下列影响人口移动的因素中属于拉力因素的是 ①适宜的气候 ②廉

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问题选择题

下列影响人口移动的因素中属于拉力因素的是

①适宜的气候 ②廉价的土地 ③过多的人口 ④食品供应短缺

A．①② B②③ C．③④ D．①④

答案

答案：A

本题考查人口迁移。人口迁移的拉力即迁入地的优势条件，故①②符合。

单项选择题

For each blank, choose the best answer from the four choices and write down on the answer sheet.

（）is a channel’s capacity which directly reflects the data transfer rate of the channel.

（）functions in a NetWare network which is used to define addressing schemes.

（）is a network layer device that supports multiple LAN interfaces and segments LANs into smaller collision and broadcast domains.

（）is the popular LAN developed under the direction of the IEEE802.3.

（）is a device which enables digital microcomputers to communicate across analog telephone lines.

A．The repeater

B．The modem

C．The hub

D．The printer

名词解释

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