20 如圖所示,試求電流I1 之值?
(A)1安培
(B)2安培
(C)3安培
(D)4安培
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統計: A(11), B(19), C(224), D(18), E(0) #1193554
統計: A(11), B(19), C(224), D(18), E(0) #1193554