在相同的电压、电流条件下，交流电弧比直流电弧更难熄灭。（  ）

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69482' and id < 4500424 and id<>'4500424' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69482' and id > 4500424 and id<>'4500424' order by id asc limit 5