(66) is a channel’ s capacity which directly reflects the data transfer rate of the channel. (67) functions in a NetWare network which is used to define addressing schemes. (68) is a network layer device that suports multiple LAN interfaces and segments LANs into smaller collision and broadcast domains. (69) ．is the popular LAN develped under the direction of the IEEE 802.3. (70) is a device which enables digital microcomputers to communicate across analog telephone lines.

A. The repeaterB. The hub
C. The bridge D. The router

新生儿出血症经典型，发病时间为()

A．生后24小时内

B．生后2～5天

C．生后7天

D．生后14天

E．生后1个月