5.jpg
A.I1=0.2 A,I2=1A,I3=3 A
B.I1=0.2 A,I2=-0.1A,I3=0.1 A
C.I1=3 A,I2=-2 A,I3=1 A
D.I1=-0.1 A,I2=0.2 A,I3=0.1 A
正确答案是B