题目内容
The assimilation rule assimilates one sound to another by "copying" a feature or a sequential phoneme, thus making the two phones _____.
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Since /p/ and /b/ are phonetically similar, they occur in the same environments and can distinguish meaning, they are said to be ______.
A(n) ____ is a unit that is of distinctive value. It is abstract unit, a collection of distinctive phonetic features.
_______ is the smallest meaningful unit of language.
Words can be classified into open class words and _____ class words.
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