保护安装处至故障点之间的阻抗称为（   ）。

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69377' and id < 4491371 and id<>'4491371' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69377' and id > 4491371 and id<>'4491371' order by id asc limit 5