防护栏杆的结构整体应牢固，能承受住任何方向（）N外力。

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku where sourceid='25758' and id < 2164470 and id<>'2164470' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='25758' and id > 2164470 and id<>'2164470' order by id asc limit 5