4.求圖5中,分路電流I2 。
(A)I2=4mA
(B)I2=6mA
(C)I2=4A
(D)I2=6A
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統計: A(6), B(2), C(47), D(0), E(0) #2712720
統計: A(6), B(2), C(47), D(0), E(0) #2712720