MIDI enables people to use (11) computers and electronic musical instruments. There are actually three components to MIDI, the communications" (12) .", the Hardware Interface and a distribution (13) called "Standard MIDI Files". In the context of the WWW, the most interesting component is the (14) Format. In principle, MIDI files contain sequences of MIDI Protocol messages. However, when MIDI Protocol (15) are stored in MIDI files, the events are also time-stamped for playback in the proper sequence. Music delivered by MIDI files is the most common use of MIDI today.
A．messages
B．packets
C．frame
D．information
参考答案：A
解析：
[分析]： MIDI使人们能够使用多媒体(multimedia)计算机和电子音乐设备。实际上，MIDI由三个部分组成：通信“协议(protocol)”、硬件接口和被称为标准MIDI文件的发布格式(format)。在WWW的内容中，最令人感兴趣的部分是音频(Audio)格式。从原理上看，MIDI文件包含了一系列MIDI协议消息。然而，当MIDI协议消息(messages)被存储在MIDI文件时，事件也都被加上时间戳，以便能按正确的顺序进行回放。目前，通过MIDI文件传递音乐是MIDI最主要的应用。
