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题目已知曲线C1:|x|/a+|y|/b=1(a>b>0)所围成的封闭图形的面积为45,曲线C1的内切圆半径为235,记C2为以曲线C1与坐标轴的交点为顶点的椭圆.(Ⅰ)求椭圆C2的标准方程;(Ⅱ)设AB是过椭圆C2中心的任意弦,l是线段AB的垂直平分线,M是l上异于椭圆中心的点.
The area of the closed graph surrounded by the known curve C1:|x|/a+|y|/b=1 (a>b>0) is 45, the radius of the inscribed circle of the curve C1 is 235, and the value of C2 is The intersection point of the curve C1 and the coordinate axis is the ellipse of the vertex. (I) Find the standard equation of the ellipse C2; (II) Let AB be any string that passes over the center of the ellipse C2, l is the vertical bisector of the line segment AB, and M is the difference between l At the center of the ellipse.