三相非正弦周期电流压展开成傅里叶级数后，（）次谐波构成一组负序对称组。

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku where sourceid='32635' and id < 2595034 and id<>'2595034' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='32635' and id > 2595034 and id<>'2595034' order by id asc limit 5