A 圆形截面 B 正方形截面 C 高宽比为2.0的矩形截面 D 工字形截面

A <img border="0" alt="" src="https://tuku.weimei168.com/uploads/upimg/20251122/13562915_0_1.jpg"> B <img border="0" alt="" src="https://tuku.weimei168.com/uploads/upimg/20251122/13562915_0_2.jpg"> C 拉力P D 压力P

A Ⅰ、Ⅲ B Ⅱ、Ⅲ C Ⅰ、Ⅳ D Ⅱ、Ⅳ

A <img border="0" alt="" src="https://tuku.weimei168.com/uploads/upimg/20251122/13560094_0.jpg"> B <img border="0" alt="" src="https://tuku.weimei168.com/uploads/upimg/20251122/13560094_0_1.jpg"> C <img border="0" alt="" src="https://tuku.weimei168.com/uploads/upimg/20251122/13560094_0_2.jpg"> D <img border="0" alt="" src="https://tuku.weimei168.com/uploads/upimg/20251122/13560094_0_3.jpg">

A 各种含碳量的钢材 B 高碳钢 C 低碳钢 D 中碳钢

A 80～100 B 100～150 C 150～180 D 180～200

A Ⅰ类坚硬场地土 B Ⅱ类中硬场地土 C Ⅲ类中软场地土 D Ⅳ类软弱场地土

A 混凝土徐变是指缓慢发生的自身收缩 B 混凝土徐变是在长期不变荷载作用下产生的 C 混凝土徐变持续时间较短 D 粗骨料的含量与混凝土的徐变无关

A <img border="0" alt="" src="https://tuku.weimei168.com/uploads/upimg/20251122/13560892_0_1.jpg"> B <img border="0" alt="" src="https://tuku.weimei168.com/uploads/upimg/20251122/13560892_0_2.jpg"> C <img border="0" alt="" src="https://tuku.weimei168.com/uploads/upimg/20251122/13560892_0_3.jpg"> D <img border="0" alt="" src="https://tuku.weimei168.com/uploads/upimg/20251122/13560892_0_4.jpg">

A 表面涂刷防锈漆 B 表面做金属镀层 C 适当加大钢材截面厚度 D 表面涂抹环氧树脂