78.Nyquist frequency,以 cycles/pixel 應表示為:
(A)0.5
(B)2
(C)0.25
(D)4
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統計: A(1243), B(330), C(112), D(21), E(0) #2742358
統計: A(1243), B(330), C(112), D(21), E(0) #2742358