Which of the following is NOT mentioned in the passage as an instance of attack by a hacker
A: Deleting information in the computer's memory.
B: Shutting down the computer whenever he wishes.
C: Entering your house to steal.
D: Spoiling a system for air traffic.
A: Deleting information in the computer's memory.
B: Shutting down the computer whenever he wishes.
C: Entering your house to steal.
D: Spoiling a system for air traffic.
举一反三
- 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.
- Anti-Virus software protects your computer from viruses by ( ) your computer's memory and disk devices.
- The computer system _____ ___ suddenly while he was searching for<br/>information on the Internet. A: broke down B: broke out C: broke up D: broke in
- The comparison made between the memory capacity of a large computer and that of a human being shows that（） A: the computer’ s memory has a little bigger capacity than a teenager’ s B: the computer’ s memory capacity is much smaller that an adult human being’ s C: the computer’ s memory capacity is much smaller even than a teenager’ s D: both A and B
- Your computer is much better than _______. A: his B: him C: he D: he’s