OnOctober 12, 1989, someChinesescientistswereworkingatthecomputerstolookforinformationtheyneeded. Suddenlytheysawalotofverybrightspotscrossingthecomputerssscreens. Atthesametimethecomputerswereworkingmuchslower. Tofindoutwhatwashappeningtheystoppedtheirworktochecksomepartsofthecomputers. Totheirhorror, theyfoundoutthatmostoftheirstoredinformationwasgotridofbycomputerviruses (病毒)! Obviouslyallthesecomputershadbeeninfectedbycomputerviruses.
Itissaidthatthecomputervirusesweremadebyagroupofyoungmenfondofplayingtricks. Theyallhadexcellenteducation. Theycreatedthevirusesjusttoshowtheirintelligence (才智). ThesekindsofcomputervirusesarenamedJerusalem(耶路撒冷)Viruses. Thesevirusescanstayincomputersforalongtime. Whenthetimecomestheywillattackthecomputersbyloweringthefunctions (功能), damagingtheirnormalprogramsorevengettingridofalltheinformation.
WenowcometoknowthatJerusalemVirusesoftenattackcomputersonFridaysandthattheyarespreadingtoalotofcomputers. AmongthecountriesthatsufferedcomputerviruseslastyearareBritain, Australia, SwitzerlandandtheU.S. Butfillnow , howtogetridoftheterriblevirusesremainsaproblem.
56.Thegroupofyoungmencreatedtheviruseto________.
A. damagethecomputers
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