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单项选择题

下列抗扭纵筋的布置中不正确的是(  )。

A．沿构件截面周边均匀布置
B．截面四角必须有纵向受扭钢筋
C．全部抗扭纵筋应和受夸纵筋合并配置
D．抗扭纵筋间距不应大于200mm和梁的宽度
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Lisa was running late.Lisa,25,had a lot to do at work,plus visitors on the way:her parents were coming in for Thanksgiving from her hometown.But as she hurried down the subway stairs,she started to feel uncomfortably warm.By the time she got to the platform,Lisa felt weak and tired—maybe it hadn′t been a good idea to give blood the night before,she thought.She rested herself against a post close to the tracks.
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It was hard to lift her.She was just out.But he managed to raise her the four feet to the platform so that bystanders could hold her by the arms and drag her away from the edge.That was where Lisa briefly regained consciousness,felt herself being pulled along the ground,and saw someone else holding her purse.
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