以下几种情况中力对物体做功的有 A.人用力提杠铃没有提起来b.用力提着水桶水平移动2m水桶离地面高度不变c.沿着斜面把汽油桶推上 Template




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tomski以下几种情况中力对物体做功的有 a.人用力提杠铃没有提起来b.用力提着水桶水平移动2m水桶离地面高度不变c.沿着斜面把汽油桶推上 coloring