vanstone

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习惯与物理
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绪论
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机械能及其转化
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动能和势能
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摩擦力
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质量
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功率
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液面升降问题
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滑轮（二）
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滑轮（一）
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透镜
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实验 观察水的沸腾
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流体压强和流速
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光的直线传播
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光的反射
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机械运动
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运动的快慢
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平面镜成像
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物体的浮沉条件及应用
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质量
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