建设项目财务现金流量的基本要素包括( )。
A.税金
B.折旧、摊销费
C.投资
D.经营成本
E.销售收入
参考答案:A,C,D,E
This old lady ______ alone because her husband died ten years ago. [ ]
A. gets used to live
B. used to live
C. used to living
D. is used to living
辅助燃烧室和加热炉均可采用干气燃烧油作燃料。