A 提高延性性能 B 加强对混凝土的约束 C 提高抗剪承载力 D 防止底部纵筋首先屈服

A <img border="0" alt="" src="https://tuku.weimei168.com/uploads/upimg/20251122/13559982_0_1.jpg"> B <img border="0" alt="" src="https://tuku.weimei168.com/uploads/upimg/20251122/13559982_0_2.jpg"> C <img border="0" alt="" src="https://tuku.weimei168.com/uploads/upimg/20251122/13559982_0_3.jpg"> D <img border="0" alt="" src="https://tuku.weimei168.com/uploads/upimg/20251122/13559982_0_4.jpg">

A 化学成分 B 脱氧程度 C 轧制次数 D 厚度或直径

A <img border="0" alt="" src="https://tuku.weimei168.com/uploads/upimg/20251122/13560176_0.jpg"> B <img border="0" alt="" src="https://tuku.weimei168.com/uploads/upimg/20251122/13560176_0_1.jpg"> C <img border="0" alt="" src="https://tuku.weimei168.com/uploads/upimg/20251122/13560176_0_2.jpg"> D <img border="0" alt="" src="https://tuku.weimei168.com/uploads/upimg/20251122/13560176_0_3.jpg">

A P/2 B P/4 C P D 0

A <img border="0" alt="" src="https://tuku.weimei168.com/uploads/upimg/20251122/13560371_0_1.jpg"> B <img border="0" alt="" src="https://tuku.weimei168.com/uploads/upimg/20251122/13560371_0_2.jpg"> C <img border="0" alt="" src="https://tuku.weimei168.com/uploads/upimg/20251122/13560371_0_3.jpg"> D <img border="0" alt="" src="https://tuku.weimei168.com/uploads/upimg/20251122/13560371_0_4.jpg">

A 3.6kN·m(顺时针向) B 3.6kN·-m(逆时针向) C 6.6kN·-m(顺时针向) D 6.6kN-m(逆时针向)

A 结构的内力分布情况须与材料性能相适应，以便发挥材料的优点 B 荷载传递的路程愈远，结构使用的材料愈省 C 杆件受弯较受轴向力能更充分地利用材料 D 超静定结构可以降低内力，节省材料

A 水泥砂浆 B 石灰砂浆 C 混合砂浆 D 泥浆

A 无多余约束的几何不变体系 B 有多余约束的几何不变体系 C 常变体系 D 瞬变体系