長為L的磚四塊,堆積如右圖所示。求此系統在平衡下,最大伸出量時,圖中各x值為多少?
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長為L的磚四塊,堆積如右圖所示。求此系統在平衡下,最大伸出量時,圖中各x值為多少?
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By admin – 2010 年 09 月 28 日
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