_____ a certain doubt among the people as to the practical value of the project. [ ]

A. It has

B. They have

C. It remains

D. There remains

既是设计单位编制设计概算或建设单位编制年度投资计划的依据，也可作为编制估算指标的基础是()。

A.概算指标

B.概算定额

C.预算定额

D.施工定额