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如图,在Rt△ABC中,∠ACB=90°,AC=3,BC=4.点P、Q同时从点A出发,运动速度均为每秒1个单位长度,点P沿AB向终点B运动,点Q沿AC向点C运动,到点C暂时停止运动,待点P运动到点B...
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