研究是一种较高层次的信息加工整理步骤，它对大量信息综合分析的基础上，经过分析、判断、思考，产生具有( )的信息。

A．系统性

B．新价值

C．深度

D．新发现

—Xiao Hua looks unhappy, doesn’t she?----Yes, let’s go and ask______.

A. what wrong is with her                                     B. What wrong was with her

C What is wrong with her                                     D. What was wrong with her.