As a result, the system will vibrate at the frequency of the _____ force regardless of the initial conditions or natural frequency of the system.
· action
· excitation
· out
· act
出自:佳木斯大学语言治疗学

完成拼图验证

按住下方滑块,将拼图拖到缺口处后松开。

拼图背景,将小拼图拖到缺口处
向右拖动滑块