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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