【单选题】【消耗次数:1】
数字、模拟信号转换的专用设备是( )
调制器
解调器
调制解调器
以上都不对
参考答案:
复制
纠错
相关题目
【单选题】 调制解调器中的调制器的作用是( )。
①  将不归零信号转换为归零信号
②  将数字数据转换为模拟信号
③  将模拟信号转换为数字数据
④  将模拟数据转换成数字信号
【判断题】 调制解调切实调制器和解调器的的组合器件。
①  正确
②  错误
【单选题】 调制解调器的作用是____。
①  控制并协调计算机和电话网的连接
②  负责接通与电信局线路的连接
③  将模拟信号转换成数字信号
④  实现模拟信号与数字信号相互转换
【单选题】 调制解调器(Modem)的功能是实现( )。
①  数字信号的编码
②  模拟信号的放大
③  数字信号的整形
④  模拟信号与数字信号间的转换
【单选题】 调制解调器(MODEM)的主要功能是 ( ) 。
①  模拟信号的放大
②  数字信号的整形
③  模拟信号与数字信号的转换
④  数字信号的编码
【单选题】 调制解调器用于()。
①  在普通电话线上发送和接收数据
②  语音识别
③  连接计算机和局域网
④  字符识别
【判断题】 在宽带接入中,调制解调器是成对使用的。
①  正确
②  错误
【单选题】 以下哪个速率不可能是调制解调器的速率?( )
①  56Kbps
②  33.6Kbps
③  22.8Kbps
④  128Kbps
【单选题】 以下哪个速率不可能是调制解调器的速率?( )
①  56Kbps
②  33.6Kbps
③  22.8Kbps
④  128Kbps
【单选题】 在数据通信中,利用电话交换网与调制解调器进行数据传输的方法属于()。
①  频带传输
②  宽带传输
③  基带传输
④  IP传输
随机题目
【单选题】 I’ m____ that he didn’ t come.
①  astonished
②  astonishing
③  astonish
④  to astonish
【单选题】 ____ is announced in the papers, our country has launched a large scale movement against smuggling and fraudulent activities in foreign currency exchange deals.
①  What
②  As
③  Which
④  That
【单选题】 The ____ crown jewels are kept in the Tower of London.
①  valued
②  valueless
③  invaluable
④  usable
【单选题】 Though ____ rich, she was better off than at any other period in her life.
①  by means of
②  within her means
③  by all means
④  by no means
【单选题】 You ____ that letter to James. However, you didn’t.
①  ought to write
②  ought to have written
③  should write
④  should be writing
【单选题】 She found herself____ forward more eagerly to the holiday at home.
①  looking
②  bringing
③  desiring
④  expecting
【单选题】 When Sarah and I ____ on an article for the school newspaper, we found it difficult to work together.
①  compiled
②  gathered
③  collaborated
④  collected
【单选题】 ____ for a long time, the fields are all dried up.
①  There has been no rain
②  Having no rain
③  There having been no rain
④  There being no rain
【单选题】 Then Johnny reached quickly ______ the other pot, vigorously boiling on the stove.
①  down
②  out
③  for
④  to
【单选题】 The game was fixed for today but it has been____ for a week.
①  transfered
②  delayed
③  translated
④  postponed