By using MP3,a 600M-byte music CD can be (1)_____to 50M bytes or less.It can be streamed(downloaded in chunks)so that you can b

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问题 By using MP3,a 600M-byte music CD can be  (1)_____to 50M bytes or less.It can be streamed(downloaded in chunks)so that you can begin listening to the opening bars while the  (2)_____ ofthe life arrives in the background。And most important,MP3 music files retain good listening  (3)_____ that  (4)______compression schemes lacked.That  (5)_____ of features makes accessing anddistributing music on the Web practical for the first time.
(4)_____
A.earlier
B.front
C.later
D.Backward

选项 A、 
B、 
C、 
D、 

答案A

解析
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