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问题 综合

读“我国西北地区略图”回答问题：

（1）写出图中字母代表的地理事物的名称：

①“西气东输”能源工程的起点A，地处我国的________盆地。②C是____________油田，位于_________盆地。西部地区面积最大的省区是_________。

（2）长期以来制约我国西部地区经济发展的最主要的原因是[ ]

A．资金、技术、人才匮乏  

B．农业基础薄弱

C．水土流失严重   

D．自然资源不足

答案

（1）塔里木；塔中；塔里木；新疆维吾尔自治区

（2）A

单项选择题

由于位置固定的特性，使得土地市场基本上是一个地方市场，土地必须原地出售。表明了土地市场具有( )的特点。

A．交易实体的非移动性

B．土地市场的地域性

C．土地市场的垄断性

D．土地供给弹性大
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单项选择题

(51) is a six bytes OSI layer 2 address which is burned into every networking device that provides its unique identity for point to point communication.

(52) is a professional organization of individuals in multiple professions which focuses on effort on lower-layer protocols.

(53) functions with two layers of protocols. It can connect networks of different speeds and can be adapted to an environment as it expands.

(54) is the popular LAN developed under the direction of the IEEE802.5.

(55) is the popular backbone technology for transmitting information at high speed with a high level of fault tolerance which is developed under the direction of ANSI.

（55）是（）

A.X.25

B.ATM

C.FDDI

D.SMDS
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