题目内容

P______ are abstract mental representations of the phonological units of a language.

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The allophones of a phoneme are in c__________ d__________; that is they never occur in identical environments.

The feature S__________refers to an acoustic property of the sounds being classified, specifying the amount of hissing noise in a sound.

The a__________ rule make two neighboring segments more similar by duplicating a phonetic property of the other segment.

1.If we want to combine three consonants together, the combination should obey consonant c__________ rules.

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