A.Henry II
B.Henry IV
C.Henry VI
D.Henry VIII
______, I wrote a letter to Henry Ford II and told him what happened.
A.Desperate
B.Despite
C.Inspiring
D.Exciting
A.I,II,III和IV
B.只有II和IV
C.只有I和IV
D.只有I和I
A.smoke
B.smoked
C.smoking
D.smoke
某3阶FIR滤波器的系统函数H1(z)为
(1)试确定幅度响应和H1(z)相同的所有FIR沸波器的系统函数。
(2)上述FIR滤波器邸个是最大相位系统,哪个是最小相位系统?