If the spectrum of a signal is discrete and periodic, then the corresponding time domain signal is_____. ( ) A: continue and periodic B: continue and aperiodic C: discrete and periodic D: discrete and aperiodic

what is an analog signal? A: Analog signal is a continous values B: Analog signal is a discrete values C: Analog signal is sometimes continous,sometimes discrete

Determine<br/>whether the following argument is valid or not. “Every computer<br/>science major takes discrete mathematics. Natasha is taking discrete<br/>mathematics. Therefore, Natasha is a computer science major.” ( ) A: valid B: invalid

Settling time and velocity are related to the water depth in discrete particle settling. A: True B: False

In the time domain， the procedure of restoring the original continuous-time signal from discrete sample values is called_______

DCS中D代表英文单词是（）。 A: Digital B: Distributed C: Discrete D: Diagnose

Playing a song on a piano is a type of _________() A: Discrete motor skills B: Serial skills C: Continuous motor skills

Turning on a light switch is characterized as which type of skill? () A: Repetitive B: Discrete C: Continuous D: Sequential

Name of Internet service provider is A: discrete numerical variable B: continuous numerical variable C: categorical variable

We had experienced a period of ______ economic boom and depression. A: discrete B: compound C: alternate D: optional