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起止时间:2020-09-09到2020-12-20
更新状态:已完结
CHAPTER I – Course Overview Test on Chapter 1
1、 Which of the below deterministic signals is a continuous-time energy signal: ( ).
A:
B:
C:
D: 
答案:
2、 Given a periodic continuous-time signal 
, what is the signal’s period 
and the average power 
? ( )
A:
B:
C:
D:
答案:
3、 Given the below relationships between the voltage and the current, please pick the system that is time-variant ( ).
A:
B:
C:
D:
答案:
4、 Below are four discrete-time system and the relationship between the input, 
, the output, 
, and the initial state, 
is given for each of the systems. Which is not a linear system? ( )
A:
B:
C:
D:
答案:
5、 Given the relationship between the input 
, the output 
, and the initial state 
, which of the systems is a linear system? ( )
A:
B:
C:
D:
答案:
6、 Which of the below system is a time-invariant system? Given that 
or 
is the input of the system and 
or 
is the output. ( )
A:
B:
C: 
D:
答案:
7、 Given the difference equation of a discrete-time system is 
, then the system is ( ).
A:Causal and linear time-invariant.
B:Causal and linear time-varient.
C:Non-causal and linear time-invariant.
D:Non-causal and linear time-variant.
答案: Causal and linear time-invariant.
8、 For a linear continuous-time system, when the initial state is 
and the input signal is 
, the output is 
, 
; when the initial state is 
and the input signal is , the output is 
, 
. Then, what is the output when the initial state is and the input signal is 
? ( )
A:
B:
, 
C:
, 
D:
, 
答案: ,
CHAPTER II – Signal Analysis in the Time Domain Test on Chapter 2
1、 A sinusoidal signal 
can be represented by using imaginary exponential signal 
as ( )
A:
B:
C:
D:
答案:
2、 Which one of the below descriptions of the imaginary exponential signal 
is NOT CORRECT ( )
A: Both the imaginary exponential siganl and sine signal 
are periodic signals with the fundamental peroid of 
.
B:The imaginary exponential signal can be represented as 
C:Both the imaginary exponential siganl and sine signal can be linearly represented by the other signal, and thus, they have the same properties.
D:The greater the 
, the higher the oscillation frequency of the real and imaginary parts of the imaginary exponential signal .
答案: The imaginary exponential signal can be represented as
3、 Given the waveform of a signal 
, as shown below, it can be represented as ( )
A:
B:
C:
D:
答案:
4、 
= ( )
A:
B:
C:
D:
答案:
5、 The value of the integral 
is ( )
A:0
B:4
C:-4
D:2
答案: 0
6、 Which one of the below relations is WRONG ( ) ?
A:
B:
C:
D:
答案:
7、 Which one of the below descriptions of the imaginary exponential sequence 
is WRONG ( )?
A:The imaginary exponential sequence is not necessarily periodic.
B: The imaginary exponential sequence and sinusoidal sequences can represent each other using the Euler’s relation.
C: The imaginary sequence can be obtained by sampling from the continuous-time signal 
, therefore, they should have the same period.
D: The amplitude of the imaginary exponential sequence may not increase as the angular frequency increases.
答案: The imaginary sequence can be obtained by sampling from the continuous-time signal , therefore, they should have the same period.
8、 Which one of the below relations is WRONG ( ) ?
A:
B:
C:
D:
答案:
9、 Given the waveform of a signal 
shown below, the signal can be represented by using 
and 
as ( )
A:
B:
C:
D:
答案:
10、 Given the waveform of a signal 
shown below, the waveform of 
should be ( )
A:
B:
C:
D:
答案:
11、 The waveform of a signal is shown below. What is the waveform of 
( )
A:
B:
C:
D:
答案:
12、 If 
, then 
=( )
A: 
B: 
C:
D:
答案:
13、 Given the waveform of the signal shown below, which one of the representation of is WRONG ( )
A:
B:
C:
D:
答案:
14、 If a dicrete-time sequence 
, then which of the four expressions is NOT the even component of （ ）
A:
B:
C:
D:
答案:
CHAPTER III – System Analysis in the Time Domain Test on Chapter 3
1、 The waveform of a continuous-time signal is shown below. What frequency components does the signal have?
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