经遗传获得的免疫称作()。 ["获得性免疫;","特异性免疫;","非特异性免疫;","细胞免疫。"]
属于柔性基础的是() ["砖基础","毛石基础","混凝土基础","钢筋混凝土基础"]
飞机出现荷兰滚时() ["方向稳定性小于横向稳定性","方向稳定性大于横向稳定性","方向稳定性等于横向稳定性","与两个稳定性的匹配无关"]
细胞增殖周期的顺序依次是() ["G1→M→G2→S","G1→S→G2→M","M→G1→G2→S","S→G1→M→G2","G1→G2→M→S"]
基坑的边坡坍塌是属于边坡土体的()破坏。 ["抗压强度","抗剪强度","抗拉强度"]
两泵并联目的在于增加流量。其泵特性和管路特性平坦好还是陡降好?