Circuit-switching technology is used in Publish SwitchedTelephone Network(PSTN),Global System for Mobile Communications(GSM) and codeDivision Multiple Access (CMDA) .It is a ( ) information transfer mode.

[单选题]Circuit-switching technology is used in Publish Switched Telephone Network(PSTN), Global System for Mobile Communications(GSM) and code Division Multiple Access (CMDA) . It is a ( ) information transfer mode.A . connection orientedB . connectionles

[试题]C．ircuit Switching is problematic because data communications is（），that is， it is typically dominated by short bursts of activity with long periods of（）.A．reliable B．bursty C．digital D．continuous A．latency B．transmission C．delay D．inactivity

[单选题]Circuit Switching is problematic because data communications is（6.1），that i

[单选题]Circuit Switching is problematic because data communications is（6.1），that i

[单选题]New technology was used in teaching. As a result, not only _____ , but students became more interested in the lessons.A． saved was teachers’ energy B. was teachers’ energy savedC． teachers’ energy was saved D. was saved teachers’ energy

[单选题]A．s they access the corporate network, mobile and remote users inadvertently can infect the network with(72) and worms acquired from unprotected public networks.A．virusesB．diseaseC．germsD．sickness

[单选题]（） is based on logistics network, but more computerized and systematized than logistics operationA . Virtual logisticsB . Imaginary logisticsC . Thinking logisticsD . Logistics planning

[单选题]Most of the widely used global security indexes are:A.price-weighted.B.equa

[单选题]G．DS（Global Distribution System）是指（ ）A．应用于民航的常旅客系统B．应用于民航的客户系统C．应用于民航的收益管理系统D．应用于民航和旅游服务的全球性信自系统

[名词解释] 英译中：Global Positioning System