N-S diagram can used to substitute conventional program flow Chart．In the following phrases，Which does not belong to the basic control structures that contain

A．sequence structure

B．condition Structure

C．selection structure

D．execution structure

在工程经济分析中，下列各项中属于经营成本的有（）。

A．外购原材料、燃料费

B．工资及福利费

C．修理费

D．利息支出

E．折旧费