相比较的两个方案的各年净流量差额的现值之和等于零时的折现率是( )。
A.财务内部收益率 B.社会折现率C.差额投资内部收益率 D.差额投资收益率
参考答案:C
______ the storm, the ship would have reached its destination on time.
A.In spite of
B.In case of
C.But for
D.Because of
下列哪项不是增感屏的结构
A.基层
B.乳剂层
C.保护层
D.反射层
E.防反射层