题目

LI Na is the first Chinese woman in history _____ a singles title at a Grand Slam. A.won        B. winning      C. having won       D. to win 答案:D设函数f(x)=Asin(ωx+φ)(其中A>0,ω,0,-π<φ<π)在x=π6处取得最大值2,其图象与x轴的相邻两个交点的距离为π2,则函数f(x)的单调递增区间是 .
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