依据《建筑基坑支护技术规范》JGJ l20一2012,破坏后果为“支护结构失效、土体过大变形对基坑周边环境或主体结构施工

依据《建筑基坑支护技术规范》JGJ l20一2012,破坏后果为“支护结构失效、土体过大变形对基坑周边环境或主体结构施工安全的影响很严重”的基坑属于(  )。A

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混凝土拆模时,混凝土的表面温度与中心温度之间、表面温度与外界气温之间的温差不超过(  )。

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What is the most important quality a parent should have acco

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