【单选题】二阶系统的传递函数为 ,其无阻尼固有频率为 ( )。
【单选题】某 二阶系统的传递函数为 ,则其无阻尼固有频率 为 ( ) 。
【多选题】下列程序中注释的哪两个代码是错误的(无法通过编译)? class Father { private int money=12; float height; int seeMoney( ) { return money; //【代码1】 } } class Son extends Father { int height; int lookMoney( ) { int m...
【简答题】( ) 10. Did you catch the first bus thismorning? No, I didn’t If you ___ earlier, you ___ the bus.A. got up; would catch B. should get up; would catch C. had got up; would have caught D. had got up; w...
【单选题】工化 2.2.2 下列离子晶体中熔点最高的是 ( )。
【简答题】根据文章上下文,将A-F填入下列横线中 A.What plan do you suggest? B.What would you do in my situation? C.You could always start with an exercise programme. D.Maybe Advice you should join them. E.If I were you, I’d star...
【单选题】---- Did you catch the first bus this morning? ---- If I ___________ earlier, I ___________ the bus.
B.
should get up; could catch
C.
had got up; would have caught
D.
had got up; would catch
【单选题】有二阶系统的传递函数为 ,则其无阻尼固有频率和 阻尼比 依次为 ( ) 。