交流电流表和电压表测量所测得的值都是有效值。

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku where sourceid='27215' and id < 2260434 and id<>'2260434' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='27215' and id > 2260434 and id<>'2260434' order by id asc limit 5