2024知到答案 信号与系统(全英文)(北京理工大学) 完整智慧树网课章节测试答案
第一章 单元测试
1、单选题:
The period of is ( )。
选项:
A:
B:
C:
D:
答案: 【】
2、单选题:
The period of is ( )。
选项:
A:3
B:15
C:10
D:30
答案: 【30】
3、单选题:
and are the input and output signals of the system respectively, and only ( ) below is a causal LTI system.
选项:
A:
B:
C:
D:
答案: 【】
4、单选题:
( )。
选项:
A:
B:
C:
D:
答案: 【】
5、单选题:
( )。
选项:
A:
B:
C:
D:
答案: 【】
6、判断题:
A memoryless system must not be a causal system.( )
选项:
A:错
B:对
答案: 【错】
7、判断题:
A cascade of two LTI systems is also a LTI system.( )
选项:
A:对
B:错
答案: 【对】
8、判断题:
A cascade of two nonlinear systems is still a nonlinear system.( )
选项:
A:错
B:对
答案: 【错】
9、判断题:
time shifts to become , and when , is to the left of .( )
选项:
A:错
B:对
答案: 【对】
10、判断题:
The product of two odd signals or two even signals is an even signal.( )
选项:
A:对
B:错
答案: 【对】
11、判断题:
The product of an odd signal and an even signal is an even signal.( )
选项:
A:对
B:错
答案: 【错】
12、判断题:
The unit impulse response of a delay with a time delay for a CT signal is , the unit impulse response of an integrator is , and the unit impulse response of a differentiator is .( )
选项:
A:错
B:对
答案: 【对】
第二章 单元测试
1、单选题:
The impulse response of a CT linear causal system must satisfy condition ( )。
选项:
A:
B:
C:
D:
答案: 【】
2、单选题:
Given , ( )。
选项:
A:
B:
C:
D:
答案: 【】
3、单选题:
For a CT LTI system, if the input-output relationship is given by , then the system's unit impulse response is ( ).
选项:
A:
B:
C:
D:
答案: 【】
4、判断题:
Given , then 。( )
选项:
A:对
B:错
答案: 【错】
5、判断题:
Given , then 。( )
选项:
A:错
B:对
答案: 【对】
6、判断题:
Given , and , , then , 。( )
选项:
A:对
B:错
答案: 【对】
7、判断题:
Given , and , , then , 。( )
选项:
A:对
B:错
答案: 【对】
8、判断题:
Given a system with input-output relationship as , and , the system is time-invariant.( )
选项:
A:对
B:错
答案: 【对】
9、判断题:
Given a system with input-output relationship as , the system is non-linear.( )
选项:
A:对
B:错
答案: 【错】
10、判断题:
Given a system with unit impulse response as , the system is a stable LTI system.( )
选项:
A:错
B:对
答案: 【对】
11、判断题:
Given a system with unit impulse response as , the system is a stable LTI system.( )
选项:
A:对
B:错
答案: 【错】