首页
登录
职称英语
Online services are managed by a host system that maintains a base of inform
Online services are managed by a host system that maintains a base of inform
游客
2024-06-27
14
管理
问题
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 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 interface (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.
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.
Besides offering a great number of different information bases, ranging from full-text journal libraries to reports of missing children, online services allow users to, for example, reserve airline tickets, 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.
选项
A、a base of information
B、dumb terminals
C、a host system
D、a satellite
答案
A
解析
本题为推理题。根据文章第一段第一句话"Online services are managed by a host system that maintains a base of information available to satellite users.”可知,网络服务通过中央系统来管理,而中央系统则具有供网络使用者用的信息库。由此可见,网络服务为使用者提供信息库。因此答案为A。
转载请注明原文地址:https://tihaiku.com/zcyy/3651858.html
相关试题推荐
Weshouldkeeptheworld(inform)______ofthetremendoussuccessesChinahasach
Youarerequiredtowriteanoticeaccordingtothefollowinginformationgiven
YouarerequiredtowriteaninformalletterinthenameofEdwardDickenstobo
A--cyberloveB--informationsuperhighwayC--downloadD--webhostingE--wideband
Onlineservicesworkbyprovidinguserswith______.[br]Ifyouwanttoreadfu
Onlineservicesworkbyprovidinguserswith______.[br]Howcantheusersoft
ThefollowingcontainsthemaininformationofDirectionsforUse.Youarerequi
A—RelevanceofmotivationtheoriesB—SystematicTrainingC—Personnelmanagement
Greateffortsshouldbemadetoinformthepublicoftheterribleconsequenceso
ThePresidentofHarvardpioneeredtheelectivesystemby______studentswerea
随机试题
Inatelephonesurveyofmorethan2,000adults,21%saidtheybelievedthe
Whydidthetrainingprogramplaysuchanimportantrolenowadays?[br]Accordin
Iwillnotlendthebooktoyou______youcanreturnitintime.A、incaseB、so
Surprisingly,nooneknowshowmanychildrenreceiveeducationinEnglishho
在项目决策阶段,可作为工程投资确定的重要依据的工程技术文件有()。A.项目意
在公路设计时,一般按15年预测设计交通量的有()。A.高速公路 B.一级公路
对社区社会组织的管理,主要体现在以下()个方面。A.加强党的领导 B.促进能
基因工程的操作程序可简单概括为A.将载体和目的基因分离、线性化并鉴定 B.将重
舌系带与伞襞之间的三角区域内,清晰可见的结构是A.舌深动脉 B.舌深静脉 C
慢性增生性牙髓炎诊断的主要依据是A.髓腔内可探及牙髓息肉 B.不敢用患牙咀嚼
最新回复
(
0
)