【单选题】用回路电流法求解图中5Ω电阻中的电流时,网孔I的回路方程、网孔II的回路方程、网孔III的回路方程为 ( ) 。
A.
12*i1-6*i2=0 -6*i1+17*i2-8*i3=48 -17*i2+16*i3=0
B.
12*i1-6*i2=96 6*i1+17*i2-8*i3=48 -17*i2+16*i3=0
C.
12*i1-6*i2=96 6*i1+17*i2-8*i3=48 -8*i2+16*i3=0
D.
12*i1-6*i2=96 6*i1+17*i2-8*i3=48 - 17*i2+16*i3=0
【简答题】A.They think them fashionable. B.They want to keep themselves fit. C.They look for pleasure and excitement in activities. D.They have a lot of free time to enjoy themselves.
【单选题】护士整理出院病案排中最前和最后的内容分别是
【单选题】( )是真核细胞内最大、最重要的细胞器,是细胞遗传与代谢的调控中心。