问题
单项选择题
By using MP3, a 600M-byte music CD can be (70) to 50M bytes or less. It can be streamed (downloaded in chunks)so that you can begin listening to the opening bars while the (71) of the file arrives in the background. And, most important, MP3 music files retain good listening (72) that (73) compression schemes lacked. That (74) of features makes accessing and distributing music on the Web practical for the first time.
A．add
B．combination
C．difference
D．condition
答案
参考答案：B
解析： MP3技术，可以将600MB的CD压缩(compressed)为50M或者更小。音乐可以被流式下载，即当文件的一部分(rest)刚下载到后台处理的时候，音乐已经开始播放了。更重要的是，MP3音乐文件仍保持着良好的质量(quality)，而这正是早期的(earlier)压缩力。案所缺乏的。这些特点的结合(combination)使得在网上发布和存取音乐第一次成为可能。