如图所示在用斜槽轨道做“研究平抛物体运动 的实验中1斜槽末端的切线必须是水平的这样做的目的是bb.a.保证小球飞出时速度既不太大 Template




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tomski如图所示在用斜槽轨道做“研究平抛物体运动 的实验中1斜槽末端的切线必须是水平的这样做的目的是bb.a.保证小球飞出时速度既不太大 coloring