-----Have you _____ everything ready for the meeting?

----- Not yet, we need ______.

A．got; another three chairs 　

B．got; more three chars

C．prepared; other three chairs

D．prepared; three another chairs

做好室间质评工作要有一支素质较高的质控技术队伍，还应有（）

A.室内质控的基础

B.良好质控血清作为调查样本

C.定值方法可靠

D.统一测定方法及校准品

E.要有参考实验室作后盾