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问题 单项选择题

香港新鸿基公司董事会决议规定，在大陆的投资不能超过其全部投资的10%，这是基于( )的考虑结果。

A．大陆政策多变
B．占领世界投资市场
C．风险转移
D．投资组合

答案

参考答案：D

填空题

按钮分为常开的（）、常闭的停止按钮和复口按钮。
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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.

（53）是（）

A. The hub

B. The bridge

C. The router

D. The proxy
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