下列（ ）情况下，具有电压切换功能的合并单元切换选择为二母电压。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='29468' and id < 2398952 and id<>'2398952' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='29468' and id > 2398952 and id<>'2398952' order by id asc limit 5