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搬运砖头的独轮车的有关尺寸如图所示，车箱和砖头总重G=1000N，推车时，人手向上的力F= N，使用它可以 （选填“省力”或“省距离”）．
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教案备课库《2017年江苏省淮安市中考物理模拟试卷》真题及答案
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