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的坐标为(9,6),AB⊥y轴,垂足为 ,点P.从原点O.出发向x轴正方向运动,同时,点Q.从点A.出发向点B.运动,当点Q.到达点B.时,点P.、Q.同时停止运动,若点P.与点Q.的速度之比为1:2,则下列说法正确的是( ) A.线段PQ始终经过点(2,3) B.线段PQ始终经过点(3,2) 线段PQ始终经过点(2,2) 线段PQ不可能始终经过某一定点
(2,4) (-2,-4) (-4,2) (4,-2)
(2,-3) (-3,-3) (2,3) (-4,6)
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8 s 4 s 14 s 16s
(1,2) (-1,-2) (2,-1) (1,-2)
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