以下选项中，（ ）是视频文件的扩展名。
- A.MIDI
- B.WMV
- C.RAM
- D.GIF
正确答案及解析
正确答案
解析
本题考查常用的文件扩展名。
MIDI（Musical Instrument Digital Interface）乐器数字接口，是编曲界最广泛的音乐标准格式，可称为“计算机能理解的乐谱”。它用音符的数字控制信号来记录音乐。
WMV（Windows Media Video）是微软开发的一系列视频编解码和其相关的视频编码格式的统称。
RAM是一种音频格式，采用了“音频流”技术，所以非常适合网络广播。
GIF（Graphics Interchange Format）的原义是“图像互换格式”，是CompuServe公司在1987年开发的图像文件格式。
综合分析，本题选B。
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