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='69393' and id < 4492021 and id<>'4492021' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69393' and id > 4492021 and id<>'4492021' order by id asc limit 5