填空题 1studies meaning in language, 2 is about principles of forming and understanding correct English sentences, and 3 is concerned with the internal organization of words. They are all among the main branches of linguistics.（人大2006研)
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【正确答案】 1、正确答案：semantics,    2、syntax,    3、morphology    
【答案解析】解析：（语义学研究语言的意义，句法学研究构成句子的规则，形态学研究词汇的内部结构。三者都是语言学的分支。)