下面哪一个不是LAN的主要特性。()
A、提供全时的局部服务
B、连接物理相邻的设备
C、提供多用户高带宽介质访问
D、运行在一个宽广的地域范围内
参考答案:D
____ in the queue for half an hour, the old man suddenly realized he had left the cheque in the car. [ ]
A. Waiting
B. To wait
C. Having waited
D. To have waited
转运子(Transporter)