为什么非固定斜面上的物块从斜面上静止下�,支持力对物体做功? 知乎 Template




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Try and sketch some of theseMustard, Plantation, Manatee, Knitting needles, Sunflower, Breakfast, Hippo, Putter, Xylophone, Deer, view more ideas


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tomski为什么非固定斜面上的物块从斜面上静止下�,支持力对物体做功? 知乎 coloring