单项选择题:
Which of the following statements is NOT correct（）
A. A phoneme is the smallest unit of sound.
B. A grapheme is the smallest unit of writing.
C. A sememe is the smallest unit of meaning.
D. A morpheme is the smallest unit of a word.
网友回答
答案：D
解析:词素是最小的、有意义的语言单位。换句话说，词素是“在词语的构成中最小的、起作用的语言单位”。