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MIDI enables people to use ______ computers and electronic musical instruments. There are actually three components to MIDI, the communications " ______", the Hardware Interface and a distribution ______ called "Standard MIDI Files". In the context of the WWW, the most interesting component is the ______ Format. In principle, MIDI files contain sequences of MIDI Protocol messages. However, when MIDI Protocol ______ 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

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MIDI enables people to use ______ computers and electronic musical instruments. There are actually three components to MIDI, the communications " ______", the Hardware Interface and a distribution ______ called "Standard MIDI Files". In the context of the WWW, the most interesting component is the ______ Format. In principle, MIDI files contain sequences of MIDI Protocol messages. However, when MIDI Protocol ______ 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

MIDI enables people to use ______ computers and electronic musical instruments. There are actually three components to MIDI, the communications " ______", the Hardware Interface and a distribution ______ called "Standard MIDI Files". In the context of the WWW, the most interesting component is the ______ Format. In principle, MIDI files contain sequences of MIDI Protocol messages. However, when MIDI Protocol ______ 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. personal
B. electronic
C. multimedia
D. network

某软件工程项目各开发阶段工作量的比例如下表所示 需求分析 概要设计 详细设计 编码 测试 0.29 0.13 0.17 0.10 0.31 假设当前己处于编码阶段,3000行程序己完成了1200行,则该工程项目开发进度已完成的比例是______。

A. 29%
B. 45%
C. 59%
D. 63%

Certificates are ______documents attesting to the ______ of a public key to an individual or other entity. They allow verification of the claim that a given publickey does in fact belong to a given individual. Certificates help prevent some one from using a phony key to ______someone else. In their simplest form, Certificates contain a public key and a name. As commonly used, a certificate also contains an ______ date, the name of the CA that issued the certificate, a serial number, and perhaps other information. Most importantly, it contains the digital ______ of the certificate issuer. The most widely accepted format for certificates is X.509 , thus, Certificates can be read or written by any application complying with X.509.

A. communication
B. computation
C. expectation
D. expiration

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