was designed many years ago，with a goal in mind：transmitting the human voice in a more-or-less recognizable form．

A．DWDM

B．PSTN

C．internet

D．WLAN

[单选题]F．or many years, the principle goal of computer(73)was to write short pieces of code that would execute quickly. The(74)needed to be small, because memory was expensive, and it needed to be fast, because processing power was also expensive.A．usersB．p

[试题]Manyyearsago，alotoffactorieswere_______frombigcitiestothemountainousareasincaseofwar.A.transferredB.transformedC.transmittedD.transported

[单选题]Social customs and ways of behaving are changing.（ 1 ） was considered impol

[单选题]Social customs and ways of behaving are changing.（ 1 ） was considered impol

[单选题]Social customs and ways of behaving are changing.（ 1 ） was considered impol

[单选题]Social customs and ways of behaving are changing.（ 1 ） was considered impol

[单选题]Today Newton is a very clean place. Many years ago, however, there were mil

[单选题]Today Newton is a very clean place. Many years ago, however, there were mil

[单选题]Today Newton is a very clean place. Many years ago, however, there were mil

[单选题]Today Newton is a very clean place. Many years ago, however, there were mil