• 2022-06-16
    Given a time-limited sequence [img=177x51]180337767287652.png[/img], then the value of the spectrum [img=51x28]180337767b726d7.png[/img] at [img=46x19]1803377683f219b.png[/img] is [img=67x27]180337768cd91d9.png[/img]
    A: 1
    B: 2
    C: 3
    D: 5
  • 举一反三