梁高小于500mm，KV＞Vc的梁中箍筋最大间距为下列哪项（）
A.200mm
B.250mm
C.300mm
D.350mm
参考答案：A
21st Century, ____weekly newspaper, provides us with____variety of fresh articles about campus studies and life.
A．a, the
B．the, a
C．the, /
D．a, a
墙模板拼接时，U型卡应正反交替安装，间距不得大于（）。
A.100mm
B.200mm
D.400mm
