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

在甲状腺大部分切除手术后应指导患者

A．甲亢患者术后立即停服碘剂

B．术后2～4天做颈部运动

C．坐起时将手放于颈后支撑头部重量

D．术后当天进食热流食

E．颈部放热水袋以促进伤口愈合