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题目内容
（伊犁师范-英语语音）
Absence of stress on a syllable, or on a word in some cases, is frequently associated inEnglish withvowel the changes that result from unstressed syllables () .
A . reduction
B . pitch
C . loudness
D . quality
A . reduction
B . pitch
C . loudness
D . quality
参考答案
