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能判定一个四边形是菱形的条件是( ) A.对角线相等且互相垂直 B.对角线相等且...
能判定一个四边形是菱形的条件是( )
A.对角线相等且互相垂直
B.对角线相等且互相平分
C.对角线互相垂直
D.对角线互相垂直平分
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