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能導電的非金屬-石墨,Conductive non-metallic elements - graphite

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Published on Feb 14, 2013

能導電的非金屬-石墨
我們在用的自動鉛筆筆芯就是石墨跟黏土混和做成的。
在兩端通以電流電流的時候,就會看見筆芯因為通電而放處高溫及強光。

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