A. B. C. D.
A.位相差為2kπ B.位相差為(2k+1)π C.位相差(2k+1)π/2 D.(2k+1)π/4
A.位相差為2kπ B.位相差為kπ C.位相差(2k+1)π/2 D.(2k+1)π/4