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试卷相关题目

• 1Music is recorded onto CDs as

  A.laser beams

  B.digital codes

  C.musical notes

  D.special sounds

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• 2It can be found from the last paragraph that infrasonic waves

  A.are harmless to people's health

  B.exist in people's internal organs

  C.can be used as deadly weapons

  D.can improve eyesight

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• 3An ultrasonic sound

  A.is very loud

  B.does harm to people's health

  C.cannot be heard by people

  D.is produced by the hero in movies

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• 4It is true that the sound

  A.of nature is the most beautiful

  B.over 80 decibels is harmful to people

  C.of high intensity benefits animals

  D.in movies is pleasing to the ear

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• 5What does the author say about music、

  A.It may be harmful to people's halth

  B.It always cheers people up

  C.It is very often difficult to understand

  D.It sounds better when it is lound enough

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• 6One of the differences between CD-RWs and CD-ROMs is

  A.CD-ROMs can be used for longer time

  B.CD-ROMs cannot be rewritten on

  C.CD-RWs hold more information

  D.CD-RWs are merely used for music recording

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• 7CDs can last a long time if

  A.they are seldom used

  B.they play well and sound fine

  C.their users take good care of them

  D.they are developed with new technology

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• 8It can be inferred from the passage that

  A.CD-ROMs are more expensive than other CDs

  B.new technology for music recording is being developed

  C.the author likes listening to music

  D.flppy disks are no longer in use

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