Satellite communications are so up-to-date that even when ________ in the middle of

They were successful ______ a communication satellite.A、launchB、to launchC、in launching

Communication between oldor young is not so difficult as you think. （)

Are CP and PP equally important in communication？（)

From thousands of kilometers above our earth, a communications satellite ______ a signal f

Changes in the technology of communication are occurring so rapidly that we human beings

There are two kinds of cross－cultural communication: （) communication and bilateral communication.