A.x≧2as’ B.x≦2as’ C.x<2as’ D.x>2as’
A.鋼筋 B.受力鋼筋 C.架立鋼筋 D.箍筋
A.a1fcbx<fyAs B.a1fcbx>fyAs C.a1fcbx=fyAs D.a1fcbx≦fyAs