下列说法中正确的是 A.静止在斜面上的物体所受重力可以分解为沿斜面�下的力和垂直斜面的压力 b.一对作用力和反作用力做功的代数和一定为零 C Template




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tomski下列说法中正确的是 a.静止在斜面上的物体所受重力可以分解为沿斜面�下的力和垂直斜面的压力 b.一对作用力和反作用力做功的代数和一定为零 coloring