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若两圆的半径分别是1cm和3cm,圆心距为4cm,则这两圆的位置关系是( ) A...
若两圆的半径分别是1cm和3cm,圆心距为4cm,则这两圆的位置关系是( )
A.内切
B.相交
C.外切
D.外离
考点分析:
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下面计算正确的是( )
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