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[复合型非选择题]男性，44岁。因车祸伤后导致左手指夹捏功能丧失，手指屈曲活动不协调，手的握力减弱，环、小指呈爪形手畸形。

根据体征，诊断为（）

A.桡神经瘫痪

B.正中神经瘫痪

C.尺神经瘫痪

D.臂丛神经瘫痪

E.以上都不是

答案

参考答案：C

单项选择题

火炬及排气筒，经常采用的形式是（）。

A．自立式

B．塔式

C．拉线式

D．风缆绳式
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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 (66) or Hubs, which just move the bits from one network to an identical network. One layer up we find bridges and swiches, which operate at data link layer. They can accept (67) ,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 netwoks. If two networks have (68) network layer, the router may be able to translate between the packet formats. In the transport layer we find transport gateway, which can interface between the two transport connections. Finally, in the application layer, application gateways translate message (69) . As an example, gateways between Internet e-mail and X. 400 e-mail must (70) the e-mail message and change various header fields.

（67）是（）

A.frames

B.packets

C.packages

D.cells
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