现浇框架弯矩调幅系数β可以取0.5～0.9。梁端负弯距减小后，应按平衡条件计算调幅后的跨中弯距，且调幅后的跨中弯距不应小于简支情况跨中80%。
参考答案：错
I requested _____ talking. Which of the following is wrong? [ ]
A. that he stop
B. him to stop
C. that he stops
D. that he should stop
大量血胸，X线胸片呈现为（）
A.X线胸片呈肺野磨玻璃样变或面纱征
B.X线胸片呈多发边缘锐利、密度均匀高密度影
C.X线胸片呈一侧胸腔一片致密均匀阴影，纵隔向健侧移位
D.X线胸片呈纵隔气肿，大量气胸
E.X线胸片呈心影明显增大，心脏各弧消失
