单项选择题

‍

A．3
B．-1
C．2
D．0

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多项选择题

To put it in a simple way, linguistics studies ________, meaning of linguistic units, and the use and interpretation of a sentence in different contexts.

A．properties of speech sounds
B．combination of speech sounds into a meaningful unit
C．word formation
D．sentence structure

单项选择题

在程序中凡是以“＃”开始的语句行都是预处理命令行

A．对
B．错