用敞车装载散装生石灰、磷灰粉（土）车辆应编挂于乘坐旅客车辆前部。装有高出车帮易于窜动货物的敞、平、砂石车与乘坐旅客的车辆至少隔离3辆。
参考答案：错
第一次对代理理论作出了详细的理论阐述的是（）。
A.邓宁和弗农
B.伯利和米恩斯
C.波特
D.詹森和麦克林
For each blank, choose the best answer from the four choices and write down on the answer sheet. (71) is a channel’ s capacity which directly reflects the data transfer rate of the channel. (72) functions in a NetWare network which is used to define addressing schemes. (73) is a network layer device that supports multiple LAN interfaces and segments LANs into smaller collision and broadcast domains. (74) is the popular LAN developed under the direction of the IEEE802.3. (75) is a device which enables digital microcomputers to communicate across analog telephone lines.
A．NetBEUI
B．IP
C．IPX
D．NCP
