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已知⊙O1的半径为3cm,⊙O2的半径为4cm,两圆的圆心距O1O2为7cm,则...
已知⊙O1的半径为3cm,⊙O2的半径为4cm,两圆的圆心距O1O2为7cm,则⊙O1与⊙O2的位置关系是 .
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