()是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。
A.社会折现率
B.财务基准收益率
C.差额投资内部收益率
D.财务内部收益率
参考答案:C
Voices were _____ when the discussion became more heated.[ ]
A. risen
B. raised
C. shouted
D. improved
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