By　using(26),　a　600M　-byte　music　CD　can　be　compressed　to　50M　bytes　or　less.　It　can　be　streamed(downloaded　in　chunks)　so　that　you

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问题 By　using(26),　a　600M　-byte　music　CD　can　be　compressed　to　50M　bytes　or　less.　It　can　be　streamed(downloaded　in　chunks)　so　that　you　can　begin　listening　to　the　opening　bars　while　the(27)of　the　file　arrives　in　the　background.　And,　most　important,　the　music　files　of　this　kind　retain　good　listening(28)　that　earlier(29)　schemes　lacked.　That(30)　of　features　makes　accessing　and　distributing　music　on　the　web　practical　for　the　first　time.

选项 A、JPG
B、MP3
C、MP4
D、VOD

答案B

解析

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