既在京沪线上又在陇海线上的城市是[ ]
A、石家庄
B、上海
C、连云港
D、徐州
答案：D
下列选项中构成计算机犯罪可能性最小的是
A．操作系统缺陷
B．窃取或转卖信息资源
C．盗用计算机时
D．制造计算机病毒
Once you get _______ something, it is very hard to ________. [ ]
A. addicted to; rid yourself of it
B. used to; rid yourself of it
C. accustomed to; be got rid of it
D. addicted to; get away with it
