幼儿知道了“5 + 2 = 7”，不经过学习就不能导出“7 — 5 = 2”，说明他们的思维具有 （ )

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SQL Error: select id,body,options from ***_enewstiku where sourceid='28331' and id < 2318646 and id<>'2318646' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='28331' and id > 2318646 and id<>'2318646' order by id asc limit 5