若M户|过大，正弦波振荡器会出现（ ）现象。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='30217' and id < 2444248 and id<>'2444248' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='30217' and id > 2444248 and id<>'2444248' order by id asc limit 5