时间:2017-10-03 01:39:43
1、单项选择题 通信网络的发展大体上可分为()个阶段。
A、二
B、三
C、四
D、五
2、单项选择题 关于CDMA2000组网设备,以下正确的说法是()。
A.室内分布系统不能采用直放站
B.射频拉远模块使用光纤作为传输部件,因此拉远距离没有限制
C.直放站扩展了施主基站覆盖范围,进而间接增加了施主基站的容量
D.功分器会给前向链路引入至少3dB损耗
3、问答题 简述什么是通信网的数字化。
4、填空题 IP电话平均每路电话实际占用的带宽为()。
5、单项选择题 &nb来源:91考试网 www.91eXam.orgsp;下列哪些书不属于历史书籍()
A.《春秋》
B.《资治通鉴》
C.《天工开物》
D.《史记》
6、单项选择题 IP电话中采用共轭结构算术码本激励线性预测编码法,编码速率为()kbit/s。
A、4
B、8
C、12
D、16
7、判断题 理想的个人通信,就是任何人在任何时间都能与任何地方的另一个人进行任何形式的通信。()
8、多项选择题 成人发生阻塞性黄疸时,胆红素可见于:()
A.肝细胞
B.小胆管
C.肾小管上皮细胞
D.豆状核
E.脊髓
9、单项选择题
完形填空:下面的短文有l5处空白,请根据短文内容为每处空白确定l个最佳选项。
Obesity(肥胖) Causes Global Warming.
The list of ills attributable to obesity keeps growing: Last week, obese people were accused of causing global warming.
This ______(51)comes from Sheldon Jacobson of the University of Illinois, US, and a doctoral student, Laura McLay. Their study ______(52) how much extra gasoline is needed to haul fat Americans around. The answer, they say, is a billion gallons of gas per year. ______(53)
There has been ______(54) for taxes on junk food in recent years. US economist Martin Schmidt suggests a tax on fast food ______(55)to people’s cars. "We tax cigarettes partly because of their health cost," Schmidt said. "Similarly, leading a lazy life style will end ______(56) costing taxpayers more."
US political scientist Eric Oliver said his first instinct was to laugh at these gas and fast food arguments. But such ______(57) are getting attention.
At the US Obesity Society's annual meeting, one person ______(58) obesity with car accident deaths, and another correlated obesity with suicides. No one asked whether there was really a cause-and-effect relationship. " The funny thing was that everyone took it ______(59)." Oliver said.
In a 1960s study, children were ______(60) drawings of children with disabilities and without them, and a drawing of an obese child. They were asked ______(61) they would want for a friend? The obese child was picked last.Three researchers recently repeated the study ______(62) college students. Once again, ______(63) no one, not even obese people, liked the obese person. " Obesity was stigmatized." the researchers said.
But, researchers say, getting______ (64) is not like quitting smoking. People struggle to stop smoking, and, in the end, many succeed. Obesity is different. Science has shown that they have limited personal control over their weight Genes also______ (65) a part.
61.(单项选择题)
A.what
B.where
C.why
D.which
10、问答题 简述IP电话网主要采用哪几种技术。
11、问答题 阐述星形网结构的优缺点。
12、填空题 管理网是为提高全网质量和充分利用()而设置的。
13、单项选择题 GSM电话网构成()网络结构。
A、一级
B、二级
C、三级
14、问答题 阐述固定电话网的组成。