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,第五章机械能及其守恒定律,章末热点集训,第五章 机械能及其守恒定律,1/30,2/30,3/30,4/30,x,/m,120,160,200,240,280,320,360,400,v,/(ms,1,),14.5,16.5,18.0,19.0,19.7,20.0,20.0,20.0,5/30,6/30,7/30,8/30,9/30,10/30,11/30,12/30,13/30,14/30,15/30,16/30,17/30,18/30,19/30,20/30,21/30,22/30,23/30,24/30,25/30,26/30,27/30,28/30,29/30,30/30,
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