— Does your uncle still smoke?

—  He given it up. It's two years ever since he _____. [ ]

A. can't have; smoked;

B. may have; smoked

C. should have; has smoked

D. should have; didn't smoke

通常情况下，下面的哪些项目是PGIS硬件基础支撑环境中SOA服务器配置方法？（）

A.安装SOA地图发布软件如ArcGISServer

B.高端PCServer，多路高频CPU

C.建议采用双机集群服务模式

D.以小型机为主，PCServer为辅助