The examination book does not give a specific explanation, so we should get out of the relationship between the whole and the part. It is true that a large-scale project (both civil engineering and municipal engineering) can be regarded as a general building, which consists of single projects, unit projects, sub-projects and sub-projects. , but as long as we have an independent role in the preparation of construction organization design, for example, single buildings have independent occupation capacity; For example, blocks of bridges and tunnels have bearing capacity, which is a unit project. Each unit project has subdivided divisions or sub-divisions, such as energy conservation and environmental protection of buildings, concrete, steel bars and cable-membrane structures in the main structure, and more detailed sub-projects such as pile foundation and doors and windows under decoration.
We also know that in quality evaluation or acceptance, a project is divided into units, divisions, disciplines, inspection lots and other procedures or stages. So just answer this question according to the circumstances, without delving into the dead end.
I hope it works.