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[大纲要求](1)理解质量的概念及其特性.(2)掌握密度的概念,会用公式ρ=m/V及其变式.(3)了解天平的称量和感量,会使用托盘天平和物理天平.
[Outline requirements] (1) Understand the concept of quality and its characteristics. (2) Grasp the concept of density, and use the formula ρ=m/V and its variants. (3) Understand the balance’s weighing and sense, and use it. Pallet balance and physical balance.