MIDI enables people to use （66） computers and electronic musical instruments. There are actually three components to MIDI, the communications " （67） ", the Hardware interface and a distribution （68） called "Standard MIDI Files". In the context of the WWW,the most interesting component is the （69） Format. In principle, MIDI files contain sequences of MIDI Protocol messages. However, when MIDI Protocol （70） 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．Video

B．Faxmail

C．Graphic

D．Audio

不属于异维A酸注意事项的是（）

A.用药前应排除妊娠

B.治疗期间应检查肝功能

C.治疗期间避免使用有收敛作用的化妆品

D.血脂升高应减量或停药

E.儿童慎用