7岁以上儿童平均所需睡眠时间为

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku where sourceid='25508' and id < 2147441 and id<>'2147441' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='25508' and id > 2147441 and id<>'2147441' order by id asc limit 5