建设工程项目施工成本偏差是指( )之差。
A．已完工程实际施工成本与拟完工程计划施工成本
B．已完工程计划施工成本与拟完工程计划施工成本
C．已完工程实际施工成本与已完工程计划施工成本
D．已完工程计划施工成本与拟完工程实际施工成本
参考答案：C
解析： 在施工成本控制中，把施工成本的实际值与计划值的差异叫做施工成本偏差，即“施工成本偏差＝已完工程实际工成本一已完工程计划施工成本”。
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