What are the general characteristics of motion for driving links in a machine at the steady running stage?
A: Periodic fluctuation
B: Non-periodic fluctuation
C: Keep changing between periodic and non-periodic fluctuation
D: Remains constant
A: Periodic fluctuation
B: Non-periodic fluctuation
C: Keep changing between periodic and non-periodic fluctuation
D: Remains constant
举一反三
- What is the difference between the periodic and perpetual inventory systems
- 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
- Which of the following functions can a timer in a computer system be used to achieve? A: Generate interrupt signal regularly B: Measuring the frequency of external periodic signals C: Generate periodic pulse signals D: Generate periodic sine wave
- The periodic table is just a common table.
- Many phenomena in the natural world are periodic(周期性的), with a particular motion repeating itself over and over again.