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问题详情

搭一个正方形需要4根小棒，搭a个正方形需要（）根小棒。

A、4a

B、4+a

C、a4

时间：2022-04-23 12:37 关键词： CMS专题小学教师资格证小学教育教学知识与能力

答案解析

A

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