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(3,1),点 (3,3),则线段AB的中点坐标是( ). (A.)(2,3) (B.)(3,2) ( )(6,2) ( )(6,4)
(2,-3) (-3,-3) (2,3) (-4,6)
(-2,3) (-1,2) (0,4) (4,4)
(2,-3) (-3,-3) (2,3) (-4,6)
区间[1,2]和[2,3] 区间[2,3]和[3,4] 区间[2,3]和[3,4]和[4,5] 区间[3,4]和[4,5]和[5,6]
(5,6) (2,3) (-5,6) (-2,3)
(1,2)和(2,3) (2,3)和(-4,6)
(-2,3)和(4,-6) (2,-3)和(-4,-6)
(2,3) (﹣6,3) (﹣2,7) (﹣2.﹣1)
(2,3) (2,3)∪(3,6) (2,6) (2,4)∪(4,6)
(2,﹣3),(﹣4,6) (﹣2,3),(4,6) (﹣2,﹣3),(4,﹣6) (2,3),(﹣4,6)
(1,7,3) (﹣1,﹣7,3) (1,﹣2,3) (2,5,6)
(﹣2,7) (2,3) (2,3)或(﹣6,3) (﹣2,7)或(﹣2,﹣1)
(2,7) (6,3) (﹣2,3) (2,﹣1)
(2,3) (-2,3) (-2,-3) (2,-3)
(2,-3),(-4,6) (-2,3),(4,6) (-2,-3),(4,-6) (2,3),(-4,6)
(﹣2,3)关于y轴对称的点A.′的坐标是( ) A.(-2,6) (2,3) (-2,-3) (2,-3)