如图所示劲度系数为k的轻质弹簧上端悬挂在天花板上下端连接一个质量为m的物体aa下面用细线悬挂一质量为m的物体b此时系统处于静止状态.现 Template




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sketch #3260 sorry to over comment on your blog .haha. I 'm just flnpiipg through your posts after finding you through the KCWC. Recently I had this huge urge to learn to sketch with black ink pens. This cloud drawing is exactly the thing that I feel the need to put on paper. : )


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tomski如图所示劲度系数为k的轻质弹簧上端悬挂在天花板上下端连接一个质量为m的物体aa下面用细线悬挂一质量为m的物体b此时系统处于静止状态.现 coloring