下列因素中，明显影响离子式极化的是  (   )。

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69489' and id < 4501297 and id<>'4501297' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69489' and id > 4501297 and id<>'4501297' order by id asc limit 5