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问题 单项选择题

CS业务在呼叫建立时RNC准入拒绝，以下各项中不属于可能原因的有：（）

A.会话类业务准入门限设置偏低

B.参数“主公共信道的缺省Ec/No”设置偏大

C.邻区干扰因子设置偏大

D.基站受到了其它系统的干扰

答案

参考答案：B

写作题

绿色的田径场、高大的香樟树、曲折的走廊、阳光下的石凳、热闹的操扬、安静的教室……校园里的每个角落都有一幅美丽的图画，你最爱哪一幅？请选择一片校园最美的风景写一段文字。要求：

1、以描写、抒情的表达方式为主，情景交融。

2、使用比喻和排比修辞手法。

3、感情真实动人，语句连贯得体。

4、字数不少于200字。
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单项选择题

For each blank, choose the best answer from the four choices and write down on the answer sheet.
(66) is a one-way function that takes an arbitrarily long piece of plaintext and from it computes a fixed-length bit string.
(67) is a protocol that most USENET machines now use it to allow news articles to propagate from one machine to another over a reliable connection.
(68) is an approach preferred by cable TV providers. In this solution the fiber terminates at an optoelectrical converter and the final segment is a shared coaxial cable.
(69) is a device used to connect two separate network that use different communication protocol.
(70) is a digital-to-digital polar encoding method in which the signal level is always either positive or negative.

A．NNI

B．NRZ

C．NAK

D．NVT
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