（）等经济学家从不同角度研究丰富和深化了国家创新系统理论。

A.弗里曼

B.纳尔逊

C.佩特尔

D.伦德瓦尔

E.波特

What’s the attitude of many old senior officers for a minor fire?（）

A.They would like to call out all hands out for it

B.They would rather handle themselves, then call out all hands

C.They prefer to put it out by themselves

D.They think it is difficulty to call out all hands for a minor fire