17. 將電壓源v(t) = 2 sin t(伏特)與 1 亨利電感及 1 法拉電容串聯,則此串聯電路之特徵方程式? (A)s2 + 1 = 0 (B)s2+2 = 0 (C)s2 + 2 = 0 (D)s2 + 2s + 1 = 0.