半径为10米的圆形旱冰场上有7名同 学，这些同学间的最短距离至多为：

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku where sourceid='31556' and id < 2528178 and id<>'2528178' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='31556' and id > 2528178 and id<>'2528178' order by id asc limit 5