单选题:《钢结构工程施工质量验收规范》规定,吊车梁和吊车桁架的组装检查结果,不应有(  )。

题目内容:
《钢结构工程施工质量验收规范》规定,吊车梁和吊车桁架的组装检查结果,不应有(  )。 A.下挠
B.上挠
C.侧弯
D.扭曲

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