ideological and theoretical qualities and practical working ability, and strive to build a contingent of league ca...
第2章质点动力学2-1牛顿运动定律§2-1§2-1牛顿运动定律任何物体都要保持其静止或匀速直线运动状态，直到外力迫使它改变运动状态为止.一牛...
