Which of the following is the smallest unit of speech that can be used to differentiate one word from another?

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问题 Which of the following is the smallest unit of speech that can be used to differentiate one word from another?

选项 A、Morpheme.
B、Allophone.
C、Lexis.
D、Phoneme.

答案D

解析 本题考查音系学。morpheme“语素”,是最小的、有意义的语言单位,不能再进一步划分为更小的语言单位而不破坏或彻底改变其词汇或语法意义;allophone“音位变体”,是同一音位的具体变化形式;lexis“(某语言的)全部词汇”;phoneme“音位”,是语音体系中具有辨义功能的基本单位,是能够区别单词意义的最小语音单位,与题干描述相符。故本题选D。
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