如图所示在光�水平面上用弹簧水平连接一斜面弹簧的另一端固定在墙上一人站在斜面上系统静止不动.当人沿斜面加速上升则 A.系统静止 Template




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tomski如图所示在光�水平面上用弹簧水平连接一斜面弹簧的另一端固定在墙上一人站在斜面上系统静止不动.当人沿斜面加速上升则 a.系统静止 coloring