填空题

We are rapidly near the end of this course in the history of (36) music. We have covered several centuries in a very short time. Much too short to do the music (37) , of course, but then this year is the (38) course. From now until the end of the term, we’ll be talking about and listening to (39) music. You probably already know that it was in the 1950’s that musical (40) and synthesizers first appeared in university. The first (41) synthesizers were sold about this time too. The (42) and complexity of these (43) have now increased to the point they can produce almost any kind of sound. (44) . You know I don’t share this view, but I do agree we are in the midst of a ;evolution in instrument design. (45) .Remember we’ve already studied a similar case in the early nineteenth century when the piano replaced the harpsichord and modem brass and wind instruments came into being. (46) . Well, just look at it. Only about 400 dollars for an electronic keyboard to nearly 3,000 dollars for a piano. Naturally, this has done a lot of increase sales of electronic instruments. But I don’t think even the most ardent supporters of electronic instruments expect them to completely replace acoustic instruments.