题目将函数 (x)=sin (omega x+dfrac (pi )(3))(omega gt 0) 的图象向左平移 dfrac (pi )(2) 个-|||-单位长度后得到曲线C,若C关于y轴对称,则w的最小值-|||-是 ()-|||-A. dfrac (1)(6) B. dfrac (1)(4)-|||-C. dfrac (1)(3) D. dfrac (1)(2)题目解答答案