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 A Digital Code Has Wide Applications B Floppy Disks Are Outdated C CDs Are Durable D CD’s Working Principle Is Explained E

A Digital Code Has Wide Applications B Floppy Disks Are Outdated C CDs Are Durable D CD’s Working Principle Is Explained E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B  Floppy Disks Are Outdated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
*
选项
答案F
解析 第三段第三句“Space probes communicate with their ground station on earth using digital codes，”是选F的依据。
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