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问题 选择题

下列词语中加点的字，读音有误的一组是

A．寒伧(chin)晕眩(xｕàn)杳(yǎo)无音信

B．赡(shàn)养惊骇(hàn)哄(hǒnɡ)堂大笑

C．颤(ｃｈàｎ)栗襟(jīn)怀咬文嚼(jiáo)字

D．伶仃(dīnɡ)辟(bì)邪伺(sì)机反扑

答案

答案：B

B(骇——hài；哄——hōnɡ)

单项选择题

红细胞沉降率加快的主要原因是()

A．血浆清蛋白含量增多

B．血浆纤维蛋白原减少

C．血浆球蛋白含量增多

D．血细胞比容改变

E．红细胞数量增多
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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.

A. repeaters B. relays C. packages D. modems
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