计算机化的电话交换机(CBX) 属于______技术。
A.局域网
B.广域网
C.城域网
D.计算机网络
参考答案:A
解析: 计算机化的电话交换机(CBX)属于局域网技术的范畴。
— I've taken someone else's overcoat by mistake. Is it Jack's?
— It ____ be his. He seldom wears white. [ ]
A. can't
B. mustn't
C. won't
D. shouldn't
急性肾炎患儿的休息原则。