2. 外语
  3. Which are bigger, CD players or MP3 Players? _________________________________. What is the MP3 format? It is a very ef

Which are bigger, CD players or MP3 Players? _________________________________. What is the MP3 format? It is a very ef

admin2009-05-28  21
问题 Which are bigger, CD players or MP3 Players?
   _________________________________.

What is the MP3 format?
   It is a very efficient compression(压缩) system for_________________________________.
选项
答案music files
解析 第三段第一句话说到MP3的格式是一个存放音乐文件的压缩系统。
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