11. 試求圖6之I1。
(A)I1 =1A
(B)I1 =2A
(C)I1 =3A
(D)I1 =4A
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統計: A(5), B(58), C(2), D(4), E(0) #2711493
統計: A(5), B(58), C(2), D(4), E(0) #2711493