单项选择题

In C language, （） are used to create variables and are grouped at the top of a program block.

A．declarations
B．dimensions
C．comments
D．descriptions

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单项选择题

（） are those programs that help find the information you are trying to locate on the WWW.

A．Windows
B．Search Engines
C．Web Sites
D．Web Pages

单项选择题

In C language, a （） is a series of characters enclosed in double quotes.

A．matrix
B．string
C．program
D．stream

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