如图所示的实验中一个用线悬挂的小球在ac间�动小球从b��c的过程中小球的动能 重力势能 .填“增大 “减小 或“不变 ——青 Template




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tomski如图所示的实验中一个用线悬挂的小球在ac间�动小球从b��c的过程中小球的动能 重力势能 .填“增大 coloring