题目内容

All the back vowels in English are pronounced with rounded lips except______.

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The assimilation rule assimilates one sound to another by "copying" a feature or a sequential phoneme, thus making the two phones _____.

A. identical
B. same
C. exactly alike
D. similar

Since /p/ and /b/ are phonetically similar, they occur in the same environments and can distinguish meaning, they are said to be ______.

A. in phonetic contrast
B. the allophones
C. in complementary distribution
D. minimal pair

A(n) ____ is a unit that is of distinctive value. It is abstract unit, a collection of distinctive phonetic features.

A. phone
B. sound
C. allophone
D. phoneme

_______ is the smallest meaningful unit of language.