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3根同样长的小棒,能否摆成一个三角形?它是什么三角形?4根呢?5根呢? 6根呢?(只回答一个问题的不采纳,要说明原因)
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3根同样长的小棒,能否摆成一个三角形?它是什么三角形?4根呢?5根呢? 6根呢?(只回答一个问题的不采纳,要说明原因)...
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