求高手解答几道通信英语选择题17.woththeintroductionofdigitaldatasystem,somesubsribersthathavebeenincorporatedintothenetwork.A.canprovidevideoserviceB.transmitbroadbandprogramC.containatransmitterandreceiver

Question

求高手解答几道通信英语选择题
17. woth the introduction of digital data system, some subsribers that have been incorporated into the network.
A. can provide video service
B. transmit broadband program
C. contain a transmitter and receiver
一The celluar concept is defined by two feature
1.base station and mobile station
2. frequency reuse and cell splitting
3. sampling and coding
4.voice channel and data channel
27. These two forms of information, the speech and the data information, are the useful part of the transmission, but have to be supported .
A. by overhead information
B. by standards
C. by cell splitting
D. by many other types of information

Answer 1

上面的数字数据系统的引入,有些subsribers已纳入网络.
答：可以提供视频服务
B.传输宽带计划
C.包含发射机和接收机
一蜂窝概念由两个特征定义
1.base站和移动站
2.频率复用和细胞分裂
3.采样和编码
4.voice信道和数据信道
27.这两种形式的信息,语音和数据信息的传输,是有用的部分,但是必须支持.
A.的开销信息
通过标准
通过细胞分裂
通过许多其他类型的信息