单项选择题

Allophones are varied realizations of the same ________ .
phone
B. morpheme
C. phoneme
D. tagmeme

A.

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单项选择题

The vowel is produced without (or little) restriction during its ________ and is always voiced.
pronunciation
B. speaking
C. production
D. articulation

单项选择题

下面不属于结构面产状要素的是()。

A走向
B倾向
C强度
D倾角