无论是人做功还是利用机械做功都有做功快与慢的问题.如图所示的两位同学将相同的重物均从一楼搬运到三楼所用的时间不同.从图中提供的信息小红 Template




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tomski无论是人做功还是利用机械做功都有做功快与慢的问题.如图所示的两位同学将相同的重物均从一楼搬运到三楼所用的时间不同.从图中提供的信息小红 coloring