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All of the technological advances that have increased the quality of music have not changed the fundamental impact of recorded m

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问题     All of the technological advances that have increased the quality of music have not changed the fundamental impact of recorded music. Electronic engineering furnishes products which are replaced so(1)______. It is easy to forget the importance they held at the time of their(2)______. Before the advent of digital equipment, there were a whole(3)______ of mechanisms designed to record sound, from the original hand-cranked gramophones, (4)______ the electric phonographs, the stereo record albums, to the cassette tapes. There are two(5)______ for these developments: the precision of recording, and the(6)______ of the equipment. Digital sound engineering is the(7)______ of industrial efforts. It can(8)______ the musical sources to the minutest detail and(9)______ reproduced sounds through portable players.
     (10)______ the continuous wave of new sound facilities, entertainment has changed its form. Before the introduction of mechanical reproduction, it(11)______ almost impossible to (12)______ having an entire symphony, performed in a court setting, within a house of small size.(13)______ classical music, a single household can host a dozen different bands of (14)______ styles. The delivery of music through the electronic medium now claims high(15)______ and encourages the prospect of creating a(n)(16)______ reality. The boundary between reality and representation thus (17)______ its clear-cut definition; listeners have great difficulty in deciding which is(18)______, the live source, or the reproduced acoustics.
     (19)______ the distinction between fiction and reality is becoming more and more(20)______, lifelikeness remains the principle criterion in measuring the effectiveness of sound since the invention of the gramophone.
(6)
选项 A、motion
B、movement
C、mobility
D、responsibility
答案C
解析 词汇辨析题。根据下文出现的portable一词可知此处要表达“设备的可移动性”。故C项mobility“移动性，灵活性”正确。motion指改变位置或地点的动作或过程：movement指运动的动作或实例，地点或位置的变化。
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