【单选题】如图所示,图中表示为F02仪表盘中的组成,请问描述正确的是?
【简答题】已知某系统的传递函数方框图如图(a)所示,其中,X i (s)为输入,X(s)为输出,N(s)为干扰,试求G(s)为何值时,系统可以消除干扰的影响。
【单选题】Years of attendance upon schools and colleges that are thought to be _________ have produced no impression.
【判断题】对于带速较低的带传动,其带轮材料多为灰铸铁。
【简答题】In our country, attendance at school is (__) for children over six years of age.
【判断题】对于带速较低的带传动,其带轮材料多为灰铸铁。