● 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．A．fileB．databaseC．VirusD．program

Computer（75)is a complex consisting of two or moreconnected computing units， it is used fo

●The firewall device is a（75）system for connecting a computer network to other computer ne

● 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

● Computer（75） is a complex consisting of two or more connected computing units, it is use