（    ）一旦发生击穿后，构成永久性破坏，绝缘性能不可能恢复。

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69490' and id < 4501390 and id<>'4501390' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69490' and id > 4501390 and id<>'4501390' order by id asc limit 5