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 theseFries, Secret code, Aquarium, Clippers, Living room, Chef, Mittens, Lungs, Love letter, Widget, 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