() can be regarded as a general-purpose digital network capable of supporting a wide range of services such as voice, data and image. A.Local area networks B.Integrated services digital networks C.Packet switching networks D.Mobile communication networks

() can be regarded as a general-purpose digital network capable of supporting a wide range of services such as voice, data and image.
A.Local area networks
B.Integrated services digital networks
C.Packet switching networks
D.Mobile communication networks

出自：河南师范大学-计算机科学与技术-专业英语

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