Pitch variation is known as __

Pitch variation is known as __________ when its patterns are imposed on sentences.
A、intonation
B、tone
C、pronunciation
D、voice

【参考答案及解析】 
本题考查音系学中的语音语调。 “Pitch variation”指音调变异，故应选A, “声调语调”，综上，A选项正确。 B选项，口气，语气，故排除。 C选项，发音，故排除。 D选项，声音，嗓音，故排除。 故正确答案为A。

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