(x-a)^2+(y-b)^2=r^2 椭圆:x^2/a^2+y^2/b^2=1(x轴)(a>b>0) x^2/b^2+y^2/a^2=1(y轴)(a>b>0) e=c/a(0
(x-a)^2+(y-b)^2=r^2椭圆:x^2/a^2+y^2/b^2=1(x轴)(a>b>0)x^2/b^2+y^2/a^2=1(y轴)(a>b>0)e=c/a(0
(x-a)^2+(y-b)^2=r^2 椭圆:x^2/a^2+y^2/b^2=1(x轴)(a>b>0) x^2/b^2+y^2/a^2=1(y轴)(a>b>0) e=c/a(0
(x-a)^2+(y-b)^2=r^2椭圆:x^2/a^2+y^2/b^2=1(x轴)(a>b>0)x^2/b^2+y^2/a^2=1(y轴)(a>b>0)e=c/a(0
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