露天煤矿的开采给山西省的生态环境带来了很大压力。据此回答1-2 题。 1．在开采

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．The repeater

B．The hub

C．The bridge

D．The router

清末民初，山西有一首歌谣：“破戏台，烂秀才，小足板子洋烟袋；火车站，德律风（telephone），大足板子毕业生”。歌谣反映了当时

A．社会转型的苦痛

B．传统旧俗遭冲击

C．新旧事物的对立

D．新旧事物的并存

学习障碍包括哪些特征（）？

A.差异性

B.集中性

C.缺陷性

D.和排除性

对页面显示进行缩放的方法有下列哪几种（）

A、使用放大镜工具

B、使用View（视图）菜单下的ZoomIn（放大）、ZoomOut（缩小）命令

C、使用Navigator（浏览器）调板

D、使用Info（信息）调板