单选题:静态投资是以(  )的建设要素价格为依据所计算出的瞬时值。

题目内容:
静态投资是以(  )的建设要素价格为依据所计算出的瞬时值。 A.计划投资时
B.开工日期
C.竣工日期
D.某一基准年、月

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