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| 送交者: 車五進二 2019月11月18日12:26:25 於 [靈機一動] 發送悄悄話 |
| 回 答: 俺西醫外科半輩子，見癌症病人成千上萬，未見一例中醫治療有效的 由 北美朋友 於 2019-11-18 08:56:13 |
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The cross section of the paper makes a spiral, we can appoximate it to be many layers of circles. The inner most layer has a radius 1+4/600 while the outer most layer has a radius of 5, therefore the radii make a arithemetic sequence. |
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