题图所示电路中,已知 u S1=6V, u S2=2V, R 1=3Ω, R 2=1Ω, i 3=4A, 试求电流 i 1和 i 2分别为 A. i 1=1A, i 2=2A B. i 1=3A, i 2=1A C. i 1=1A, i 2=3A D. i 1=2A, i 2=1A
A.
B.
C.
D.
D
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