[单项选择]Melissa is a computer ______ that destroyed files in computers and frustrated thousands of users around the world.
A. genius
B. virus
C. disease
D. bacteria

[单项选择]Melissa is a computer ______ that destroyed files in computers and frustrated thousands of users around the world.
A. genius
B. virus
C. disease
D. bacteria

[单项选择]Files can be lost or destroyed accidentally. Keep (74) copies of all data on removable storage media.
A. move
B. paste
C. backdown
D. backup

[单项选择]This program ______ computer files so they can be easily sent by email.
A. suppresses
B. compresses
C. presses
D. impresses

[单项选择]When was the city destroyed


A. On May 10^th.
B. On May 8^th.
C. On May 7^th.
D. On May 5 ^th.

[单项选择]What destroyed Saint-Pierre


A. A big fire.
B. A rain storm.
C. The eruption of a volcano.
D. A big flood.

[单项选择]The house was seriously destroyed.
A. slightly
B. heavily
C. obviously
D. sadly

[单项选择]The city was literally destroyed.（　）
A. obviously
B. eventually
C. actually
D. likely

[单项选择]

Melissa and Love Letter made use of the trust that exists between friends or colleagues.　Imagine receiving an __(71)___from a friend who asks you to open it.　This is what happens with Melissa and several other similar email __(72)___.Upon　running ,such worms usually proceed to send themselves out to email addresses from the victim's address book, previous emails, web pages__(73)___.
As administrators seek to block dangerous email attachments through the recognition of well-known ___(74)____,virus writers use other extensions to circumvent such protection.Executable (.exe) files are renamed to .bat and .cmd plus a whole list of other extensions and will still run and successfully infect target users.
Frequently ,hackers try to penetrate networks by sending an attachment that looks like a flash movie ,which, while displaying some cute animation ,simultaneously runs commands in the background to steal your passwords and give the __(75)__access to your network.A. names
B. cookies
C. software
D. extensions