俗话说:“喊破嗓子不如做出样子。”这说明教师应该做到 （）

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SQL Error: select id,body,options from ***_enewstiku where sourceid='24934' and id < 2126234 and id<>'2126234' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='24934' and id > 2126234 and id<>'2126234' order by id asc limit 5