奇函数类型的非正弦周期电流的傅里叶展开式中不含有（）项。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='32635' and id < 2595037 and id<>'2595037' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='32635' and id > 2595037 and id<>'2595037' order by id asc limit 5