1 米 钢管重量是：
4 / 1.4 = 2.857 kg
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一个钢管1.4米长,重4kg.请问1米钢管重量是多少?
一个钢管1.4米长,重4kg.请问1米钢管重量是多少?
数学人气：164 ℃时间：2020-03-26 03:57:55
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