用戴维南定理求时，直接求法中电源必须为0,则电压源开路，电流源短路。（）

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku where sourceid='32671' and id < 2598901 and id<>'2598901' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='32671' and id > 2598901 and id<>'2598901' order by id asc limit 5