两匹马各用1200N的力沿完全相反的方向拉一弹簧测力计并使其保持精致,则此时测力计的读书为( )A.2400NB.1200NC.0ND.600N———————————————————————————————
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![两匹马各用1200N的力沿完全相反的方向拉一弹簧测力计并使其保持精致,则此时测力计的读书为( )A.2400NB.1200NC.0ND.600N———————————————————————————————](/uploads/image/z/3828410-26-0.jpg?t=%E4%B8%A4%E5%8C%B9%E9%A9%AC%E5%90%84%E7%94%A81200N%E7%9A%84%E5%8A%9B%E6%B2%BF%E5%AE%8C%E5%85%A8%E7%9B%B8%E5%8F%8D%E7%9A%84%E6%96%B9%E5%90%91%E6%8B%89%E4%B8%80%E5%BC%B9%E7%B0%A7%E6%B5%8B%E5%8A%9B%E8%AE%A1%E5%B9%B6%E4%BD%BF%E5%85%B6%E4%BF%9D%E6%8C%81%E7%B2%BE%E8%87%B4%EF%BC%8C%E5%88%99%E6%AD%A4%E6%97%B6%E6%B5%8B%E5%8A%9B%E8%AE%A1%E7%9A%84%E8%AF%BB%E4%B9%A6%E4%B8%BA%EF%BC%88+%EF%BC%89A.2400NB.1200NC.0ND.600N%E2%80%94%E2%80%94%E2%80%94%E2%80%94%E2%80%94%E2%80%94%E2%80%94%E2%80%94%E2%80%94%E2%80%94%E2%80%94%E2%80%94%E2%80%94%E2%80%94%E2%80%94%E2%80%94%E2%80%94%E2%80%94%E2%80%94%E2%80%94%E2%80%94%E2%80%94%E2%80%94%E2%80%94%E2%80%94%E2%80%94%E2%80%94%E2%80%94%E2%80%94%E2%80%94%E2%80%94)
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