在投资项目的盈利能力分析中，若选取的基准年发生变化，则净现值（NPV和内部收益率（I

(2014·福建名校质量检查)The United Nations is trying to free the world________the threat of war.

A．at　

B．in

C．by　

D．from

He was watching TV. _____, his wife was cooking.[ ]

A. while    

B. when    

C. at the time    

D. at the same time

使用一种试剂，可以把KCl、AlCl₃、Ba（NO₃）₂、CH₃COOH四种溶液区别开来，所用试剂为（    ）

A．NaOH

B．BaCl₂

C．Na₂CO₃

D．AgNO₃

—How_____ is it from your school to the hospital?

—Five miles.[ ]

A. long            

B. many        

C. much        

D. far

后主继位，五路敌军犯境，诸葛亮如何退东吴的十万大军？