单项选择题
A.0.1%≤体积配筋率≤0.8%B.0.4%≤体积配筋率≤0.8%C.0.5%≤体积配筋率≤1%D.0.1%≤体积配筋率≤1%
A.梯形截面柱B.矩形截面墙C.正方形截面柱D.正方形截面墙
A.三B.五C.七D.九