【判断题】预应力混凝土梁由于预压应力的作用,在使用阶段不易产生裂缝、挠度小,还显著地提高了极限承载能力。
【单选题】Bob never does his homework ______ Mary. He makes lots of mistakes. [ ]
【判断题】经过全党和全国各族人民的共同努力,我们胜利实现了现代化建设(三步走)战略部署的第一步、第二步目标,人民生活总体上达到小康水平。()()
【单选题】党的十六大报告指出:经过全党和全国各族人民的共同努力,我们胜利实现了现代化建设“三步走”战略的哪个目标。( )
【单选题】Bob never does his homework ___ Mary. He makes lots of mistakes.
【单选题】非预应力的普通钢筋 混凝土梁,在正常使用阶段处于带裂缝工作状态,由钢筋承担的拉力与混凝土截面承担的压力都随着外荷载弯矩的增加成比例( ),而内力偶臂( )
【单选题】Bob never does his homework _____ Mary. He makes lots of mistakes.
【单选题】Bob never does his homework ____ Mary. He makes lots of mistakes