有一个棱长3厘米的正方体,一只小虫从顶点a出发沿棱爬行,如果不走重复路线,小虫回到a点,最多爬()厘米
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![有一个棱长3厘米的正方体,一只小虫从顶点a出发沿棱爬行,如果不走重复路线,小虫回到a点,最多爬()厘米](/uploads/image/z/5056964-44-4.jpg?t=%E6%9C%89%E4%B8%80%E4%B8%AA%E6%A3%B1%E9%95%BF3%E5%8E%98%E7%B1%B3%E7%9A%84%E6%AD%A3%E6%96%B9%E4%BD%93%2C%E4%B8%80%E5%8F%AA%E5%B0%8F%E8%99%AB%E4%BB%8E%E9%A1%B6%E7%82%B9a%E5%87%BA%E5%8F%91%E6%B2%BF%E6%A3%B1%E7%88%AC%E8%A1%8C%2C%E5%A6%82%E6%9E%9C%E4%B8%8D%E8%B5%B0%E9%87%8D%E5%A4%8D%E8%B7%AF%E7%BA%BF%2C%E5%B0%8F%E8%99%AB%E5%9B%9E%E5%88%B0a%E7%82%B9%2C%E6%9C%80%E5%A4%9A%E7%88%AC%EF%BC%88%EF%BC%89%E5%8E%98%E7%B1%B3)
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