3. 如圖(一)所示電路,電流I為何? 
(A)1 A
(B)2 A
(C)3 A
(D)4 A
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統計: A(4), B(0), C(1), D(1), E(0) #3871960
統計: A(4), B(0), C(1), D(1), E(0) #3871960
3. 如圖(一)所示電路,電流I為何? 
(A)1 A
(B)2 A
(C)3 A
(D)4 A