6 當我們說「答話」時,「話」字的聲母會產生圓唇,這是下列何種現象?
(A)詞彙重音效應(lexical stress effect)
(B)協同構音(coarticulation)
(C)母音簡化(vowel reduction)
(D)衰退(declination)

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統計: A(4), B(242), C(0), D(0), E(0) #887383