（ ）Estimating current project costs by analogy with similar projects。（ ）是以类似的项目进行类比估计当期项目的费用。A.Top-down estimating自上而下估算法B.Parametric model method参数模型法C.Bottom-up estimation metho从下向上的估计法D.Computing Tool Aided Method计算工具辅助的方法
（ ）Estimating current project costs by analogy with similar projects。
（ ）是以类似的项目进行类比估计当期项目的费用。
（ ）是以类似的项目进行类比估计当期项目的费用。
A.Top-down estimating
自上而下估算法
B.Parametric model method
参数模型法
C.Bottom-up estimation metho
从下向上的估计法
D.Computing Tool Aided Method
计算工具辅助的方法
自上而下估算法
B.Parametric model method
参数模型法
C.Bottom-up estimation metho
从下向上的估计法
D.Computing Tool Aided Method
计算工具辅助的方法
参考解析
解析：“自上而下估算法”。这种方法的基本操作步骤是：（1）监理项目组的高层次管理人员收集以往类似项目的有关历史资料；（2）会同有关成本方面的专家对当前项目的总成本进行估算；（3）将估算结果按照项目工作分解结构图的层次结构传递给下层的项目监理人员，在此基础上，他们对自己所负责的工作和活动的成本进行估计；（4）继续向下一层监理人员传递估计信息。从步骤可以看出，自上而下估算法，是依据类似项目，进行估算当期项目的费用。
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