Unit 6 OPTICAL BREAKTHROUGH

Date: 2015-10-07; view: 549.

Exercise 1.Answer these questions.

1 What does 'CD-ROM' stand for?

2 What kind of technology is used by CD-ROM disks and drives?

3 How do you say these expressions in your language?

compact disk CD-ROM disk drive

laser technology erasable optical disk

Exercise 2.Read the sentences below, and define those which contain a technical mistake.

1 A CD-ROM disk is very different from a compact music disk

2 You need a hard disk drive to read CD-ROM disks

3 The data on a CD-ROM is read with a laser beam.

4 A typical CD-ROM disk can hold 100 MB.

5 The data on a CD-ROM can be changed or 'written' to.

6 A CD-ROM is a good way of storing large amounts of information (images, sounds, applications, etc.).

7 CD-ROM drives cannot play audio CDs.

Exercise 3.Reading.

A What are the advantages and disadvantages of optical disks? Read the text to check your answer.