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问题 单项选择题

选择语言材料是为了使我们说的话、写的文章具有准确性，就是为了能够把客观事物在我们头脑里的反映准确地表达出来。不仅准确，并且富有表现力，这是我们选择语言材料最根本的考虑。

本段支持的主要观点是（）。

A．写文章时应注意语言的准确性

B．语言材料是语言表达最重要的要素

C．语言应该富有表现力

D．语言应客观地表现我们头脑中的意思

答案

参考答案：A

单项选择题

在主要西方国家基本形成行政集权民主制的突出表现是( )

A．政府机构迅速膨胀

B．削弱代议民主制下议会的传统权力来缓解议会制政府内阁更迭频繁造成的危机

C．权力的变化经历了由上院向下院，再由下院向内阁转移的过程

D．作为行政首脑的总统或首相权力的扩张
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单项选择题

Networks can be interconnected by different devices. In the physical layer, networks can be connected by (11) or hubs, which just move the bits from one network to an identical network. One layer up we find bridges and switches, which operate at data link layer. They can accept (12) ,examine the MAC address, and forward the frames to a different network while doing minor protocol translation in the process. In the network layer, we have routers that can connect two networks. If two networks have (13) network layer, the router may be able to translate between the packer formats. In the transport layer we find transport gateway, which can interface between two transport connections. Finally, in the application layer, application gateways translate message (14) . As an example, gateways between Internet e-mail and X.400 e-mail must (15) the e-mail message and change various header fields.

12（）

A.frames

B.packets

C.packages

D.cells
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