6米到达C点,最后走8米到达D点.若规定为正,为负,试在下面的直线上标出ABCD四个点的位置,幷说出D点在O点的什么方向?与O点的距离是多少?
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