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网关一般用于两个不同类型的网络之间的互联。 （ ）
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城域网比广域网覆盖范围大。（ ）
_________ is the study of the characteristics of language varieties, the characteristics of their function, and the characteristics of their speakers as these three constantly interact and change within a speech community.
In contrast with other linguists, then, _________ linguists are interested primarily in the history and structure of formerly unwritten languages.
_________ linguistics is an interdisciplinary field which centers around the use of computers to process or produce human language.
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