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问题 单项选择题

投资回收期可借助财务现金流量表、净现金流量数据和（）计算求得。

A.累计净现金流量折现值

B.累计净现金流量数据

C.净现金流量折现值

D.净现金流量现值

答案

参考答案：C

选择题

Which sentence is wrong?[ ]

A.I felt it impossible for him to take the exam.

B.I found it impossible that he might take the exam.

C.I thought that he might not take the exam.

D. In my opinion he might take the exam.

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单项选择题

等响曲线指的是在等响度条件下（）和频率之间的关系曲线。

A、声衰减

B、声压级

C、声功率

D、声能量
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