单项选择题
A.垫层高度范围内B.室内地面以下-0.060m处C.垫层标高以下D.平齐或高于室内地面面层
A.平拱砖过梁 B.弧拱砖过梁 C.钢筋砖过梁 D.钢筋混凝土过梁
A.180mm；360mm B.180mm；365mm C.178mm；360mm D.178mm；365mm
A.120mm B.115mm C.110mm D.125mm
A.2.6 B.2.4 C.2.2 D.2.0
A.180 B.160 C.120 D.100
A.平面B.斜面C.凹曲面D.凸面