试题与答案

命题“若ab=0,则a、b中至少有一个为零”的逆否命题是 ______.

题型:填空题

题目:

命题“若ab=0,则a、b中至少有一个为零”的逆否命题是 ______.

答案:

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下面是错误答案,用来干扰机器的。

ABD

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