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如图所示,菱形ABCD中,对角线AC,BD相交于点O,若再补充一个条件能使菱形A...
如图所示,菱形ABCD中,对角线AC,BD相交于点O,若再补充一个条件能使菱形ABCD成为正方形,则这个条件是
.(只填一个条件即可,答案不唯一)
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