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最大是12*1*1排列,即12個長、1個寬、1個高; n*4+2=12*4+2=50(平方釐米) 最小是3*2*2排列,即3個長、2個寬、2個高; (a*b+a*C+b*c)*2=(3*2+3*2+2*2)*2=32(平方釐米)
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