【多选题】
用于预应力混凝土结构的钢材包括（ ）。___
A. 张拉力
B. 应变值
C. 油压力
D. 回缩值
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答案
AC
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地下结构的规则性宜符合下列要求___
A. 地下结构宜具有合理的刚度和承载力分布。
B. 地下结构下层的竖向承载结构刚度不宜低于上层。
C. 地下结构及其抗侧力结构的平面布置宜规则、对称、平顺，并应具有良好的整体性。
D. 在结构断面变化较大的部位，宜设置能有效防止或降低不同刚度的结构间形成牵制作用的防震缝或变形缝。
E. 缝的宽度应符合防震缝的要求。
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盾构隧道应采取下列抗震措施:___
A. 盾构隧道的接头构造，应有利于减小地震时防止管片接头的错动和管片因地震动位移的磕碰破坏。
B. 管片接头的防水应能保证地震后接缝不漏水。
C. 盾构管片间的连接螺栓，在满足常规受力要求的前提下，宜采用小的刚度。
D. 管片宜采用错缝拼装方式。
E. 在软弱地层或地震后易产生液化的地层，管片端面宜设置凹凸榫槽。
【多选题】
以下选项正确的是___
A. 使用带帽前先检查外壳是否破损，有无合格帽衬，帽带是否齐全，如果不符合要求立即更换。
B. 在无法直接挂设安全带的地方，应设置挂安全带的安全拉绳、安全栏杆等
C. 选用经有关部门检查合格，其上有“安监”标志的安全帽。
D. 2m以上3m以下的悬空作业，不必使用安全带。
【多选题】
安全网系用来防止人、物坠落或用来避免、减轻坠落及物体打击伤害的网具使用时要注意：___
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B. 安全网若有破损、老化应及时更换。
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【多选题】
以下不能登高的情况有___
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B. 未按规定办理登高作业审批手续的不登高。
C. 没有戴安全帽、系安全带，不扎紧裤管和无人监护不登高。
D. 暴雨、大雾、六级以上大风时，露天不登高。
E. 脚手架、跳板不牢不登高。
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【单选题】
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