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八年级物理全册9.3物体的浮与沉（第2课时浮沉条件的应用）习题课件（新版）沪科版.ppt

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第九章 浮力,第三节 物体的浮与沉,第2课时 浮沉条件的应用,二力平衡,相同,自身重力,下潜,压缩空气,孔明灯,上升,B,D,D,3105,3104,0.1,0.1,去掉适量的铁丝,

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