math01 动画演示 华南理工大学理学院应用数学系
回答: Vector01 功是度量能量转换的基本物理量,它描写了力对空间的积累效应。单位为J (焦耳)。 空间某点的势能Ep在数值上等于
由 marketreflections
于 2011-12-13 15:35:31
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