单项选择题

87．In C program, all variables must be (1) before use, usually at the beginning of the function before any (2) statements.
(1)

A．stated
B．instructed
C．illustrated
D．declared

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(1)A．reliabilityB．securityC．readabilityD．usability

单项选择题(1)

A．reliability
B．security
C．readability
D．usability

The ______ in E-mail messages has affected almost every...

单项选择题The ______ in E-mail messages has affected almost every computer around the world and has caused the damage of up to US$1 billion in North America.

A．illness
B．virus
C．weakness
D．attachment

Which one of these statements about connecting to the I...

单项选择题Which one of these statements about connecting to the Internet is true______

A．The Internet can only be used to link computers with same operating system
B．The Internet can be used to connect computers with different ISP
C．You must have a modem to connect to the Internet
D．You must have a telephone line to connect to the Internet

87．In C program, all variables must be (1) before use, usually at the beginning of the function before any (2) statements. (1)

87．In C program, all variables must be (1) before use, usually at the beginning of the function before any (2) statements.
(1)