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Originally posted by oscar at 2005-5-22 05:31 PM: 石墨英文就是graphite
Originally posted by 紅唇娃 at 2005-5-22 16:53: 有少量graphite. 個名就叫石墨<--唔知英文係咩
Originally posted by oscar at 2005-5-22 10:59 AM: 其實pencil支蕊應該唔會係純graphite 如果係純graphite就會好易斷...
Originally posted by 紅唇娃 at 2005-5-22 01:51: 但係D木夾住D lead 呀ma. 我聽ge聞係咁 當然﹐現代ge pencil係Graphite類物體 (亦係聽返來)
Originally posted by fish at 2005-5-21 03:35 PM: 鉛筆以前是用2 pics of wood夾住來用的...但易break...<小學時teacher所說的(謊言?)> 好果係Pb....有咁易咩=.=||? 但你們可以try try...burn支芯...係flameable ga~
Originally posted by 紅唇娃 at 2005-5-19 11:19 PM: 印象中﹐鉛筆好耐以前係用鉛做...
Originally posted by oscar at 2005-5-20 06:13 PM: 我睇過一d科學書,話古時既人成日將好多個元素搞亂左 好似錫、銀、鐵...佢地既顏色好相似 所以我估個答案就係: 古時既中國人用鋁黎做錫紙,d人見d錫紙既顏色似錫,所以就叫錫紙。 但係西方人就聰明地搵出錫紙 ...
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