雷电通道的波阻抗约为(    )Ω。

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69525' and id < 4504522 and id<>'4504522' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69525' and id > 4504522 and id<>'4504522' order by id asc limit 5