-- Have you each got a computer in your office?

-- Of course.        of our work           by the computer.

A．Two thirds, are done

B．Two third, were done

C．Three quarters, is done

D．Three fourth, was done

自杀的二级预防包括（）

A.普及心理健康知识

B.早期发现

C.早期诊断

D.建立自杀的急诊救治系统

E.早期治疗