hei hei hei, graphite is a form of carbon

來源: selfselfself 於 2009-10-08 17:46:35 [] [舊帖] [給我悄悄話] 閱讀數 : (38 bytes)
回答: 什麽說話口氣，您比google還牛呀. 由 lilac09 於 2009-10-08 17:02:35

similarly, so is diamond and charcoal

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