1）[(R1+Rw+R2)/(Rw+R2](Uz+0.7)≤Uo≤[(R1+Rw+R2)/R2](Uz+0.7)代入数据：[800/600]8≤Uo≤[800/300]810.67V≤Uo≤21.33V2）Uimin=Uomax+Uces=21.33+1=22.33V
