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What is bluetooth technology？
提问人：网友steven7677
发布时间：2022-01-07
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第2题
The spectrum of a continuous-time signal [图] is [...
The spectrum of a continuous-time signal
is
, shown in the figure below. If one samples the signalat a sampling frequency
to obtain a discrete-time signal
, then the spectrum of the dicrete-time signalis
. Given that
, which of the below spectrum is?
A、
B、
C、
D、
