如图所示一直角斜面固定在水平地面上右边斜面倾角为60°左边斜面倾角为30°ab两物体分别系于一根跨过定�轮的轻绳两端置于两斜面上 Template




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anonymous
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anonymous
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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. : )


anonymous
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tomski如图所示一直角斜面固定在水平地面上右边斜面倾角为60°左边斜面倾角为30°ab两物体分别系于一根跨过定�轮的轻绳两端置于两斜面上 coloring