淋巴细胞增多诊断标准
A.>4.0×109/L
B.>3.0×109/L
C.>2.0×109/L
D.>1.0×109/L
E.>0.5×109/L
参考答案:A
He puts the food into bags. [ ]
A. each other
B. each other's
C. one other's
D. one another
设某FIR滤波器的系统函数为H(z)=1+0.5z-1-0.5z-3-z-4,
判断该FIR滤波器是否具有线性相位特征。