[Recently,telecommunication carriers has been building All-IP core networks in orderto effectively support various kinds of fixed and mobile broadband services,such as upanddown-loading Youtube and SNS（Social Networking Services）with rich video file,as wellas broadband mobile Internet services.Sucb All-IP network is called NGN（Next GenerationNetwork）,which guarantees secure authentication and QoS such as the bandwidth and thedelay.From the service point of view,convergence of fixed and mobile communications,known as FMC（Fixed Mobile Convergence）is becoming a key in creating new services andexpanding the market.]
From the paragraph above,we can see that（1）can be defined as a network that caneffectively support various kinds of fixed and mobile broadband services,with guaranteedQoS in terms of（2）and etC.And the key to develop new services and gain larger marketshare should be（3）._________.

[单选题][Recently,telecommunication carriers has been building All-IP core networks

[单选题][Recently,telecommunication carriers has been building All-IP core networks

[单选题]Recently,telecommunication carriers has been building ( ) core networks in order to effectively support various kinds of fixed and mobile broadband services.A． NGN B.social network C. mobile network D. AII -IP

[试题](Recently， telecommunication carriers has been building All-IP core networks in order to effectively support various kinds of fixed and mobile broadband services，such as up-and down-loading You tube and SNS（Social Networking Services）with rich video f

[单选题]Recently, there has been many orders ____ the said goods.A . forB . onC . withD . about

[单选题]The building of the bridge has been( )up by the heavy rain.A.completedB.bro

—Little Jim has been eating sweets all day.—It’s no ________ he is not hungryA.

Building this bridge has already been too _ in terms of lives.A. costlyB. valuab

[单选题]An analyst has recently determined that only 70 percent of all U.S. pension

According to various research studies in the field of online social networks, it