18.如图所示质量相等的ab两物体在平行于固定斜面的推力f的作用下沿光�斜面做匀速直线运动ab间轻弹簧的劲度系数为k斜面的倾角为 Template




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tomski18.如图所示质量相等的ab两物体在平行于固定斜面的推力f的作用下沿光�斜面做匀速直线运动ab间轻弹簧的劲度系数为k斜面的倾角为 coloring