43.試求圖1之各電阻壓降。 (A)R1的壓降為6VR2的壓降為3VR3的壓降為2VR4的壓降為1V(B)R1的壓降為1VR2的壓降為2VR3的壓降為3VR4的壓降為6V(C)R1的壓降為6VR2的壓降為2VR3的壓降為3VR4的壓降為1V(D)R1的壓降為1VR2的壓降為3VR3的壓降為2VR4的壓降為6V