电力系统发生不对称短路一定会出现负序分量。（    ）

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69517' and id < 4503694 and id<>'4503694' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69517' and id > 4503694 and id<>'4503694' order by id asc limit 5