【单选题】Pauline did NOT collect ______ when she was a child.
【单选题】What class did Pauline take during her honeymoon?
【单选题】Pauline did NOT ______ this weekend.
【单选题】Which of the following did NOT occur?
A.
Pauline visited one of London's parks.
B.
Pauline went to the airport by taxi.
C.
Pauline contacted the airline by telephone.
D.
Pauline stayed the night in London.
【简答题】已知单位负反馈系统的开环传递函数为 , (1)用劳斯判据判断系统的稳定性;(2)若要求闭环系统特征方程根的实部均小于-1,试问开环增益K应该如何取值?(写出详细的解题过程,拍照上传)
【多选题】一般的( )拥有提作权限、( )拥有复核员权限,( )拥有管理员权限