过阻尼二阶系统的单位阶跃稳态响应为( )
A. 常数
B. 衰减震荡曲线
C. 单调上升曲线
D. 等幅震荡曲线
A: Excuse me, how can I get to the station?B: _________________.
A. Yes, you can
B. Don’t ask me
C. On foot
D. I’m sorry.
A: May I come in?B: _____________.
A. No, you can’t
B. Yes, please
C. Yes, you are
D. No, you can