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问题 单项选择题

常用的润滑方式可分为（）2大类。

A、间歇式供油和断点式供油

B、间歇式供油和连续式供油

C、断点式供油和连续式供油

D、间歇式供油和强制式供油

答案

参考答案：B

填空题

我国北方以______盐场最为著名．
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单项选择题

76． (1) is a channel’s capacity which directly reflects the data transfer rate of the channe1.
(2) functions in a NetWare network which is used to define addressing schemes.
(3) is a network layer device that supports multiple LAN interfaces and segments LANs into smaller collision and broadcast domains.
(4) is the popular LAN developed under the direction of the IEEE802.3.
(5) is a device which enables digital microcomputers to communicate across analog telephone lines.

(3)

A．The repeater

B．The hub

C．The bridge

D．The router
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