[单选题]
02.06: Three resistors of different values can be2nquv,x x qs rr/qwm.h j-2,io (fz(af3gy*,c contvyvbe1x qv*8.3yj j7nected together in different configurations. If all three resistoq.y8 t v v1bxvyjje37*rs are used in a circuit, how many different values of total resistance can be produced?