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【单选题】
调制解调器(Modem)的功能是实现 (2) 。在Internet上，可以利用 (3) 与网友直接聊天。
A.
FTP
B.
WWW
C.
Telnet
D.
BBS
参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】Online services are managed by a host system that maintains a base of information available to satellite users. Users of so-called "dumb" terminals (i. e., those without processing capability)simply a...
A.
Online services are managed by a host system that maintains a base of information available to satellite users. Users of so-called "dumb" terminals (i. e., those without processing capability)simply access the information base via programs stored on the system. Personal computer (PC) users typically access the host through a modem (调制解调器). A PC software program serves as an intece (接口)between the server and a PC, allowing the user to operate through the online system and select different databases using a keyboard or a mouse.
B.
National and regional online systems usually have local telephone numbers that PC modems can call to access either a local information base or an indirect long-distance connection, thus reducing long-distance telephone fees. Some online systems allow users ’to copy large volumes of information onto a local memory storage device, which also reduces the time the user is connected to the online system.
C.
Besides offering a great number of different information based, ranging from full-text journal li- braries to reports of missing children, online services allow users to, for example, reserve airline tick- ets, buy stocks, purchase goods, and communicate with other users. In exchange for the service, users usually pay a monthly membership fee. They may also pay to connect to various databases on the service or to download information.
【单选题】关于网络聊天时正确的是（）
A.
急于与网友见面
B.
聊天时毫无保留，切勿全盘托出
C.
建议在个人主页或博客上透露私人信息
D.
如果与陌生网友见面，可以考虑选择一个公共场所
【单选题】ITU V90调制解调器(MODEM)______。
A.
下载速率是56kb/s，上传速率是33.6kb/s
B.
上下行速率都是56kb/s
C.
与标准X.25公用数据网连接，以56kb/s的速率交换数据
D.
时刻与ISP连接，只要开机，永远在线
【单选题】调制解调器(Modern)的作用是( )。
A.
将数字脉冲信号转换成模拟信号
B.
将模拟信号转换成数字脉冲信号
C.
将数字脉冲信号与模拟信号互相转换
D.
为了上网与打电话两不误
【单选题】调制解调器(Modem)的功能是。
A.
将数字信号转换成模拟信号
B.
将模拟信号转换成数字信号
C.
兼有A和B的功能
D.
使用不同频率的载波将信号变换到不同的频率范围
相关题目：
【单选题】Online services are managed by a host system that maintains a base of information available to satellite users. Users of so-called "dumb" terminals (i. e., those without processing capability)simply a...
A.
Online services are managed by a host system that maintains a base of information available to satellite users. Users of so-called "dumb" terminals (i. e., those without processing capability)simply access the information base via programs stored on the system. Personal computer (PC) users typically access the host through a modem (调制解调器). A PC software program serves as an intece (接口)between the server and a PC, allowing the user to operate through the online system and select different databases using a keyboard or a mouse.
B.
National and regional online systems usually have local telephone numbers that PC modems can call to access either a local information base or an indirect long-distance connection, thus reducing long-distance telephone fees. Some online systems allow users ’to copy large volumes of information onto a local memory storage device, which also reduces the time the user is connected to the online system.
C.
Besides offering a great number of different information based, ranging from full-text journal li- braries to reports of missing children, online services allow users to, for example, reserve airline tick- ets, buy stocks, purchase goods, and communicate with other users. In exchange for the service, users usually pay a monthly membership fee. They may also pay to connect to various databases on the service or to download information.
【单选题】● 调制解调器(MODEM)的主要功能是 （5） 。
A.
模拟信号的放大
B.
数字信号的整形
C.
模拟信号与数字信号的转换
D.
数字信号的编码
【单选题】关于网络聊天时正确的是（）
A.
急于与网友见面
B.
聊天时毫无保留，切勿全盘托出
C.
建议在个人主页或博客上透露私人信息
D.
如果与陌生网友见面，可以考虑选择一个公共场所
【判断题】在车厢内聊天或接电话时,要注意音量适中,不要大声喧哗。
A.
正确
B.
错误
【单选题】ITU V90调制解调器(MODEM)______。
A.
下载速率是56kb/s，上传速率是33.6kb/s
B.
上下行速率都是56kb/s
C.
与标准X.25公用数据网连接，以56kb/s的速率交换数据
D.
时刻与ISP连接，只要开机，永远在线
【单选题】当通过电话线连接到ISP时，因为电话线路输出信号为哪种信号，计算技术输出信号只能通过调制解调器同电话网连接
A.
数字
B.
模拟
C.
音频
D.
模拟数字
【判断题】导游员与游客聊天时应从导游员自己感兴趣的或者关心的话题切入。()
A.
正确
B.
错误
【单选题】调制解调器(Modern)的作用是( )。
A.
将数字脉冲信号转换成模拟信号
B.
将模拟信号转换成数字脉冲信号
C.
将数字脉冲信号与模拟信号互相转换
D.
为了上网与打电话两不误
【单选题】保持工作环境的（）、清洁、肃静，工作时间不得追逐打闹、嬉笑聊天。
A.
整洁
B.
整齐
C.
干净
D.
卫生
【判断题】在职场聊天过程中最好不要涉及对方的隐私，比如年龄，收入等。
A.
正确
B.
错误
【单选题】题目（67）应选择（） A．接收邮件 B．发送文件 C．浏览网页 D．QQ聊天
A.
客户端软件与POP3服务器建立 (66) 连接来 (67) 。
【单选题】调制解调器(modem)的主要功能是
A.
模拟信号的放大
B.
数字信号的编码
C.
模拟信号与数字信号的转换
D.
数字信号的放大
【单选题】调制解调器(Modem)的功能是。
A.
将数字信号转换成模拟信号
B.
将模拟信号转换成数字信号
C.
兼有A和B的功能
D.
使用不同频率的载波将信号变换到不同的频率范围
【单选题】在电脑上进行视频聊天，必需要配备()
A.
摄像头
B.
录音机
C.
MP3播放器
D.
扫描仪