A B
C D
The data, when they are not encrypted, are called
A B
C D
A virus is a
A B
C D
Many viruses go resident in the memory like a ( ).
A B
C D
Now, about ( ) different viruses account for all the viruses that actually spread in t
A B
C D
C、attack phase
D、creaｔe phase
2、( ) maybe a certain cause that some viruses infect upon.
A、a day
B、a time
C、an external event on your PC
D、a counter within the virus
3、Many viruses do harmful things such as ( ).
A、deleting files
B、simulating typos
C、slowing your PC down
D、changing random data on your disk
4、If a virus simply reproduce and have no cause for an attack phase, but it will still ( ) without your permission.
A、stealing storage
B、pilfer CPU cycles
C、del＿ete files
D、play music
5、Some viruses, with no attack phase, often damage the programs or disks they infect bec ause they ( ).
A、have bugs in them
B、contain poor quality code
C、steal storage
D、show messages on your screen
第三题、判断题（每题1分，5道题共5分）
正确错误
Michelangelo is a file sector.
正确错误
Computer virus is remote from us.
正确错误
Computer virus may affect the your phisical health .
正确错误
The author thinks that understanding how an attacker approaches your computer system c 正确错误。