题目

Carla, curled up on the sofa, was smoking a cigarette and (stroke) her cat. 答案:【1】stroking已知函数f(x)=2sin(ωx+φ)(φ>0,|φ|<π2)的部分图象如图所示,则φ的值为       (  ) A、-π4B、π4C、-π8D、π8
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