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 A Digital Code Has Wide Applications B Floppy Disks Are Outdated C CDs Are Durable D CD’s Working Principle Is Explained E

A Digital Code Has Wide Applications B Floppy Disks Are Outdated C CDs Are Durable D CD’s Working Principle Is Explained E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B  Floppy Disks Are Outdated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
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选项
答案C
解析 第二段说到在CD机上还原数码时依靠的是激光发射装置和接收器。由此我们可以推论出激光发射器和接收器是CD机的主要部件。所以C是答案。
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