.采用双母线同时运行的双母线接线，具有单母线分段接线的特点，(    )。

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69520' and id < 4503903 and id<>'4503903' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69520' and id > 4503903 and id<>'4503903' order by id asc limit 5