抱杆基础应平整坚实、不积水。在土质坚硬的地方，抱杆脚应用垫木垫牢(   )。

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69530' and id < 4505093 and id<>'4505093' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69530' and id > 4505093 and id<>'4505093' order by id asc limit 5