一张正方形纸片的周长是8分米,把它剪成两个完全一样的长方形,每个长方形的周长是
一张正方形纸片的周长是8分米,把它剪成两个完全一样的长方形,每个长方形的周长是
数学人气:384 ℃时间:2019-10-23 06:11:17
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