幼儿园组织幼儿参加大型集体活动，应当采取下列哪项安全措施？（ )

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SQL Error: select id,body,options from ***_enewstiku where sourceid='27907' and id < 2291646 and id<>'2291646' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='27907' and id > 2291646 and id<>'2291646' order by id asc limit 5