电路如图所示，电压为（   ）。

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69476' and id < 4499760 and id<>'4499760' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69476' and id > 4499760 and id<>'4499760' order by id asc limit 5