题目

My father usually goes a walk at night. 答案：【1】for函数f (x)的图象与函数f (x) =的图象关于直线y = x对称，则f (2x x2)的单调递增区间为（  ）A．[1, +∞)                  B．         C．[1, 2)                         D．(0, 1]