假设数字信道的带宽为3100Hz,采用十六进制传输,无噪声时该数字信道的容量C为()

题型:单项选择题

问题:

假设数字信道的带宽为3100Hz,采用十六进制传输,无噪声时该数字信道的容量C为()。

A、6200bit/s

B、12400bit/s

C、18600bit/s

D、24800bit/s

考点:数据通信机务员数据通信机务员题库
题型:单项选择题

根据短文内容,完成下列各题。

Traveling is a relaxing and pleasing activity. Do you want to travel? If you do, you’d better pay attention to these things:

Choose the place you like to go. Before going on a trip, you need to decide where to go. You won’t have fun if you go to a place where you don’t like to go. This is very important if you take a trip.

Learn about the customs(风俗) of the local residents(当地居民). During the traveling, sometimes you need to communicate with the local residents. If you learn about their customs before you go there, you will get on well with them easily.

Choose the girth time to go. Wherever you go, 你都有必要了解天气情况。When the weather is too hot on too cold, you’d better not go there. And you should know if it is often rainy, cloudy or sunny.

Pay attention to health had safety. During the traveling, you can enjoy different diets. You should pay attention to the sanitation(卫生). Keeping healthy is very important. Don’t go to some places alone. This is also important.

Traveling is very exciting. Prepare for it carefully, and you will feel the pleasure of traveling.

A.回答问题。

小题1:Why do you need to learn about the customs of the local residents?                    .

B.将下面两个句子改为同义句。

小题2:Keeping healthy is very important.

         very important            keep healthy.

小题3:When the weather is too hot or too cold, you’d better not go there.

You’d better go there when the weather is              too hot         too cold.

小题4:将文中画线的英文句子译成中文。                                           .

小题5:将文中的中文句子译成英文。                                               .

题型:单项选择题

主板上市公司开展内部控制评价的频率为()

A.至少每两年一次

B.至少每年一次

C.至少每季度一次

D.至少每月一次

题型:单项选择题

基站蓄电池的最佳环境温度是:()。

A、25-30摄氏度

B、10-15摄氏度

C、15-20摄氏度

D、20-25摄氏度

题型:单项选择题

简述成球系统设备开机、停机顺序。

题型:单项选择题

(三)

[背景资料]

某装饰公司承接了寒冷地区某商场的室内、外装饰工程。其中,室内地面采用地面砖镶贴,吊顶工程部分采用木龙骨,室外部分墙面为铝板幕墙,采用进口硅酮结构密封胶、铝塑复合板,其余外墙为加气混凝土外镶贴陶瓷砖。施工过程中,发生如下事件:

事件一:因木龙骨为甲供材料,施工单位未对木龙骨进行检验和处理就用到工程上。施工单位对新进场外墙陶瓷砖和内墙砖的吸水率进行了复试,对铝塑复合板核对了产品质量证明文件。

事件二:在送待检时,为赶工期,施工单位未经监理工程师许可就进行了外墙饰面砖镶贴施工,待复验报告出来,部分指标未能达到要求。

事件三:外墙面砖施工前,工长安排工人在陶粒空心砖墙面上做了外墙饰面砖样板件,并对其质量验收进行了允许偏差的检验。

指出事件三中外墙饰面砖样板件施工中存在的问题,写出正确做法,补充外墙饰面砖质量验收的其他检验项目。

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