A Digital Code Has Wide Applications B Floppy Disks Are Outdated C CDs Are Durable D CD’s Working Principle Is Explained E

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问题 A  Digital Code Has Wide Applications
B  Floppy Disks Are Outdated
C  CDs Are Durable
D  CD’s Working Principle Is Explained
E  CD-RWs Play Better Than CD-ROMs
F  CDs Are of Many Formats
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选项

答案C

解析 第五段说的是CD碟片经久耐用,1982年上市的CD碟片至今还能使用,其音质依旧。现在上市的CD,更加耐用,如果使用得当,其寿命可达70~200年。选项C用了durable予以概括是很恰当的,所以,C是答案。
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