下列属于电介质极化产生的现象是()

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69412' and id < 4494209 and id<>'4494209' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69412' and id > 4494209 and id<>'4494209' order by id asc limit 5