若要求三相负载中各相互不影响，负载应接成（     ）。

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='68472' and id < 4420911 and id<>'4420911' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='68472' and id > 4420911 and id<>'4420911' order by id asc limit 5