A Digital Code Has Wide Applications B Floppy Disks Are Outdated C CDs Are Durable D CD’s Working Principle Is Explained E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B  Floppy Disks Are Outdated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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本试题收录于：职称英语理工类基础题库职称英语分类

职称英语理工类基础

职称英语

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A Digital Code Has Wide Applications B Floppy Disks Are Outdated C CDs Are Durable D CD’s Working Principle Is Explained E

职称英语理工类基础

职称英语

ManandComputerWhatmakespeopledifferentfromcomputerprograms?Whatisthemissingelementthatourtheoriesdon’tyet(

ThePovertyLineIntheUnitedStatesduring1992,anyfamilyoffourwithanannualcashincomeoflessthan＄14,335(beforetax

Thestaffofthecompanyarealwayscourteousandhelpful.

ThemainreadersofmedicaljournalsareAnarticledealingwithresultsfromdifferentstudiesonthesametopiciscalled

ParentsintheUnitedStatestendtoasktheirchildrenWhatdoesthesurveyindicate?

AninternationalteamofresearchscientistshascreatedanewkindofricethatcontainsVitaminA.Theresearchersusedgeneti

Policeofficersworkingonthemurderhavequestionedhundredsoffamilies.

TheeconomycontinuedtoexhibitsignsofdeclineinSeptember.

Tenyearsaftertheevent,herdeathstillremainsa(puzzle).

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