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【判断题】
婴儿从刚出生开始,视觉就很灵敏。A.
正确
B.
错误
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反馈参考答案：
举一反三
【单选题】Who are the speakers?
A.
Salesman and customer.
B.
Manager and secretary.
C.
Nurse and patient.
【简答题】一.数字滤波器的频谱特性: 1. H(e^jw) 是数字频率 w rad 的______函数,周期为 __________ , 2. 低频段在 _____ 的整数倍处,高频段在_____________ 的奇数倍处。 二.选频滤波器应注重其( );若对滤波器的时域输出波形有严格要求,如语音合成、数字图像处理等应用场合,选()比较合适。 三.数字滤波器频率特性的频率变量为( )。
【单选题】Who are the speakers?
A.
English majors
B.
senior students at college
C.
beginners in English study
D.
non-English majors at college
【单选题】Who are the speakers?
A.
Waitress and customer.
B.
Hostess and guest.
C.
Shop assistant and customer.
【单选题】Who are the speakers?
A.
A Student and a teacher.
B.
An interviewer and clerk.
C.
A student and a president.
D.
An employer and an employee.
相关题目：
【单选题】Who are the speakers?
A.
Salesman and customer.
B.
Manager and secretary.
C.
Nurse and patient.
参考解析：
知识点：
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