______是对一类相似对象的属性和行为特性的抽象描述。
参考答案:类
解析: 类是对一类相似对象的属性和行为特性的抽象描述。类代表了一类对象,这类对象有一些共同特性。
Which of the following statements about capital budgeting is TRUE()
A. Since capital budgeting is based on cash flows rather than net accounting income, changes in noncash balance sheet accounts such as inventory are not relevant to the analysis.
B. If an investment project would make use of property that the firm currently owns, the project should not be charged with the opportunity cost (rental income) of the property.
C. Any cash flow that can be classified as incremental is relevant in a capital budgeting project analysis.
为什么地球大气中的辐射过程可以认为是辐射平衡的?