-- ____ do you play chess?
-- I play at least twice a week.
A:How much
B:How often
C:How long
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在极坐标系中,已知圆C的圆心C(2,π4),半径r=3.
(Ⅰ)求圆C的极坐标方程;
(Ⅱ)若α∈0,π4),直线l的参数方程为x=2+tcosαy=2+tsinα(t为参数),直线l交圆C于A、B两点,求弦长|AB|的取值范围.