人在高h的地方斜上抛出一质量为m的物体物体到最高点时的速度为v1落地速度为v2不计空气阻力则人对这个物体做的功为 A.12mv Template




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tomski人在高h的地方斜上抛出一质量为m的物体物体到最高点时的速度为v1落地速度为v2不计空气阻力则人对这个物体做的功为 a.12mv coloring