Viruses can be transmitted by.
A: Booting a PC from an infected mediu.
B: executing an infected program.
C: pirated software and shareware.
D: All of the above.
A: Booting a PC from an infected mediu.
B: executing an infected program.
C: pirated software and shareware.
D: All of the above.
举一反三
- The most serious damage caused by the viruses is that ______. A: the computer's functions are lowered B: the normal programs are damaged C: all the information stored in the computer is gone D: the computer infected by the viruses can't be used any longer
- Which of the following can be inferred from the passage A: There are useful viruses as well as harmful ones. B: Many virus checking software is free of charge. C: Even if you take the advice, your computer may still be infected with viruses. D: Shut down your computer whenever there is a virus.
- The software of a CNC system consists of a part program, a service program and a control program.
- isafe from a disease, because you cannot be infected by it
- The World Health Organization says that the virus can ________ from an infected person to another in close contact. A: transplant B: transform C: transport D: transmit