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all these materials are used in a number of civil engineering structures,such as dams,liquid-retaining structures.4681

分类: 作业答案 • 2022-02-06 10:11:38

问题描述：

all these materials are used in a number of civil engineering structures,such as dams,liquid-retaining structures.4681

答

所有这些材料被使用在许多民间工程结构,例如坝,滞流体结构