【单选题】节点电压分析方法中,如图所示:节点电压之差方程: 。
【单选题】以下关于节点电压法,正确的是()
A.
以结点电压为未知量列写电路方程分析电路的方法。适用于结点较多的电路。
B.
结点电压法列写的是结点上的KCL方程,独立方程数为:n-1。
C.
任意选择参考点:其它结点与参考点的电位差即为结点电压(位),方向为从独立结点指向参考结点。
D.
结点的自电导等于接在该结点上所有支路的电导之和。
【单选题】红外线是位于可见光中红色光以外的光线,故称红外线。它的波长范围大致在 ( )到1000μm的频谱范围之内。
【单选题】关于极坐标形式下的潮流方程,表述正确的是
【简答题】A. time B. have C. sea D. and E. like F. spend G. cool With July coming, the summer holidays begin. Boys and girls in England will _1_ a two-month holiday. The holidays are th...
【单选题】Can you choose the most appropriate words to describe sounds in the following description? Countrymen, butchers, drovers, hawkers, boys, thieves, idlers and vagabonds of every low grade, were mingled ...
A.
whistling, bellowing, bleating, barking, grunting
B.
whistling, barking, bleating, bellowing, grunting
C.
bellowing, barking, bleating, grunting, whistling
D.
whistling, barking, bellowing, bleating, grunting
【判断题】我们已经实现小康生活,还谈节约和艰苦奋斗干什么呢?
【单选题】Can you choose the most appropriate words to describe sounds in the following description? Countrymen, butchers, drovers, hawkers, boys, thieves, idlers and vagabonds of every low grade, were mingled ...
A.
whistling, barking, bleating, bellowing, grunting
B.
whistling, barking, bellowing, bleating, grunting
C.
bellowing, barking, bleating, grunting, whistling
D.
whistling, bellowing, bleating, barking, grunting