钢筋混凝土简支T梁桥,梁高与跨径之比(即高跨比)的经济范围在1/18~1/11之间,跨径大的取用其中()的比值。
A.中间
B.偏大
C.偏小
D.根据具体情况看
参考答案:C
用划线单词的反义词填空。
1. Beijing is a ___________ city. Shijiazhuang is a small city.
2. Danny is quiet, but Jenny is ___________.
3. He came here at six. I ___________ there at six, too.
4. The desk is old, but the chair is ___________.
5. A bus is ___________. An airplane is fast.
动脉导管未闭超声图像的特征是()
A.主动脉变窄
B.房间隔显示中断
C.肺动脉变窄
D.降主动脉与肺静脉连接
E.显示从降主动脉向肺动脉的双期分流血流