如图所示同一物体沿着倾角不同的光�斜面ab和ac分别下�如果都在a点由静止开始一直�到底端a.两次运动重力对物体做的功相同b.�到底端 Template




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tomski如图所示同一物体沿着倾角不同的光�斜面ab和ac分别下�如果都在a点由静止开始一直�到底端a.两次运动重力对物体做的功相同b.�到底端 coloring