19. 若【圖19】電路中之 =18V, =5.1V, =0.7V,R1 = 1kΩ, = 2.2kΩ,則電流 I 為多少? (A) 2mA (B) 4.4mA (C) 5.4mA (D) 12.9mA
19. 若【圖19】電路中之 =18V, =5.1V, =0.7V,R1 = 1..-阿摩線上測驗