问题
单项选择题
In C language, ______ are used to create variables and are grouped at the top of a gram block.
A．comments
B．declarations
C．descriptions
D．dimensions
答案
参考答案：B
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In C language, ______ are used to create variables and are grouped at the top of a gram block.
A．comments
B．declarations
C．descriptions
D．dimensions
参考答案：B