填空题 As the lexical words carry the main content of a language while the grammatical ones serve to link its different parts together, the lexical words are also known as content words and grammatical ones 1.

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【正确答案】 1、function words    
【答案解析】[解析] 本题考查功能词。词汇词承载了语言的主要内容，而语法词是用来把不同的片段连接在一起的，所以词汇词又叫做实义词，语法词又叫做功能词。