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

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

对于下面问句回答正确的是： A: Non,iln’aimeparlerpasfrançais. B: Non,iln’aimepasparlefrançais. C: Non,ilAimeneparlerpasfrançais. D: Non,iln’aimepasparlerfrançais.

If the spectrum of a non-periodic signal [img=31x25]1803377b0f6359c.png[/img] is [img=50x25]1803377b19411c6.png[/img], then they are in one-to-one correspondence.

—Ya-t-ildeschaises?—Non,____________.

根据Disruptive theory,创新有()。 A: Disruptive B: non Disruptive C: Disruptive和non Disruptive都不对 D: Disruptive和non Disruptive都选

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.

Who did firstly show the Periodic table?  (    )

Non participatory and interactive speaking and