皮亚杰认为个体认知发展从不成熟到成熟一般要经历哪些阶段？（ )

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SQL Error: select id,body,options from ***_enewstiku where sourceid='23627' and id < 2055816 and id<>'2055816' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='23627' and id > 2055816 and id<>'2055816' order by id asc limit 5