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回复 爪机专用 回个都看得懂的 取$AD,BD$中点$M,N$,连接$MF,MN,ME,EN$,有$NF=NM=NE=MF=\dfrac1{ ... 乌贼 发表于 2014-9-25 02:08
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回复 乌贼 就是要这效果 爪机专用 发表于 2014-9-23 15:33
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