N H C EThe Telecommunications RevolutionAIRFORCEUNIVERSITYOFENGINEERINGFOREIGNLANGUAGETEACHINGANDRESEARCHPRESSUnit 4 Section APre-reading ActivitiesText StudySummaryWritingLead-inLead-inN H C E课文 小结 预习 写作Interactive Mode IInteractive Mode IIInteractive Mode III123N H C EOur topic today is “Our topic today is “telecommunicationstelecommunications”. ”. Technically speaking, it refers to the Technically speaking, it refers to the sending and receiving of messages by sending and receiving of message
