如图甲是小明设计的“空气浮力演示器”:将一空心�属球与配重通过细线悬挂在定�轮上,调节配重质量使二者保持静止,用气泵往玻璃容器内缓慢压人空气 Template


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tomski如图甲是小明设计的“空气浮力演示器”:将一空心�属球与配重通过细线悬挂在定�轮上,调节配重质量使二者保持静止,用气泵往玻璃容器内缓慢压人空气 coloring