94. (v17-118-21) Toklardagi filloksera(kuya)ga qarshi kurashda qollaniladigan organik moddada uglerodning oksidlanish darajalari yigindisini korsating.
A)0
94. (v17-118-21) Toklardagi filloksera(kuya)ga qarshi kurashda qollaniladigan organik moddada uglerodning oksidlanish darajalari yigindisini korsating.
A)0 B) +4 C)+2 D)+6