阅读理解。

     This is a picture .In the picture you can see some hills (小山), trees and a school. You can see some boys and girls.

They are at school. The school is HongXing Middle School.   Lingling is twelve.  Fangfang is twelve, too. They are in

the same class. They are good friends. Miss Gao is their teacher.

1. _________is Fangfang and Lingling's teacher.

A. Miss Wang    

B. Miss Gao  

C. Mr Smith      

D. Mr Gao

2. The boys and girls are________________ .

A. at school      

B. at home  

C. behind the hill  

D. under a tree

3. Lingling and Fangfang are_____________.

A. in different classes    

B. in different grades    

C. eleven      

D. good friends

4. They're in_____________ 

A. HongXing Middle School    

B. hongxing middle school

C.HongXing school          

D. Hongxing middle school

5. The hills ,trees, the school and the students are _________ .   

A. in a book      

B. on the blackboard  

C. in a picture        

D. in the wall

某投资方案寿命5年，每年净现金流量见下表，折现率为10%，到第5年恰好投资全部收回。

对于同一投资方案，下列说法不正确的是( )。

A．资金成本越高，净现值越低

B．资金成本低于内部收益率时，净现值小于零

C．资金成本相当于内部收益率时，净现值为零

D．资金成本高于内部收益率时，净现值小于零