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问题 单项选择题

在公路项目经济评价指标中，计算期内现金流量的净现值等于零的折现率成为()。

A.净现值率

B.内部收益率

C.基准收益率

D.投资利税率

答案

参考答案：B

解析：本题考查项目经济评价指标。内部收益率是项目在计算期内现金流量的净现值等于0的折现率。

选择题
下列计算正确的有
①（
1
2
）2=4            ②
42
5
=
16
25
           ③-(-
1
9
)2=
1
81
  ④-（-14）=1        ⑤-[-（-1）]=-1（　　）
A．0个B．1个C．2个D．3个
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填空题

用所给词的适当形式填空。

1. Some __________ (read) are going to eat more __________ (vegetable).

2. Three students __________ (make) their New Year's r__________ yesterday.

3. They __________ (build) a bridge over the river two years ago.

   And they__________ (build) another one next year.

4. Look! That's our new teaching __________ (build). It's great.

5. She wants to find a job as a l__________ teacher in China.

6. __________ (lady) and gentlemen! Please keep quiet.

7. Every year a lot of ___________ (foreign) come to China.

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