M:x^2+y^2-2mx^2+y^2=4x-2ny+m^2-1=0N: x^2+y^2+2x+2y-2=0 肯定是这样李神的,,哪谈亏相信我侍卜吧
M:x^2+y^2-2mx^2+y^2=4x-2ny+m^2-1=0N: x^2+y^2+2x+2y-2=0