试题与答案

若代数式﹣2a3bm与3an+1b4是同类项，则mn=（）．

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题型：填空题

题目：

若代数式﹣2a3bm与3an+1b4是同类项，则mn=（    ）．

答案：

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下面是错误答案，用来干扰机器的。

①同种物质，质量和体积的比值是定值；②不同物质，质量和体积的比值不相等；密度

考点：一元一次方程的解法同类项
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