确定投资方案现金流量应遵循的基本原则是，只有增量现金流量才是与该项目相关的现金流量。 ( )
参考答案：对
Which of the following statements best justifies analyst scrutiny of valuation allowances（）
A. If differences in taxable and pretax incomes are never expected to reverse, a company’ s equity may be understated.
B. Increases in valuation allowances may be a signal that management expects earnings to improve in the future.
C. Changes in valuation allowances can be used to manage reported net income.
直接电离辐射包括（）。
A.电子
B.质子
C.α粒子
D.重离子
E.γ射线
F.中子
