19. 有一 RLC 並聯電路，R = 200 Ω，L = 50 mH，C = 0.2 μF，請問該電路之納頻率(Neper Frequency，α)及諧振弳頻率(Resonant Radian Frequency，ω0)分別為何？(單位：rad / s)(A) α = 2.5 × 103、ω0 = 2 ×108(B) α = 2.5 × 103、ω0 = 2 × 104(C) α = 1.25 × 104、ω0 = 108(D) α = 1.25 × 104、ω0 = 104