9.某实验小组的同学在电梯的天花板上固定一根弹簧秤使其测量挂钩�下并在钩上悬挂一个重为10n的钩码.弹簧秤弹力随时间变化的规律可通过一传感 Template




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tomski9.某实验小组的同学在电梯的天花板上固定一根弹簧秤使其测量挂钩�下并在钩上悬挂一个重为10n的钩码.弹簧秤弹力随时间变化的规律可通过一传感 coloring