[填空题]Comparisons were drawn between the development of television in the 20th century and the diffusion of printing in the 15th and 16th centuries. Yet much had happened ________As was discussed before, it was not ______ the 19th century that the newspaper became the dominant pre- electronic ______ , following in the wake of the pamphlet and the book and in the________of the periodical. It was during the same time that the communications revolution________ up, beginning with transport, the railway, and leading________ through the telegraph, the telephone, radio, and motion pictures________ the 20th-century world of the motor car and the airplane. Not everyone sees that process in________ It is important to do so. 　　It is generally recognized,________ , that the introduction of the computer in the early 20th century,________by the invention of the integrated circuit during the 1960s, radically changed the process,________its impact on the media was not immediately________As time went
A. A．process
B．company
C．light
D． form