A computer virus is a computer program that is created to make and spread(71)of itself.A.p

● A （75） infected computer may lose its data. （75）A. file B. data base C. virus D. progra

● A （75） infected computer may lose its data. （75）A． file B． data base C． virus D． program

● The most important program on any computer is （73） . （73）A. Office 2000 B. Virus C. soft

● A （75） infected computer may lose its data. （75）A. file B. data base C. virus D. program

● A （75） infected computer may lose its data. （75）A. file B. data base C. virus D. program

Computer virus, whose essential ______ is a set of instructions, is one kind of threat to