对于双母线同时运行的变电站，可以配置的母线保护有（    ）。

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69488' and id < 4501105 and id<>'4501105' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69488' and id > 4501105 and id<>'4501105' order by id asc limit 5