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问题 单项选择题

男性，7岁，右臀部肌注青霉素后，右足下垂1月。查体：跛行，右胫骨前肌肌力0级。推测肌电图检查可能出现的典型表现为

A．插入电位减弱
B．运动单位电位延长
C．束颤电位
D．纤颤电位
E．长时限运动单位电位

答案

参考答案：D

单项选择题

常用的统计数是( )的基础。

A．定性分析

B．定量分析

C．对比分析

D．定性定量相结合分析
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单项选择题

Frame Relay is simplified form of (71) ,similar in principle to (72) , in which synchronous, frames of data are routed to different destinations depending on header information. Packets are routed throught one or more Virtual Circuits known as (73) . Most Virtual Circuits are (74) ,which means that the network provider sets up all DLCI connections at subscription time. (75) are also part of the Frame Relay specification. They privide a link that only lasts only as long as the session.

A．Datagram Switching

B．Datagram Routing

C．Packet Switching

D．Packet Routing
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