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化工熱力學
Aug 19th 2013, 09:26

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第一定律說能量不會被創造和毀滅,為什麼還會出現能源危機而且要保存能源, 請用第二定律為基礎解釋...
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    newhong

    2016韓國代購網 , 韓國代購化妝品 , 韓國代購批發 , 韓國代購教學---韓國代購/追加/寄貨

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